I85PREP
⌘ K
GA Milestones Grade 5 Science study materials
GA Milestones Grade 5 Science study resources

GA Milestones Grade 5 Science practice questions

One question at a time. Build your GA Milestones Grade 5 Science understanding.

First 50 of 200 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1Science

A student observes that a metal spoon left in a cup of hot tea soon feels warm at the handle. Which form of heat transfer best explains this observation?

  1. Convection within the tea
  2. Radiation from the room
  3. Conduction through the metal Correct answer.
  4. Evaporation from the tea surface

Explanation

Heat moves through a solid when fast-moving particles bump into slower neighboring particles, which is conduction. Metal particles pass this energy along the spoon toward the cooler handle. Convection and radiation can also move heat, but neither explains energy traveling along the solid metal.

Question 2Science

Which statement correctly describes the Sun's position in our solar system?

  1. It orbits Earth once each day.
  2. It is the star at the center of the solar system. Correct answer.
  3. It is the largest planet in the solar system.
  4. It is a moon that orbits Jupiter.

Explanation

The Sun is a star, and it sits at the center of the solar system with planets orbiting it. Its huge mass keeps the planets in orbit. It is not a planet or a moon, and it does not orbit Earth.

Question 3Science

A class sorts animals into two groups based on whether they have a backbone. Which pair of animals both belong in the group with a backbone?

  1. Frog and eagle Correct answer.
  2. Snail and beetle
  3. Earthworm and jellyfish
  4. Crab and octopus

Explanation

Animals with a backbone are vertebrates, and frogs and eagles both have an internal skeleton with a spine. Earthworms, jellyfish, snails, beetles, crabs, and octopuses are invertebrates without a backbone. Sorting by this single trait places only the frog and eagle together.

Question 4Science

Which change to a habitat would most likely cause a population of birds to decline?

  1. A disease killing many of the trees where the birds nest Correct answer.
  2. A mild winter with steady temperatures
  3. A nearby pond staying full all year
  4. More insects becoming available as food

Explanation

A population depends on food, water, shelter, and space, so losing nesting trees removes a basic need. Fewer nesting sites mean fewer young can be raised and protected. The other changes add resources or reduce stress rather than removing what the birds need.

Question 5Science

Which property of a mineral is tested by scratching it against a hard tile and observing the color of the powder left behind?

  1. Cleavage
  2. Streak Correct answer.
  3. Luster
  4. Magnetism

Explanation

Streak is the color of the powder a mineral leaves when rubbed on an unglazed tile. The powder color can differ from the color of the whole sample. Luster describes how a surface reflects light, cleavage describes how a mineral breaks, and magnetism is attraction to a magnet.

Question 6Science

A ball is pushed across a smooth floor and slowly comes to a stop. Which force most directly causes the ball to slow down?

  1. Magnetism from the floor
  2. The ball's own mass pushing it forward
  3. Friction between the ball and the floor Correct answer.
  4. Gravity pulling the ball sideways

Explanation

Friction is a contact force that opposes motion between surfaces, so it acts on the rolling ball and reduces its speed. Gravity pulls downward, not sideways along the floor. Mass is a property of matter, not a force that pushes objects forward.

Question 7Science

Which statement best describes what happens during photosynthesis?

  1. Plants make food only at night when sunlight is absent.
  2. Plants release oxygen and take in carbon dioxide to make food. Correct answer.
  3. Plants take in oxygen and release carbon dioxide to make food.
  4. Plants absorb food directly from the soil through their roots.

Explanation

During photosynthesis, plants use sunlight, water, and carbon dioxide to make sugar and release oxygen. The carbon dioxide enters through openings in the leaves, and oxygen leaves as a waste product. Plants do not absorb ready-made food from soil, and photosynthesis requires light.

Question 8Science

Which sequence correctly shows the path of blood through the heart and body?

  1. Lungs to body to heart to lungs
  2. Body to heart to lungs to heart to body Correct answer.
  3. Heart to body to lungs to heart to body
  4. Body to lungs to heart to body

Explanation

Blood returns from the body to the heart, is pumped to the lungs to pick up oxygen, returns to the heart, and is then pumped out to the body. This loop repeats continuously. The correct order follows that full circuit.

Question 9Science

A student mixes sand and water in a jar, shakes it, and lets it sit. The sand settles to the bottom. Which statement best explains this result?

  1. Sand changed into a new substance through a chemical reaction.
  2. Sand dissolved completely in the water.
  3. Sand floated because it is less dense than water.
  4. Sand is denser than water and is pulled down by gravity. Correct answer.

Explanation

Sand does not dissolve in water; it forms a mixture that can be separated by settling. Because sand particles are denser than water, gravity pulls them to the bottom. No new substance forms, so this is a physical change, not a chemical one.

Question 10Science

A student wants to find out whether fertilizer affects how tall bean plants grow. Which setup is the best controlled investigation?

  1. Grow one plant with fertilizer and measure it once at the end.
  2. Give some plants fertilizer and others extra water and sunlight.
  3. Give some plants fertilizer and others none, keeping light, water, and soil the same. Correct answer.
  4. Grow plants in different soils and add fertilizer to all of them.

Explanation

A controlled investigation changes only one variable, the fertilizer, while keeping all other conditions the same. That way any difference in height can be linked to the fertilizer. Changing several factors at once would make the cause unclear.

Question 11Science

Which statement correctly compares the mass and weight of an object?

  1. Weight is the amount of matter in an object, while mass is the pull of gravity on it.
  2. Mass and weight are the same measurement and are both measured in newtons.
  3. Mass changes with location, but weight stays the same everywhere.
  4. Mass is the amount of matter in an object, while weight is the pull of gravity on it. Correct answer.

Explanation

Mass measures how much matter an object contains and does not change when the object moves to another place. Weight measures the gravitational force on that matter, so it changes where gravity is stronger or weaker. The two quantities are related but not identical.

Question 12Science

Water vapor in the air cools and forms tiny droplets on a cold glass. Which process does this describe?

  1. Melting
  2. Evaporation
  3. Condensation Correct answer.
  4. Freezing

Explanation

Condensation is the change from a gas to a liquid. When water vapor touches a cold surface, it loses energy and forms liquid droplets. Evaporation is the opposite change, and melting and freezing involve solids and liquids.

Question 13Science

A food chain in a pond is algae, then small fish, then a heron. If a disease greatly reduces the algae, what is the most likely short-term effect?

  1. The small fish will begin making their own food from sunlight.
  2. The algae will be replaced by herons as the producers.
  3. The heron population will immediately increase because fewer fish are present.
  4. The small fish population will decrease because their food supply shrinks. Correct answer.

Explanation

Producers such as algae capture energy that passes to the rest of the food chain. When producers decline, the consumers that eat them lose food energy, so the fish population shrinks. Effects then move up the chain to the heron.

Question 14Science

Which example best shows a physical change rather than a chemical change?

  1. Milk souring in a warm room
  2. Ice melting into liquid water Correct answer.
  3. A nail rusting in damp air
  4. A log burning in a fireplace

Explanation

A physical change alters the form or appearance of a substance without creating a new substance. Melting ice changes water from solid to liquid, and it can be frozen back again. Rusting, burning, and souring all produce new substances with different properties.

Question 15Science

Earth has day and night because of which motion?

  1. Earth revolving around the Sun once each year
  2. Earth rotating on its axis once about every 24 hours Correct answer.
  3. The Moon orbiting Earth once each month
  4. The Sun moving around Earth once each day

Explanation

Earth spins on its axis, completing one rotation roughly every 24 hours. The side facing the Sun has day, and the side turned away has night. The yearly orbit around the Sun causes the seasons rather than day and night.

Question 16Science

A student builds a simple series circuit with a battery, a wire, and a bulb, but the bulb does not light. Which change is most likely to make the bulb light?

  1. Turn the bulb so it faces a window.
  2. Replace the battery with a piece of string.
  3. Add a second bulb in the same path.
  4. Close the circuit by connecting the loose wire end to the battery. Correct answer.

Explanation

A bulb lights only when electric current can flow in a complete, closed loop from the battery through the bulb and back. A loose wire breaks that loop, so reconnecting it restores the path. Adding another bulb in series would increase resistance and dim the light rather than fix an open circuit.

Question 17Science

Which adaptation most helps a cactus survive in a dry desert?

  1. Broad, thin leaves that lose water quickly
  2. Shallow roots that spread only a few centimeters
  3. Bright flowers that open only at night
  4. A thick stem that stores water and reduces water loss Correct answer.

Explanation

A cactus survives drought by storing water in a thick stem and limiting water loss. Its leaves are reduced to spines, which also reduces evaporation. Broad thin leaves and very shallow roots would make water loss worse.

Question 18Science

The fossil of a fish is found in a rock layer high on a mountain. Which conclusion is best supported by this evidence?

  1. Fish once lived in an area that is now a mountain. Correct answer.
  2. The mountain formed before fish existed on Earth.
  3. The fossil was formed by wind carving the rock.
  4. Fish can climb mountains to lay their eggs.

Explanation

Fossils are remains or traces of once-living things preserved in rock. A fish fossil high on a mountain suggests the area was once covered by water and later uplifted. It does not mean fish climbed the mountain or that wind carved the fossil.

Question 19Science

A student measures the mass of a closed jar containing a piece of steel wool, then leaves it for a week while the wool rusts. The jar stays sealed. What should the student observe about the total mass?

  1. The mass will stay the same because matter is conserved in a closed system. Correct answer.
  2. The mass will decrease because the steel wool is used up.
  3. The mass will increase because rust weighs more than steel.
  4. The mass will double because a chemical change occurred.

Explanation

In a closed system, matter is not created or destroyed, only rearranged. When steel wool rusts, oxygen from the trapped air joins with iron to form rust, so the total mass of jar and contents stays the same. The change is a chemical reaction, but no matter escapes or appears.

Question 20Science

Which statement correctly describes how sound travels from a ringing bell to a listener?

  1. Sound travels as a steady stream of tiny particles from the bell to the ear.
  2. Sound travels as vibrating particles passing energy through the air. Correct answer.
  3. Sound travels as light waves that the ear converts into vibrations.
  4. Sound travels only through empty space where no particles exist.

Explanation

Sound is a form of energy carried by vibrations. The ringing bell makes nearby air particles vibrate, and those vibrations pass energy from particle to particle until they reach the ear. Sound needs a medium such as air and cannot travel through empty space.

Question 21Science

A student places a clear glass of water in sunlight and sees a rainbow pattern on the wall. Which statement best explains the pattern?

  1. The glass changed the sunlight into a single color.
  2. The wall produced its own colored light in response to heat.
  3. The water absorbed all the light and later released new light.
  4. The water and glass bent light, separating white light into colors. Correct answer.

Explanation

White light is a mixture of colors, and when it passes through materials such as water and glass it can bend and separate. This bending spreads the colors into a rainbow pattern. The materials do not create new light or absorb all of it.

Question 22Science

Which statement best explains why the Moon appears to change shape over a month?

  1. The Moon makes its own light that turns on and off.
  2. Clouds block parts of the Moon in a repeating pattern.
  3. Earth's shadow covers a different part of the Moon each night.
  4. We see different amounts of the Moon's sunlit half as it orbits Earth. Correct answer.

Explanation

The Moon does not make its own light; it reflects sunlight. As the Moon orbits Earth, we see different amounts of its sunlit side, producing phases. Earth's shadow causes eclipses, which are rare and do not explain the monthly cycle.

Question 23Science

Two students test how the length of a string affects the pitch of a plucked string. They use strings of different lengths but also change the thickness of each string. Why is this investigation poorly designed?

  1. The investigation needs at least ten strings to be valid.
  2. More than one variable changes, so the effect of length cannot be isolated. Correct answer.
  3. Pitch cannot be measured, so the investigation is impossible.
  4. Strings do not produce sound unless they are struck.

Explanation

In a fair test, only the variable being tested should change while everything else stays the same. Here both length and thickness change, so any difference in pitch could come from either one. The design must keep thickness constant to show the effect of length alone.

Question 24Science

A population of light-colored mice lives on pale sand, and dark-colored mice are easier for hawks to see. Over many generations, most mice in the population are light-colored. Which explanation best fits this pattern?

  1. Hawks changed color to match the sand and stopped hunting mice.
  2. The sand caused the mice's fur to bleach to a lighter color.
  3. Dark mice were eaten more often, so light mice survived and passed on their traits. Correct answer.
  4. Light mice chose to become lighter so hawks could not find them.

Explanation

Individuals with traits that help them survive and reproduce are more likely to pass those traits to offspring. On pale sand, light mice blend in and are less likely to be caught, while dark mice are more visible. Over generations, the helpful trait becomes more common in the population.

Question 25Science

A beaker of water at 20°C is placed in a room at 20°C. Which statement best describes the heat transfer between the water and the room?

  1. Heat flows in both directions equally, so the water slowly warms.
  2. Heat flows from the water to the room because water holds more heat.
  3. No net heat flows because the water and room are at the same temperature. Correct answer.
  4. Heat flows from the room to the water until the water boils.

Explanation

Heat flows from a warmer object to a cooler object until both reach the same temperature. When the water and room are both at 20°C, they are already at the same temperature, so there is no net heat flow. The water will not warm or boil under these conditions.

Question 26Science

A student observes a clear liquid in an open cup left on a windowsill. After several days the liquid is gone, and no solid remains. Which process best explains what happened to the liquid?

  1. The liquid froze, changing from a liquid to a solid.
  2. The liquid melted, changing from a solid to a liquid.
  3. The liquid condensed, changing from a gas to a liquid.
  4. The liquid evaporated, changing from a liquid to a gas. Correct answer.

Explanation

Evaporation is the change of state in which a liquid gains energy and becomes a gas. In an open cup, the gas escapes into the air, so the liquid appears to disappear without leaving a solid behind.

Question 27Science

Which object in a classroom is the best conductor of electric current?

  1. A glass beaker
  2. A plastic ruler
  3. A copper wire Correct answer.
  4. A rubber eraser

Explanation

Metals such as copper have loosely held electrons that move easily, so they carry electric current well. Rubber, glass, and plastic hold their electrons tightly and act as insulators.

Question 28Science

A student classifies a dolphin as a mammal even though it lives in the ocean. Which set of traits best supports that classification?

  1. It has hair, breathes air with lungs, and feeds its young milk. Correct answer.
  2. It has gills and lays eggs in water.
  3. It has a backbone and a body covering of feathers.
  4. It has scales and breathes through moist skin.

Explanation

Mammals share key traits: hair or fur, lungs for breathing air, and milk produced for their young. A dolphin meets all of these even though its habitat is the ocean.

Question 29Science

A student observes that the Sun appears to rise in the east and set in the west. Which motion of Earth best explains this observation?

  1. Earth rotating on its axis once each day Correct answer.
  2. Earth's axis tilting toward the Sun each summer
  3. The Sun orbiting Earth once each day
  4. Earth revolving around the Sun once each year

Explanation

Earth spins on its axis from west to east, making the Sun appear to move across the sky from east to west. One full rotation takes about 24 hours and produces the daily pattern.

Question 30Science

Which statement best describes the role of producers in an ecosystem?

  1. They break down dead organisms and return nutrients to the soil.
  2. They absorb nutrients from the remains of other organisms only.
  3. They hunt other animals to control population sizes.
  4. They capture sunlight and make food that other organisms can use. Correct answer.

Explanation

Producers, such as green plants and algae, use sunlight to make their own food through photosynthesis. That stored energy then passes to consumers through food chains.

Question 31Science

A student heats a metal spoon at one end while holding the other end. Soon the held end feels warm. Which statement best explains this?

  1. Heat moves through the metal by convection currents inside the solid.
  2. Heat moves through the metal by conduction from warmer to cooler parts. Correct answer.
  3. The spoon creates its own heat because it is a solid.
  4. Cold moves from the hand into the spoon, making the spoon feel warm.

Explanation

Conduction is heat transfer through direct contact as particles pass energy along. In a metal, particles at the heated end vibrate faster and transfer energy toward the cooler end.

Question 32Science

A student looks at a rock sample and finds it contains several different minerals pressed together in layers. Which type of rock is the student most likely observing?

  1. Igneous rock formed from cooled magma
  2. Volcanic glass formed from rapid cooling
  3. Sedimentary rock formed from compacted materials Correct answer.
  4. Metamorphic rock changed by heat and pressure

Explanation

Sedimentary rock forms when sediments such as sand, shells, and small rock pieces are deposited, compacted, and cemented together. Layering and mixed mineral grains are typical features.

Question 33Science

Which change in a food web would most likely increase the number of rabbits in a meadow?

  1. A disease that kills most of the hawks Correct answer.
  2. A drought that removes most of the grass
  3. A fire that destroys the meadow plants
  4. An increase in the number of foxes

Explanation

Hawks are predators of rabbits, so fewer hawks means fewer rabbits are eaten and more survive. The other changes all reduce food or increase predation.

Question 34Science

A student wants to separate a mixture of iron filings and sand. Which method is best?

  1. Use a magnet to pull the iron filings out of the mixture. Correct answer.
  2. Shake the mixture through a screen with large holes.
  3. Stir the mixture into water and wait for it to settle.
  4. Heat the mixture until one material melts.

Explanation

Iron is magnetic and sand is not, so a magnet attracts only the iron filings and separates them cleanly. This uses a physical property to separate the parts of the mixture.

Question 35Science

A student observes a plant cell and an animal cell under a microscope. Which structure would be found in the plant cell but not in the animal cell?

  1. A cell membrane
  2. A nucleus
  3. A rigid cell wall Correct answer.
  4. Cytoplasm

Explanation

Plant cells have a stiff cell wall made mostly of cellulose that supports the cell and gives it shape. Animal cells lack a cell wall and have only a flexible cell membrane.

Question 36Science

A student shines a flashlight into a dark room and sees a beam of light. Which statement best describes what the light is doing?

  1. The light needs air to move but stops in a vacuum.
  2. The light travels in a straight line until it strikes a surface. Correct answer.
  3. The light travels only when it hits an object first.
  4. The light bends around corners to fill the whole room.

Explanation

Light travels in straight lines through a uniform medium, which is why a beam looks like a straight path. It continues until it is absorbed, reflected, or refracted by matter.

Question 37Science

A student has two magnets and finds that one end of each magnet pushes the other away. What can the student conclude about those two ends?

  1. Both ends are north poles or both are south poles. Correct answer.
  2. One of the magnets has lost all of its magnetism.
  3. One end is a north pole and the other is a south pole.
  4. Both magnets are made of nonmagnetic material.

Explanation

Like magnetic poles repel each other, so two north poles or two south poles push apart. Opposite poles, north and south, attract instead.

Question 38Science

A student places a small toy boat in a tub of water and adds a heavy metal block to the boat. What happens to the boat?

  1. The boat sinks deeper because the total weight increases. Correct answer.
  2. The boat floats higher because metal is lighter than water.
  3. The boat rises out of the water completely.
  4. The boat stays at exactly the same depth.

Explanation

A floating object sinks until the buoyant force of the displaced water equals its weight. Adding mass increases the weight, so the boat must displace more water and sits lower.

Question 39Science

Which statement best explains why a metal pan has a plastic handle?

  1. Plastic is an insulator, so it slows heat transfer to the hand. Correct answer.
  2. Plastic is magnetic, so it holds the pan together.
  3. Plastic is denser than metal, so it stays cool.
  4. Plastic is a better conductor, so it heats the food faster.

Explanation

Insulators such as plastic do not transfer heat easily, so a plastic handle stays cooler than metal. This protects a person's hand from burns.

Question 40Science

A student observes that the Moon shows a full face one week and a thin crescent about three weeks later. Which statement best explains the changing appearance?

  1. We see different amounts of the Moon's sunlit half as it orbits Earth. Correct answer.
  2. Clouds on Earth block parts of the Moon's surface.
  3. Earth's shadow covers different amounts of the Moon each night.
  4. The Moon makes its own light that turns on and off.

Explanation

Half the Moon is always lit by the Sun, but as the Moon orbits Earth we see different portions of that lit half. These changing views are the phases of the Moon.

Question 41Science

A student compares two samples of the same substance. Sample A has twice the volume of Sample B. Which statement about the samples is correct?

  1. Sample A has half the mass of Sample B.
  2. Sample A has a different density than Sample B.
  3. Sample A has the same mass as Sample B.
  4. Sample A has twice the mass of Sample B. Correct answer.

Explanation

Density is a property of a substance, so samples of the same substance have the same density. Since mass equals density times volume, doubling the volume doubles the mass.

Question 42Science

A student records the temperature of a cup of hot water every minute as it cools in a room. Which pattern is expected?

  1. The temperature rises slowly as the water absorbs heat from the room.
  2. The temperature drops quickly at first, then levels off near room temperature. Correct answer.
  3. The temperature drops at a steady rate until it reaches 0°C.
  4. The temperature stays constant, then rises above the starting value.

Explanation

Heat flows from the warmer water to the cooler room, and the rate slows as the temperatures become closer. The water cools quickly at first and then approaches room temperature.

Question 43Science

Which statement best describes how a lunar eclipse occurs?

  1. The Moon passes directly between Earth and the Sun.
  2. The Sun passes between Earth and the Moon.
  3. Earth's axis tilts away from the Sun.
  4. Earth passes directly between the Sun and the Moon. Correct answer.

Explanation

A lunar eclipse happens when Earth blocks sunlight from reaching the Moon, so Earth is between the Sun and the Moon. The Moon then moves through Earth's shadow.

Question 44Science

A student builds a model of a watershed using a tilted tray of soil with a stream at the bottom. Water sprayed on the top of the tray carries soil into the stream. Which conclusion does the model best support?

  1. Streams form only where no soil is present.
  2. Water cannot move soil unless the soil is dry.
  3. Soil always moves uphill when water is added.
  4. Water moves downhill and can carry soil from higher land into streams. Correct answer.

Explanation

Gravity pulls water downhill, and moving water can erode and carry soil particles. The soil collects in the low stream, showing how runoff moves material across a watershed.

Question 45Science

A student wants to test how the type of surface affects how far a toy car rolls. Which variable should the student change?

  1. The number of trials performed
  2. The height of the ramp
  3. The type of surface the car rolls on Correct answer.
  4. The toy car used in the test

Explanation

The question asks about the effect of surface type, so surface type is the independent variable that should change. Other factors must be held constant to make the comparison fair.

Question 46Science

A student uses a hand lens to examine a leaf and sees tiny structures on its lower surface. Which function do these structures most likely serve?

  1. They store food for the plant.
  2. They allow gases to enter and leave the leaf. Correct answer.
  3. They anchor the leaf to the stem.
  4. They carry water upward from the roots.

Explanation

Small openings called stomata on the lower leaf surface let carbon dioxide in and oxygen and water vapor out. They are part of the leaf's role in gas exchange.

Question 47Science

A student places a balloon that has been rubbed on hair near a thin stream of water from a faucet. The stream bends toward the balloon. Which statement best explains this?

  1. The rubbing cooled the balloon, which froze the water.
  2. The balloon gained a static electric charge that attracts the water. Correct answer.
  3. The water became heavier and fell toward the balloon.
  4. The balloon became magnetic and pulled the water.

Explanation

Rubbing transfers electrons between the balloon and hair, giving the balloon a static charge. That charge attracts neutral water molecules, so the stream bends toward the balloon.

Question 48Science

A student compares a rock sample that contains shell fossils with one that contains large interlocking crystals. Which pair of rock types is most likely represented?

  1. Sedimentary for the fossil sample and igneous for the crystal sample Correct answer.
  2. Igneous for the fossil sample and sedimentary for the crystal sample
  3. Metamorphic for both samples
  4. Sedimentary for both samples

Explanation

Fossils are usually preserved in sedimentary rock, which forms in layers at Earth's surface where organisms can be buried. Large interlocking crystals form when melted rock cools slowly underground, which is typical of intrusive igneous rock.

Question 49Science

Two identical plants are placed in sealed clear containers. Plant A receives sunlight, and Plant B is kept in the dark. After two days, a gas test shows more oxygen in container A. Which conclusion is best supported?

  1. Both plants used oxygen at exactly the same rate.
  2. The containers produced oxygen without any plants.
  3. Plant A released oxygen as part of making food in light. Correct answer.
  4. Plant B released more oxygen because it was in the dark.

Explanation

In sunlight, plants carry out photosynthesis and release oxygen as a product. The higher oxygen level in the lit container supports the conclusion that light allows the plant to make food and give off oxygen.

Question 50Science

A student models a food web with grass, grasshoppers, frogs, and snakes. A chemical kills most of the frogs. Which prediction about the food web is best supported?

  1. Grasshopper numbers may rise, and snakes may have less food. Correct answer.
  2. Grass and snakes will both increase sharply.
  3. The grasshoppers will become producers in the food web.
  4. Grasshopper numbers will fall, and snakes will have more food.

Explanation

Frogs eat grasshoppers, so fewer frogs means less predation on grasshoppers and their numbers may grow. Snakes eat frogs, so snakes lose a food source and may decline.