Junkao Science Knowledge study plan

Distinguish independent, dependent, and controlled variables in 20 short scenario descriptions, writing the answer before checking.

Write a complete controlled-experiment procedure for three everyday questions, each specifying a control group, sample size rationale, and at least one confound you deliberately eliminated.

Identify flaws in six described experiments (confounding, no control, sampling bias, measurement error) and state the specific fix for each.

Convert between SI prefixes (nano through giga) and perform unit conversions with squared and cubed units in 15 practice items.

Compute mean, median, range, and identify outliers from three small data sets, and state which measure best represents each set.

Draw Bohr and Lewis structures for the first 20 elements and label valence electrons correctly.

Classify 25 substances as element, compound, or mixture, and as ionic or covalent based on formula composition.

Balance 15 chemical equations, including two combustion reactions, and verify atom counts on both sides.

Predict products for synthesis, decomposition, single-replacement, and double-replacement reactions using an activity series and solubility rules.

Explain conservation of mass by calculating expected product mass from given reactant masses in three stoichiometry word problems.

Solve 15 motion problems using v = d/t and a = (v_f - v_i)/t, including unit-consistent answers.

Construct and interpret distance-time and velocity-time graphs, extracting acceleration from slope and displacement from area in five graphs.

Apply Newton's three laws to ten free-body scenarios, drawing force arrows and writing net-force equations.

Calculate work, kinetic energy, gravitational potential energy, and mechanical efficiency in eight problems.

Trace energy transformations in four systems (roller coaster, pendulum, falling object with friction, spring) and state where energy is lost to thermal.

Label the parts and functions of plant and animal cells on a hand-drawn diagram, including organelles unique to each.

Complete and analyze two Punnett squares (monohybrid and one sex-linked or codominant cross), reporting genotype and phenotype ratios.

Describe the steps of mitosis and meiosis and state two concrete differences in outcome between them.

Explain the roles of DNA, mRNA, and protein synthesis at a level sufficient to answer a short-answer item.

Interpret a simple cladogram or fossil-sequence diagram and state the evidence supporting a given evolutionary relationship.

Label wavelength, amplitude, frequency, and crest on a drawn transverse wave and calculate wave speed from frequency and wavelength in five items.

Contrast reflection, refraction, and diffraction with one everyday example of each.

Draw and explain series and parallel circuits, predicting relative brightness and current paths when one bulb is removed.

Apply Ohm's law (V = IR) and power (P = VI) in eight circuit problems.

Describe how electromagnets and induced current work, and list three devices that depend on each principle.

Diagram a food web with at least eight organisms and trace energy flow and trophic levels through it.

Explain the roles of producers, consumers, decomposers, and the carbon and nitrogen cycles in two short written answers.

Distinguish primary, secondary, and tertiary succession and predict the sequence for a given disturbance scenario.

Analyze carrying capacity and limiting factors from a described population data set, and identify density-dependent versus density-independent factors.

Evaluate two human-impact scenarios (invasive species, habitat fragmentation) and propose one mitigation for each.

Describe the layers of Earth and plate-boundary types, and match each boundary to a specific hazard (earthquake, volcano, seafloor spreading).

Explain the rock cycle and classify six rock samples or descriptions as igneous, sedimentary, or metamorphic with reasoning.

Interpret weather fronts and air-mass interactions, and explain how a warm front differs from a cold front in resulting weather.

Explain seasons, moon phases, and eclipses using a drawn Sun-Earth-Moon geometry, correcting two common misconceptions.

Read a data table or simple graph and compute a rate of change (for example, temperature trend or population growth) in three items.

Complete two full-length timed practice sections and score each by domain to identify your two weakest areas.

Re-teach your two weakest domains from notes only, then answer 15 new items in each without referring back.

Build a one-page formula and concept sheet covering measurement, forces, circuits, and genetics, from memory first, then fill gaps.

Review every item you missed across weeks 1-7 and write a corrected explanation for each in your own words.

Simulate exam pacing by completing a 40-item mixed set in a single sitting with a time limit.