Science
Science on the TASC Japanese
The Science domain tests your understanding of scientific principles and your ability to interpret data and apply the scientific method. Topics include life science, physical science, earth and space science, and scientific inquiry.
Key concepts to master:
- Scientific method: Formulate hypotheses, identify variables (independent, dependent, controlled), and interpret experimental results.
- Life science: Understand cells, genetics, ecosystems, and the human body systems.
- Physical science: Grasp properties of matter, atomic structure, chemical reactions, forces, motion, and energy.
- Earth and space science: Learn about the rock cycle, plate tectonics, weather, and the solar system.
- Data interpretation: Read graphs and tables, identify trends, and draw conclusions.
- Scientific reasoning: Distinguish between observation and inference, and between theory and law.
Common traps:
- Confusing independent and dependent variables.
- Assuming correlation implies causation.
- Misreading graphs (e.g., ignoring axis labels or scales).
- Overlooking the control group in an experiment.
- Confusing mass and weight, or speed and velocity.
- Forgetting that scientific theories are well-supported explanations, not guesses.
Rule of thumb: In an experiment, the independent variable is what the scientist changes; the dependent variable is what is measured. The control group does not receive the experimental treatment.
Worked example: Experiment: A student wants to test how fertilizer affects plant growth. She plants 10 identical seedlings in identical pots with the same soil and water. She adds fertilizer to 5 plants and no fertilizer to the other 5. After 4 weeks, she measures plant height. Question: What is the independent variable? Answer: The amount of fertilizer. The dependent variable is plant height. The control group is the 5 plants without fertilizer. Constants include pot size, soil type, and water amount.