Review: Gravity, Stars and the Solar System
Use models of gravity, brightness, day-night and scale.
Bring the unit skills together
Use these 4 new cases to check your reasoning. Choices are temporary and are not saved to an account, sent to staff or recorded as school grades. Download your current review choices before leaving or reloading.
The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.
Use the skills in a new task
Draw or write four parts for “Gravity, Stars and the Solar System”—one pretend example from each lesson. In each part, show what happened, give your answer, and say which clue helped you. If the question gives numbers, show your working too. Finish with one thing the practice case does not tell us. You may say your answers aloud.
Work on paper or in your own document. Explain the choices you made.
- Choose one pretend example from each of the four lessons.
- Name what each example shows.
- If the example gives numbers, show your calculation and unit. Otherwise, say which clue explains your answer.
- Say that the case details are supplied for practice; they are not your own real-life observations.
- Say one thing the example does not tell us, or one change that could give a different answer.
Compare with a model response
Panel 1: Which scientific label fits the specifically described step or feature? Supplied case: Gravity arrow at top of globe points down. Result: inward. Reasoning: The answer is inward. In the notes, it means “direction toward Earth’s center.” Earth’s gravitational pull acts toward Earth’s center. Down is local, so arrows from different surface positions point inward. Gravity does not require air or touching. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 2: Which scientific label fits the specifically described step or feature? Supplied case: Star’s total light output. Result: intrinsic brightness. Reasoning: The answer is intrinsic brightness. In the notes, it means “light emitted by the source.” Stars emit light. Apparent brightness depends on distance and intrinsic light output. The Sun appears very bright largely because it is much closer than other stars. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 3: Which scientific label fits the specifically described step or feature? Supplied case: Earth spins. Result: rotation. Reasoning: The answer is rotation. In the notes, it means “spinning about an axis.” Rotation is spinning about an axis. Revolution is traveling around another body. Earth’s daily rotation explains day-night; its annual revolution with tilted axis relates to seasons. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 4: Supplied case 1: represented distance (million km)=100; scale (million km/cm)=20, using the explicitly named quantities. Diagram length equals represented million kilometers divided by million kilometers per centimeter. What result follows? Result: 5 cm. Reasoning: Substitute the supplied values: (100)/(20) = 5 cm. Divide real-model distance by scale distance per centimeter. Use the same scale for every compared distance. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified.
A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.