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Science Review

Grade 5 · On-level practice · 10 questions · Version PG-TCHH05-1AF4

1.

What is the difference between weather and climate?

2.

What does conservation of energy mean?

3.

Why does salt lower water's freezing point?

4.

Why do seasons occur?

5.

How do greenhouse gases warm Earth?

6.

What evidence shows a chemical reaction occurred?

7.

What is density?

8.

Why are food webs more realistic than single food chains?

9.

What type of boundary forms when plates move apart?

10.

What transfers traits from parents to offspring?

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 12
  1. What is the difference between weather and climate?Weather is short-term; climate is long-term patterns
  2. What does conservation of energy mean?Energy changes form but is not created or destroyed
  3. Why does salt lower water's freezing point?It disrupts ice crystal formation
  4. Why do seasons occur?Earth's tilt as it orbits the Sun
  5. How do greenhouse gases warm Earth?They absorb and re-emit infrared energy
  6. What evidence shows a chemical reaction occurred?New substances form
  7. What is density?Mass per unit volume
  8. Why are food webs more realistic than single food chains?Organisms have multiple food sources and predators
  9. What type of boundary forms when plates move apart?Divergent boundary
  10. What transfers traits from parents to offspring?Genes

Worked example

Connect the question to an observable process or scientific model.

Common mistake

Selecting a familiar term without checking its meaning.

Helpful hint

Explain why your answer makes sense.