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Earth, Space & Weather

Grade 2 · Stretch challenge · 8 questions · Version PG-1PI2RKJ-1NUH

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1.Explain “plate tectonics” in your own words.
2.Explain “rock cycle” in your own words.
3.Explain “watershed” in your own words.
4.Explain “front” in your own words.
5.Explain “fossil” in your own words.
6.Explain “climate” in your own words.
7.Explain “groundwater” in your own words.
8.Explain “atmosphere” in your own words.

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 17
  1. Explain “plate tectonics” in your own words.the movement of large sections of Earth's crust
  2. Explain “rock cycle” in your own words.processes that transform rocks among major types
  3. Explain “watershed” in your own words.land that drains water to the same outlet
  4. Explain “front” in your own words.a boundary between air masses
  5. Explain “fossil” in your own words.preserved evidence of past life
  6. Explain “climate” in your own words.long-term patterns of weather in a region
  7. Explain “groundwater” in your own words.water stored in soil and rock below the surface
  8. Explain “atmosphere” in your own words.the layer of gases surrounding Earth

Worked example

Use observations and long-term patterns to explain Earth systems.

Common mistake

Confusing a short-term weather event with a climate pattern.

Helpful hint

Check the time scale in the question.