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Science thinking · no-sign-up sample

Science sample · Grades 7–8

Five short questions with a real teaching moment. On a phone, move through one clear question at a time.

Question 1 of 5

Biology - free strategy

Which organelle releases usable energy from food?

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Learn the strategy

Connect cell structures to their jobs

Cells use mitochondria to release usable energy from food.

  1. Food molecules hold chemical energy.
  2. Mitochondria help release that energy.
  3. The cell uses it for its activities.

Question 2 of 5

Physics

A force that opposes motion between touching surfaces is __.

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Question 3 of 5

Chemistry

A solution with a pH of 3 is __.

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Question 4 of 5

Earth Science

Most earthquakes occur near the edges of __.

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Question 5 of 5

Astronomy

A large collection of stars, gas, and dust held together by gravity is a __.

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