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Archive · October 28, 2026

Grade 7 Science: 10 Free Practice Questions

A brand-new set of Grade 7 science practice questions every single day, with the answer and a full explanation for each one. No account, no paywall — tap an answer to check it.

1Using the formula PE = mgh (with g = 10 m/s²), what is the gravitational potential energy of a 5 kg object raised 10 meters above the ground?

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Answer: 500 J
PE = mgh = 5 kg × 10 m/s² × 10 m = 500 J. Distractors result from omitting a factor or performing the wrong operation.

2Which is an example of an abiotic factor in an ecosystem?

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Answer: sunlight
Abiotic factors are nonliving.

3Which statement correctly compares the energy of a wave with a large amplitude to a wave with a small amplitude, assuming both have the same wavelength?

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Answer: The wave with the larger amplitude carries more energy
Amplitude is directly related to the energy of a wave; a wave with greater amplitude carries more energy, which is why louder sounds and brighter light have greater amplitudes.

4What is the main function of red blood cells in the human body?

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Answer: Transporting oxygen to body tissues
Red blood cells contain hemoglobin, a protein that binds oxygen in the lungs and releases it to body tissues. White blood cells fight infection, and platelets are responsible for clotting.

5Which best describes the difference between weather and climate?

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Answer: Weather refers to short-term atmospheric conditions, while climate refers to long-term average patterns over many years
Weather describes the current or short-term state of the atmosphere (a single day or week), while climate describes the average weather patterns of a region observed over a long period, typically 30 years or more.

6Using the formula PE = mgh (with g = 10 m/s²), what is the gravitational potential energy of a 6 kg object raised 8 meters above the ground?

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Answer: 480 J
PE = mgh = 6 kg × 10 m/s² × 8 m = 480 J. Distractors result from omitting a factor or performing the wrong operation.

7Which process best explains how a large boulder gradually breaks down into smaller rock fragments and eventually soil over time due to exposure to rain, ice, and wind?

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Answer: Weathering
Weathering is the process by which rocks are broken down into smaller pieces through mechanical (physical) or chemical processes caused by exposure to environmental elements such as water, ice, and wind.

8Which is evidence of a chemical change?

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Answer: a gas forms when two substances mix
New gas suggests a new substance formed.

9Which best explains why coastal areas tend to have milder, more stable temperatures throughout the year compared to inland areas at the same latitude?

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Answer: Water heats up and cools down more slowly than land, moderating nearby air temperatures
Water has a high specific heat capacity, meaning it absorbs and releases thermal energy more slowly than land, which moderates temperature swings in coastal regions compared to inland areas.

10Which type of plate boundary is most closely associated with the formation of deep ocean trenches and volcanic mountain ranges through subduction?

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Answer: Convergent boundary
At a convergent boundary, one tectonic plate is forced beneath another (subduction), which can create deep ocean trenches and volcanic activity along the overriding plate.

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