science revision-January 2022

which is a producer?

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what type of energy does this picture show？

• heat energy

• wind energy

• electrical energy

• light energy

what type of energy does this picture show？

• heat energy

• wind energy

• electrical energy

• light energy

what type of energy does this picture show？

• heat energy

• wind energy

• electrical energy

• light energy

what type of energy does this picture show？

• heat energy

• wind energy

• movement energy

• light energy

what type of energy does this picture show？

• heat energy

• sound energy

• movement energy

• light energy

what type of energy does this picture show？

• heat energy

• wind energy

• electrical energy

• light energy

Which description best matches this particle model?

• Particles are closely packed, vibrate fixed position, strong intermolecular(分子间的) forces

• Particles are closely packed, no movement, strong intermolecular forces

• Particles are closely packed, move around each other, medium intermolecular forces

which food chain is correct?

• rabbit → grass → wolf

• rabbit → wolf→ grass

• grass → rabbit → tiger

Which picture has a chemical reaction?

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