Share Grade 5 Science - End of Semester 1 Review
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What are the 3 states of matter? (物质的三种状态是什么？)
Solid (固体), Liquid (液体), and Gas (气体).
What are the names for the changes that can happen between states of matter? (物质状态变化的名称是什么？)
Melting (熔化), Freezing (凝固), Evaporating (蒸发), and Condensing (液化).
What is the boiling point of water? (水的沸点是多少？)
100°C
What is the melting point of water? (水的熔点是多少？)
0°C
What is the difference between pitch and volume? (音调和音量的区别是什么？)
Pitch is how high or low a sound is (声音的高低). Volume is how loud or quiet a sound is (声音的大小).
How are sounds made? (声音是如何产生的？)
Sounds are made when objects vibrate (物体振动). Vibrations are quick movements back and forth.
What are particles (粒子) like in a solid?
Solid: Very close together and can only vibrate. (靠得很近，只能振动)
What are particles (粒子) like in a liquid?
Liquid: Close together but can slide past each other. (靠得很近，但可以相互滑动)
What are particles (粒子) like in a gas?
Gas: Very far apart and move quickly in all directions. (距离很远，快速向各个方向移动)
What happens to substances (物质) when they cool down?
Cool down: They contract / take up less space. (收缩/占用空间变小)
What happens to substances (物质) when they are heated?
Are heated: They expand / take up more space. (膨胀/占用空间变大)
What is the difference between a solvent and a solute? (溶剂和溶质的区别是什么？)
A solute is the solid that dissolves (溶质是溶解的固体，如糖). A solvent is the liquid the solid dissolves into (溶剂是固体溶解在其中的液体，如水).
What’s the difference between a reversible and an irreversible change? (可逆变化和不可逆变化的区别是什么？)
A reversible change can be changed back to how it was before (可以还原). An irreversible change cannot be changed back (不可以还原).
