unite 2.3 term 2 week 2

Frage	Antworten
1. Why does ice cream drip down your hand ?	1.as the day warms ice cream,ice,frost etc will melt.
2.what happens when you and heat a solid, liquid or gas ?	2. It will usually just cause its temperature to increase.
3.what happens when enough heat is add to a solid ?	3. The substance will change state.
4. What happens when enough heat is add to a liquid ?	4.It will change to gas.
5.what is melting ?	5.is when a substance is heated then it changes to a liquid then a gas.
6. what does heat do to particles in a solid?	6. It lets the particles slide over each other.
7.what is the melting point ?	7.the temperature at which a solid melts is known as the melting points.
8. what is evaporation ?	evaporation is the process in which a liquid changes into a solid then a gas.
9. are 2 examples of sublimation ?	9. 1.dry ice 2. iodine
10. What is boiling ?	10. boiling is a special case of evaporation.
11. what happens when a substance is cooled ?	11. The temperature drops
12.what happens to a substance if enough heat is removed from it ?	12. The substance can change state.
13. what is freezing ?	13. Freezing occurs when enough heat is lost and a liquid changes to a solid.
14. what is frost ?	13. Frost is dew that has frozen overnight.
15. How is snow formed ?	15. It is caused by water freezing.
16. what is the opposite of freezing ?	16. The opposite of freezing is heating.
17. what is condensation ?	17. condensation occurs when a gas loses enough heat and changes into a liquid.
18. what is our lung full of ?	18. Our lung is full of water vapour.
19. What is steam ?	19. steam is a water vapour.
20. what is mercury's melting point ?	20. Mercury's melting point is -39.

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unite 2.3 term 2 week 2

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