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Vừa đố, vừa học, và vừa ôn bài !
1) When a solid changes into a liquid, it is called ......
A. vaporization
B. melting
C. evaporation
2) When a solid changes directly into a gas, it is called ......
A. sublimation
B. evaporation
3) When a gas changes into a liquid, it is called ......
A. solidification
B. melting
C. condensation
4) Matter in a solid state has . . . . . volume and . . . . . . shape.
A. __________________ no definite _____ no definite
B. __________________ a definite ______ a definite
C. __________________ a definite ______ no definite
5) How many states of matter are there?
(Scientists call plasmas a state of matter too. You do not have to count plasma as a state of matter for this question).
A. two
B. three
C. five
6) The states of matter are the following: solids, liquids, gases, plastics.
A. True
B. False
7) States are also known as ?
A. phases
B. phrases
C. frases
8) Which phase of matter does not take the shape of the container it is in?
A. solid
B. liquid
9) True or false?
Liquids are hard to compress. Gases are easy to compress.
A. True
B. False
10) When solids reach their melting point they become ......
A. liquids
B. gases
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