Question

1. when creating a graph, which variable is usually placed on the x - axis?

a. dependent variable
b. independent variable
c. control variable
d. constant
e. none of the above

1. which of the following is not an essential element of a good graph?

a. a descriptive title
b. clearly labeled axes with units
c. a legend/key (if needed)
d. bright, colorful background
e. none of the above

1. which of the following is true about the molecules in a liquid?

a. they are tightly packed and vibrate in place
b. they have a definite shape and volume
c. they move freely and spread apart to fill the container
d. they slide past one another but have a defined volume
e. none of the above

1. when a liquid changes to a gas at its boiling point, what is this phase change called?

a. freezing
b. condensation
c. evaporation (or vaporization)
d. sublimation
e. melting

1. when a gas changes directly into a solid, this phase change is called?

a. condensation
b. melting
c. freezing
d. deposition
e. sublimation

1. which of the following is an intensive property of matter?

a. mass
b. volume
c. density
d. length
e. none of the above

Explanation:

1. 在繪製圖表時，自變量通常放在x軸上。
2. 明亮、色彩豐富的背景不是好圖表的必要元素，其他選項都是。
3. 液體中的分子可以相互滑動，但有一定的體積。
4. 液體在沸點變成氣體的相變稱為蒸發（或汽化）。
5. 氣體直接變成固體的相變稱為凝華。
6. 密度是物質的強度性質，不隨物質的量而改變，而質量、體積、長度是廣度性質。

Answer:

1. B. 自變量
2. E. None of the above
3. D. 它們相互滑動但有一定的體積
4. C. 蒸發（或汽化）
5. D. 凝華
6. C. 密度