1. When the temperature of the environment decreases, the boiling point of the pure substance will ? a. increase b. double C. decrease d. stay the same

2. It refers to a form of matter having its own unique properties, and consists of only one kind of element.
a. Substance
b. Homogeneous
c. Mixture
d. Heterogeneous

3. When the temperature of the environment increases, the boiling point of the pure substance will a. Increase b. decrease C. double d. stay the same

4. What do you call the pressure that exerts by weight of air particles?
a. Vapor pressure
b.boiling pressure
c. atmospheric pressure
d. boiling

5. When the liquid starts bubbling up after being heated, the pressure of the atmosphere becomes equal to the pressure of the vapour from the liquid. When this happens, the liquid is described as
a.boiling
b. heating
C. evaporating
d. melting​