A student had a cup of ice while working outside. After a while, the ice melted because the Sun emits energy in the form of light and OPTIONS:
- electricity.
- heat.
- magnetism.
- sound.
A: heat.

What type of precipitation occurs when raindrops freeze as they fall? OPTIONS:
- hail
- frost
- sleet
- snow
A: sleet

Chromosomes contain the genetic information of an organism. Fruit flies reproduce by sexual reproduction. Most of the cells of a fruit fly have 8 chromosomes. Which statement best explains the source of the chromosomes in a normal fertilized fruit fly egg? OPTIONS:
- The egg cell contains all 8 chromosomes.
- The sperm cell contains all 8 chromosomes.
- The sperm cell provides 4 chromosomes and the egg cell provides 4 chromosomes.
- The egg cell provides 4 chromosomes and 4 sperm cells each provide 1 chromosome.
A: The sperm cell provides 4 chromosomes and the egg cell provides 4 chromosomes.

An ice cube is placed in a pan. The pan is placed over an open flame. Which change will most likely happen over time? OPTIONS:
- The ice changes to a liquid and back to a solid.
- The ice changes to a liquid then to a gas.
- The ice changes to a gas and back to a solid.
- The ice changes to a gas then to a liquid.
A:
The ice changes to a liquid then to a gas.