Problem: OPTIONS:
- stays constant
- Temperature
- energy
- Energy.
- decreases
- nothing
- Evaporation
- increases
Q: Fact 1: If gas is heated then that gas will expand. Fact 2: If a material is heated, it expands and the density decreases. Given the two facts above, what happens to the density of a gas when heated?
Answer: decreases

Problem:OPTIONS:
- barnacles
- animals
- feces
- molecules
- fungi
- cows
- insects
- planets

Fact 1: Some arthropods have special excretory structures. Fact 2: Insects are the largest group of arthropods. Given the two facts above, what can have special excretory structures?
****
A: insects

Fact 1: Carbon dioxide concentrations in the air have increased over the last decade dramatically. Fact 2: CO 2 is carbon dioxide. Given the two facts above, what has increased in the air dramatically over the last decade?
OPTIONS:
- oil
- sugar
- coal
- Cars
- H2O
- CO 2
- He
- O2
CO 2

Fact 1: An aquatic animal requires great amounts of water to survive. Fact 2: Dolphins are an aquatic mammal closely related to whales and porpoises. Given the two facts above, what requires great amounts of water to survive?
OPTIONS:
- a tortoise
- leeches
- a dolphin
- a lizard
- a snake
- trout
- mussels
- amphibians

Answer: a dolphin

Question: Fact 1: Sweat wets the skin, and when it evaporates, it cools the body. Fact 2: Perspiration There are about 2 million sweat glands in the average human body. Given the two facts above, what wets the skin, and when it evaporates, it cools the body?
OPTIONS:
- heat energy
- acetic acid
- Air conditioner
- salt and water.
- Skin oil
- water vapor
- Perspiration
- A towel
Answer: Perspiration

input: OPTIONS:
- With their voice
- Chemical energy
- mechanical waves
- With their eyes
- during the day
- With their movements
- With their hormones
- electrically Now, answer this question: Fact 1: Ants communicate with chemicals called pheromones. Fact 2: Pheromones are insect hormones. Given the two facts above, how do ants communicate?
A:
output:
With their hormones