Fact 1: Bottleneck effect occurs when a population suddenly gets much smaller. Fact 2: Populations are large groups of individuals. Given the two facts above, what suddenly gets much smaller with the bottleneck effect?

OPTIONS:
- a lot of human deaths
- tectonic plates being pushed together
- our nearest star
- Decreased precipitation
- Inches or fractions of inches.
- large groups of individuals
- the wearing away of rock
- a hemisphere is tilted away from the sun

Answer: large groups of individuals

Fact 1: Aflashlight requires a source of electricity to produce light. Fact 2: Electric energy is stored in batteries. Given the two facts above, a flashlight requires what to produce light?

OPTIONS:
- batteries
- sunlight
- buttons
- calcite
- coils
- adding heat
- heat energy
- plastic

Answer: batteries

Fact 1: Heating salt water causes the water to evaporate while the salt remains. Fact 2: Evaporation is the change of state from a liquid to a gas. Given the two facts above, heating salt water causes the water to do what while the salt remains?

OPTIONS:
- change into a solid
- freeze
- change into a liquid
- rapid expansion
- flow of electrons
- change into a gas
- chemical reaction
- It gets heated up

Answer: change into a gas

Fact 1: Plants use unsaturated fatty acids to store energy. Fact 2: Among the unsaturated fatty acids are compounds with one, two or three double bonds. Given the two facts above, plants use what type of compounds to store energy?

OPTIONS:
- thermal insulators
- It helps them survive
- during the day
- spring, summer, autumn, winter
- compounds with double bonds
- hydrogen and oxygen
- Something with exactly eight protons
- it helps plants in growing

Answer:
compounds with double bonds