Fact 1: Harming an animal species has a negative impact on the population size of that species. Fact 2: Pollution is usually harmful to one or more species of animal or plant. Given the two facts above, what is usually harmful to the population size of a species?

OPTIONS:
- Pollution
- reproduction
- viruses
- disease
- habitat
- ecosystems
- influenza
- deforestation

Answer: Pollution

Fact 1: All life relies on a relatively narrow range of pH, or acidity. Fact 2: If the pH level is higher or lower, aquatic life is endangered. Given the two facts above, what happens to aquatic life if acidity is higher or lower than a narrow range?

OPTIONS:
- Plant growth is reduced
- They may not survive.
- Aquatic life sinks
- harm them
- It is endangered
- Damages them
- Aquatic life moves to dry land
- Aquatic life flourishes

Answer: It is endangered

Fact 1: Asolution is formed by one substance being dissolved in another substance. Fact 2: Most substances can exist as a solid, liquid or gas. Given the two facts above, a solution is formed when one of these gets dissolved into another one of these?

OPTIONS:
- Calcium carbonate
- Condensation
- near the shoreline
- solid, liquid, gas
- a hydraulic system
- evaporation
- Light passing through water
- chemical changes

Answer: solid, liquid, gas

Fact 1: Energy is passed up a food chain or web from lower to higher trophic levels. Fact 2: Plants are always at the bottom of the food chain or web. Given the two facts above, at what trophic level is a plant?

OPTIONS:
- lower trophic level
- higher trophic level
- the body's largest organ
- vegetation
- Something that is self-aware
- it needs them
- middle trophic level
- highest trophic level

Answer:
lower trophic level