Fact 1: Cutting down trees has a negative impact on an ecosystem. Fact 2: Students take a field trip to an ecosystem to observe the homes of animals in natural habitats. Given the two facts above, cutting down trees has a what on the homes of animals in natural habitats?

OPTIONS:
- neutral impact
- deforestation
- positive impact
- no impact
- threatened
- Decrease bodily water
- massive damage
- negative impact

Answer: negative impact

Fact 1: Photosynthesis means producers convert from carbon dioxide, water, and solar energy into carbohydrates for themselves. Fact 2: Water is released by the processes of photosynthesis and respiration. Given the two facts above, what is released by energy conversion?

OPTIONS:
- photons
- waves
- A drug.
- Light
- oxygen
- heat
- water
- energy

Answer: water

Fact 1: Sound can be used for communication by animals. Fact 2: Sound Sound waves are mechanical waves. Given the two facts above, what can be used for communication by animals?

OPTIONS:
- books
- Electrical energy
- electromagnetic energy
- nails
- chemical messengers
- mechanical waves
- encoded information
- ice

Answer: mechanical waves

Fact 1: Cells are programmed to divide only a set number of times. Fact 2: Apoptosis is programed cell death. Given the two facts above, cells divide only a set number of times then experience what?

OPTIONS:
- apoptosis
- Dehydration
- Leptospirosis
- illness
- fever
- relocation
- anemia
- competition

Answer:
apoptosis