Fact 1: Riding a bike does not cause pollution. Fact 2: Pollution is anything that spoils the environment. Given the two facts above, what does not spoil the environment?
OPTIONS:
- Operating a factory
- Driving a car
- Riding a bike
- food and shelter
- hydrate their cells
- lowered energy cost
- Burning a fire
- peachleaf willow

Answer: Riding a bike

Fact 1: Lipids may consist of fatty acids alone, or they may contain other molecules as well. Fact 2: Lipids Lipids are also composed of carbon, oxygen and hydrogen. Given the two facts above, what can fatty acids be combined with, in addition to carbon and oxygen?
OPTIONS:
- Sodium
- Energy.
- glucose
- Carbon Dioxide
- Fuel cells
- Uranium
- Hydrogen
- Energy

Answer: Hydrogen

Fact 1: Roundworms reproduce sexually. Fact 2: Nearly all species of roundworms reproduce by laying eggs. Given the two facts above, how do roundworms have offspring?
OPTIONS:
- more abundant
- rapid expansion
- Plants growth
- survive
- laying eggs
- competition
- it needs them
- fertile

Answer:
laying eggs