Fact 1: Bacteria in soil convert atmospheric nitrogen into a form usable by plants. Fact 2: Plants have to have nitrogen to grow. Given the two facts above, what do plants need to grow?

OPTIONS:
- energy
- sunlight
- nutrients
- bacteria
- lifting
- Energy.
- muscle
- darkness

Answer: bacteria

Fact 1: Arefrigerator is used for keeping food fresh for a long period of time. Fact 2: Cold temperatures help food stay fresh longer. Given the two facts above, what does a refrigerator do?

OPTIONS:
- Keeps food cold
- Cooks food
- Decrease bodily water
- Spoils food
- Keeps food warm
- staying warm
- lowered energy cost
- adding heat

Answer: Keeps food cold

Fact 1: Scales are used for protection by scaled animals. Fact 2: Generally, reptiles are thought of as being land dwelling animals with scales. Given the two facts above, reptiles have what for protection?

OPTIONS:
- shells
- cartilage
- the skin
- hair
- fur
- scales
- keratin
- beaks

Answer: scales

Fact 1: Gills are used for breathing water by aquatic animals. Fact 2: All fish have gills . Given the two facts above, what do all fish breathe?

OPTIONS:
- oxygen
- lipids
- air
- keratin
- water
- seaweed
- mud
- lava

Answer:
water