Fact 1: Insulated material can be used for keeping warm. Fact 2: Hair is a natural insulator whether the it is warm or cool. Given the two facts above, what can keep you warm?

OPTIONS:
- toenails
- warmth
- skin
- nails
- wings
- fingers
- fur
- hair

Answer: hair

Fact 1: Evaporation of sweat uses energy, and the energy comes from body heat. Fact 2: Sweat glands pump perspiration through pores. Given the two facts above, where does the energy to evaporate perspiration come from?

OPTIONS:
- heat produced
- The Sun
- goosebumps
- electrical energy
- kinetic force
- body heat
- heat energy
- energy

Answer: body heat

Fact 1: Lungs are used for breathing air by land animals. Fact 2: Land Animals Land animals have four limbs. Given the two facts above, lungs are used for breathing air by animals with what?

OPTIONS:
- unidirectional
- exoskeleton
- contracting
- fins
- four limbs
- gills
- kinetic energy
- eight eyes

Answer: four limbs

Fact 1: Immunity results from immunization. Fact 2: Immunization with vaccine is effective. Given the two facts above, what can vaccines do?

OPTIONS:
- cause euphoria
- major threat to health
- it protects them
- protect plants
- Keep someone from disease
- cause a disease
- cause a vasectomy
- rapid expansion

Answer:
Keep someone from disease