Q: Fact 1: Thick fur can be used for keeping warm. Fact 2: Mammals have warm blood, and fur or hair, and breathe air. Given the two facts above, what do mammals keep warm with?

OPTIONS:
- fats
- ears
- skulls
- Limbs
- food
- tails
- tissue
- hair

A: hair

Q: Fact 1: Cancer genes can be inherited. Fact 2: Inherited characteristics are passed on by our genes. Given the two facts above, cancer genes are an example of the type of thing that can be passed on through:?

OPTIONS:
- people
- blood exposure
- massive damage
- viruses
- Plant reproduction
- contagious
- reproduction
- humans

A: reproduction

Q: Fact 1: Increasing heat causes thermal expansion. Fact 2: Thermal fatigue cracking is notably different than thermal expansion damage. Given the two facts above, what can cause fatigue?

OPTIONS:
- cigarettes
- Dehydration
- expansion
- Pollution
- influenza
- hormones
- sweating
- smoking

A: expansion

Q: Fact 1: Having no natural predators increases population size. Fact 2: With an increase in population there is an increase in expenditures. Given the two facts above, what does having no natural predators increase?

OPTIONS:
- Animal survival
- in the frog family
- fur and fat
- scarce resources
- hyperthyroidism
- competition
- food and shelter
- expenditures

A:
expenditures