[Q] Which of the following uses energy that comes from body heat?
Options:
- (A) kinetic energy
- (B) evaporation of perspiration
- (C) kinetic friction
- (D) evaporation of snow
- (E) Transfers energy
- (F) a rock rolling down a hill
- (G) a fire burning near a campsite
- (H) converting mass to energy
[A] Here's my solution: Evaporation of sweat uses energy, and the energy comes from body heat. Diaphoresis is a fancy medical term for perspiration or sweating. Evaporation of perspiration uses energy and the energy comes from body heat. The answer is (B).

[Q] What typically travel long distances?
Options:
- (A) slugs
- (B) snails
- (C) home bodies
- (D) manatees
- (E) supersonic
- (F) trains
- (G) humans
- (H) Cars
[A] Here's my solution: Migrants typically travel long distances. Manatees are a migrant species. Manatees typically travel long distances. The answer is (D).

[Q] Fungi are the only organisms that can decompose dead what?
Options:
- (A) fossils
- (B) legumes
- (C) trees
- (D) matter
- (E) amoeba
- (F) coal
- (G) elms
- (H) bamboo
[A] Here's my solution: Fungi are the only organisms that can decompose wood. Wood comes from trees. Fungi are the only organisms that can decompose dead trees. The answer is (C).

[Q] What kind of animal doesn't have a centralized nervous system?
Options:
- (A) dog
- (B) mammals
- (C) cows
- (D) bird
- (E) human
- (F) elephants
- (G) starfish
- (H) a fish
[A]
Here's my solution: Echinoderms lack a centralized nervous system. Echinoderms are represented by the starfish. Starfish lack a centralized nervous system. The answer is (G).