Fact 1: Bacteria cause food to spoil. Fact 2: Milk was loaded with bacteria that quickly spoiled, making it undrinkable. Given the two facts above, what can make milk undrinkable?
OPTIONS:
- evaporation
- Enzymes
- boiling
- glycogen
- liquid
- nutrients
- bacteria
- vaporization

Answer: bacteria

Fact 1: Echinoderms have a unique water vascular system with tube feet. Fact 2: Each starfish arm is lined with tube feet. Given the two facts above, where does a starfish have its water vascular system?
OPTIONS:
- salt and water.
- Chlorophyll
- the environment
- in its arms
- on the rocks
- in its eyes
- Epidermis
- in the ocean

Answer: in its arms

Fact 1: Friction causes an object to lose energy. Fact 2: An object loses kinetic energy each time it hits a non-elastic surface. Given the two facts above, what does friction cause a mass to lose?
OPTIONS:
- support
- Energy
- nutrients
- weight
- contents
- Collagen
- height
- cartilage

Answer:
Energy