Fact 1: Powering an electrical device with a battery requires a path for electricity to flow through a closed circuit. Fact 2: Batteries are electro-chemical devices. Given the two facts above, an electrical device can be powered with what device?
OPTIONS:
- direct energy
- electrically
- broken
- electroverse
- hydrogen and oxygen
- operated
- electromagnetic energy
- electro-chemical

Answer: electro-chemical

Fact 1: Echinoderms have a unique water vascular system with tube feet. Fact 2: Sea stars use hundreds of tube feet. Given the two facts above, sea stars use a unique water vascular system with what?
OPTIONS:
- growth
- a ray
- feet
- oxygen
- porous
- energy
- Light
- volume

Answer: feet

Fact 1: Plastics are made from petroleum and produce toxic waste. Fact 2: Plastic is a big contributor to landfill waste. Given the two facts above, products made from what are a big contributor to landfill waste?
OPTIONS:
- burning coal
- acetic acid
- tin
- hydrocarbons
- brass
- Pesticides
- petroleum
- recyclables

Answer:
petroleum