Fact 1: Sonar is used to find the location of an object. Fact 2: Sonar bounces sound waves off the bottom of the ocean. Given the two facts above, what can be bounced off the ocean floor to located objects?

OPTIONS:
- soundwaves
- rubber balls
- submarines
- whale bones
- electricity
- rays or beams
- light
- satellites

Answer: soundwaves

Fact 1: Melting means changing from a solid into a liquid by adding heat energy. Fact 2: Ice is the solid form of water. Given the two facts above, what changes ice to water by adding heat energy?

OPTIONS:
- mussels
- melting
- freezing
- fertilization
- storms
- boiling
- engines
- condensation

Answer: melting

Fact 1: Steroid hormones are made of lipids, such as phospholipids and cholesterol. Fact 2: Steroids Steroids are lipids derived from cholesterol. Given the two facts above, what are steroids made of?

OPTIONS:
- an anion
- glucose
- lmestone
- Acids
- Energy.
- lipids
- reduce
- Energy

Answer: lipids

Fact 1: Mechanical weathering is when rocks are broken down by mechanical means. Fact 2: Water is a mechanical weathering force. Given the two facts above, what weathers rocks?

OPTIONS:
- soil
- streams
- a delta
- calcite
- erosion
- water
- grass
- the sun

Answer:
water