Q: Fact 1: When metal conducts heat , that metal expands. Fact 2: Steel is the most useful of metals. Given the two facts above, what expands when it conducts heat? | OPTIONS:
- lipids
- fabric
- glass
- Energy.
- steel
- cement
- a prism
- plastic
A: steel

Q: Fact 1: The Earth being tilted on its rotating axis causes seasons. Fact 2: Latitude and season cause temperature variations. Given the two facts above, what causes yearly temperature variations? | OPTIONS:
- earth's rotation
- scattered light
- earth's bend on rotating axis
- exposure to cold
- depress neuronal excitability
- earth's tilt on rotating axis
- wind and erosion
- earth's tilt on rotating half
A: earth's tilt on rotating axis

Q: Fact 1: Slime molds are fungus-like protists commonly found on rotting logs and compost. Fact 2: An obvious sign of mature logs is the appearance of mushrooms. Given the two facts above, where are mushrooms found? | OPTIONS:
- ocean
- mountains
- vegetation
- loose dirt
- limestone
- compost
- metal
- loose soil
A: compost

Q: Fact 1: Plastics are made from petroleum and produce toxic waste. Fact 2: Plastic bags are made from non-renewable petroleum resources. Given the two facts above, what comes from non-renewable resources? | OPTIONS:
- plastic bags
- renewable goods
- burning coal
- emissions
- carbon dioxide
- organic plants
- paper
- Sulfur dioxide
A: plastic bags