Problem:OPTIONS:
- DDT
- More algae
- More fine particles
- smog
- urea
- Water
- Oil
- gas

Fact 1: Oil is formed by layers of sediment pushing down on decomposing algae. Fact 2: Earthy sediment of fine particles of rock and soil suspended in and carried by water. Given the two facts above, what is created when fine particles press down on algae?
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A: Oil

Problem:OPTIONS:
- squids
- humans
- h2o
- trout
- octopus
- insects
- ducks
- fish

Fact 1: Webbed feet are used for moving faster through water by aquatic animals. Fact 2: Ducks are aquatic birds. Given the two facts above, what uses webbed feet for moving faster through water?
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A: ducks

Problem:OPTIONS:
- increase lung capacity
- increase stamina
- Abnormal cell growth
- kill them
- hyperthyroidism
- harmful substances
- decrease stamina
- decrease health problems

Fact 1: Smoking tobacco decreases stamina. Fact 2: Tobacco is grown for cigarette factories. Given the two facts above, smoking cigarettes will do what?
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A: decrease stamina

Problem:OPTIONS:
- sleeping
- Electrical energy
- UVA and UVB rays
- heat energy
- electromagnetic energy
- diseases
- carbon poisoning
- Solar energy

Fact 1: If something is outside during the day then that something will receive sunlight. Fact 2: Sunlight is made of both UVA and UVB rays. Given the two facts above, what will an object receive if it's outside during the day?
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A:
UVA and UVB rays