Problem:OPTIONS:
- Sediment
- Fresh water
- loose soil
- swamp vegetation
- mussels
- storing water
- body water
- carbon dioxide

Fact 1: Damming a river can cause a lake to form. Fact 2: Water in the lakes is fresh, cool and transparent. Given the two facts above, what is the thing that is created by damming a river made of?
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A: Fresh water

Problem:OPTIONS:
- h2o
- Lobsters
- violence
- pigeons
- gases
- omnivores
- bullfrogs
- humans

Fact 1: Competition may cause animals to fight towards members of their own species. Fact 2: Humans are animals too. Given the two facts above, what species may be caused to fight each other by competition?
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A: humans

Problem:OPTIONS:
- Helps blend in
- nutrients
- Helps them run fast
- Protect from heat
- Protect from cold
- heat energy
- adding heat
- hard outer covering

Fact 1: Thick fur can be used for keeping warm. Fact 2: With a thick fur coat and 4 inches of fat a bear stays warm. Given the two facts above, what does thick fur help a bear with?
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A: Protect from cold

Problem:OPTIONS:
- planets
- wind
- sun's heat
- dust
- gravity
- asteroids
- speed
- forces

Fact 1: Gravity pulls objects towards planets. Fact 2: By the simplest definition, a planet is a large object that orbits a star. Given the two facts above, what pulls objects towards large objects that orbit stars?
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A:
gravity