Problem:OPTIONS:
- plant
- rocks
- crust
- grains
- money
- sand
- matter
- soils

Fact 1: Sand dunes are formed by the wind transporting and depositing sand. Fact 2: Desert Dunes Desert sand dunes occur in an amazing diversity of forms. Given the two facts above, deserts are a location where wind transport can deposit what?
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A: sand

Problem:OPTIONS:
- hormones
- amoebae
- weight
- motion
- an object
- voltage
- symptoms
- motility

Fact 1: Phase changes do not change mass. Fact 2: Weight and mass mean the same thing. Given the two facts above, phase changes do not change?
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A: weight

Problem:OPTIONS:
- Rainbows
- photons
- patch reefs
- an object
- Clouds
- coral reefs
- The light disappears
- Lightning

Fact 1: Arainbow is formed by refraction of light by separating light into all different colors. Fact 2: Rainbows have colors because water refracts different wavelengths of light slightly differently. Given the two facts above, what is formed when light hits water and refracts in different wavelengths?
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A: Rainbows

Problem:OPTIONS:
- good
- neutral
- positive
- reduced heat
- erosion
- negative
- protect them
- uncontrolled

Fact 1: Landfills have a negative impact on the environment. Fact 2: Most garbage is buried in landfills. Given the two facts above, most buried garbage has what impact on the environment?
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A:
negative