Problem:OPTIONS:
- cracks
- crust
- Newton
- roots
- pan
- soil
- potash
- biome

Fact 1: Soil is formed by weathering. Fact 2: Over time, the slow processes of weathering and erosion can turn large rocks into sand. Given the two facts above, what is formed by erosion processing large rocks?
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A: soil

Problem:OPTIONS:
- shrimp
- orchids
- gecko
- sheep
- Schwinn
- jellyfish
- praying mantis
- Birds

Fact 1: Invertebrates are animals that lack a vertebral column, or backbone. Fact 2: Geckos have backbones and are reptiles. Given the two facts above, which of the following animals is NOT an invertebrate?
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A: gecko

Problem:OPTIONS:
- sound of water
- thickness of food
- density of substances
- Temperature
- all liquids
- creaminess of texture
- objects that have mass
- air mass over Earth's surface

Fact 1: Ameasuring cup is used for measuring the volume of substances. Fact 2: For any substance, the density is a measure of the mass of a unit volume of that substance. Given the two facts above, a measuring cup is used for measuring the what?
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A: density of substances

Problem:OPTIONS:
- our planet
- sweat
- swamp vegetation
- ocean
- NaCl
- aqueous solution
- solid, liquid, gas
- global ecosystems

Fact 1: Freshwater biomes have water that contains little or no salt. Fact 2: Biomes are global ecosystems. Given the two facts above, what has freshwater that contains little or no salt?
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A:
global ecosystems