Q: Fact 1: Acavern is formed by carbonic acid in groundwater seeping through rock and dissolving limestone. Fact 2: Erosion by acid solutions is only one way that caves form. Given the two facts above, how are caves formed?

OPTIONS:
- less water
- eruptions
- Water expanding
- storing water
- volcanoes
- by humans
- chemical erosion
- hard outer covering

A: chemical erosion

Q: Fact 1: Chemical weathering causes iron in rock to oxidize. Fact 2: Iron oxide gives a rusty red color to sedimentary rocks. Given the two facts above, what gives a rusty red color to sedimentary rocks?

OPTIONS:
- food coloring
- The area was once underwater
- chemical weathering
- remains of prehistoric life
- deoxyribonucleic acid
- sea urchins
- dirt
- earthquakes

A: chemical weathering

Q: Fact 1: Atape measure is used to measure length. Fact 2: Lengths are given in centimeters. Given the two facts above, what measure centimeters?

OPTIONS:
- weight
- tape measure
- triceps
- in the frog family
- kilograms
- bottom of feet
- density
- layers of fat

A: tape measure

Q: Fact 1: Most protists have motility. Fact 2: Protists are single-celled microscopic organisms like amoebae. Given the two facts above, _ have motility?

OPTIONS:
- amoebae
- plants
- properties
- minerals
- fungi
- movement
- hydration
- complex

A:
amoebae