Q: Because of their reactivity, we do not find most representative metals as free elements where? A:

OPTIONS:
- in water
- in the atomospher
- underground
- in nature

Answer: in nature

Problem: OPTIONS:
- a mixture
- homogeneous matter
- a liquid
- an element
Q: Q: What is a pure substance called? A:
Answer: an element

Problem:OPTIONS:
- liver
- brain
- proteins
- bloodstream

Q: Oxygenated air, taken in during inhalation, diffuses across the surface of the lungs into the what? A:
****
A: bloodstream

Q: Why are continents unable to be pushed down into the mantle by plate boundaries? A:
OPTIONS:
- gravity
- surface tension
- density
- buoyancy
buoyancy

Q: How many directions can ions flow along the axon? A:
OPTIONS:
- two
- six
- three
- one

Answer: one

input with options: Q: What term is used to describe a cross between two individuals that have different traits? A:
OPTIONS:
- assimilation
- fraternization
- purebreed
- hybridization
output:
hybridization