Q: Answer the question

Two processes are involved in the formation of a sand dune. Which two processes best describe how a sand dune forms?
OPTIONS:
- wind erosion then deposition
- plate movement then deposition
- wind erosion then water erosion
- water erosion then plate movement

A: wind erosion then deposition

Q: Answer the question

During a lab investigation a scientist heats a solid substance. The scientist observes that the solid has two different melting points. The scientist is able to separate the two resulting liquids. Which statement best classifies the original solid substance?
OPTIONS:
- It was an atom.
- It was a mixture.
- It was an element.
- It was a compound.

A: It was a mixture.

Q: Answer the question

Which part of a plant produces the seeds?
OPTIONS:
- flower
- leaves
- stem
- roots

A:
flower