Q: What is the first step in designing a product? OPTIONS:
- model a solution
- communicate the solution
- identify the need or want
- build a prototype
A: identify the need or want

Q: As the population of small fish in a lake decreases, the population of large fish that depend on the small fish for food will OPTIONS:
- reproduce faster
- begin to produce their own food
- decrease in number
- increase in number
A: decrease in number

Q: The main function of hormones in the human body is to OPTIONS:
- identify and destroy microbes
- regulate body functions
- transport blood to cells
- store energy
A: regulate body functions

Q: Which of the following is a similarity 20 between x-ray waves and sound waves? OPTIONS:
- Both transfer energy.
- Both require a vacuum.
- Both have the same speed.
- Both have the same frequency.
A:
Both transfer energy.