Which of the following is an example of how a scientist might use a model?
question 5 options:
stopwatches measure the amount of time it takes for a swimmer to go one lap in the pool.
a saw is used to cut a board in half.
marbles placed inside a hollow sphere are used to describe protons in a nucleus.
a telescope is used to see the moons orbiting jupiter.

Which class of molecules contains the amino group, nh2 (a) sugars (b) water (c) proteins (d) hydrocarbons

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs

In a vegetable garden 45 bean plants have been eaten by deer 5 are untouched what is the frequency of bean plants in the garden that have been eaten?