5. What is used in measuring motion?

A. distance
C. reference point
B. french
D. length

6. Which of the following units is used for measuring distance?

A. seconds
B. hour
C. liter
D. kilometer

7. Why do we need to use the metric system of measurement?

A. because it is used by many scientist B. because it is important to describe motion
C. because it is necessary to describe movement
D. because it is easier to understand each other's data

8. Why do we need to use tools for measuring length or distance?

A. to have accurate data
B. to be familiar with the use of each tools
C. to have an estimated measurement
D. to have an experience in using measuring tools

9. What do you call the object use as comparison to a moving object?

A motion
C. point
B, reference
D. reference point​