Galileo and Units Review

5. The foundation for the International System of Measurements comes from seven _______.
8. The SI unit for time is the _______.
10. The SI unit for the amount of something is the ______.
11. The number portion of a physical quantity is called ______.
13. The SI unit for mass is the ______.
14. In the absence of air resistance, objects experience a _______ acceleration as they fall.
15. Galilean ______ states that physical is the same in all nonaccelerating reference frames.
17. The SI unit for electric current is the _______.
18. The SI unit for thermodynamic temperature is the ______.
19. Galileo used a _______ experiment to prove heavier objects did not fall faster than lighter ones.

1. A __________ is anything that can be measured and described using a number and unit.
2. All the units in the SI system are defined from seven fundamental ______.
3. The scientific community worldwide uses _______ when taking measurements to prevent confusion and potential disaster.
4. The relationship between speed and time is ______ for falling objects.
6. A physical quantity that only needs a number and unit to completely describe it.
7. Galileo determined that for falling objects, distance was proportional to time _______.
9. A physical quantity that requires a number, and unit, and a direction to describe it completely.
10. The SI unit for length is the ______.
12. ______ units are composed of two or more base units.
14. Galileo believed a force was necessary to ______ and object's motion, not sustain it.
16. According to Galileo, the all objects accelerate at the same rate in a ______.