January 28, 2015

Homework Help: science

Posted by jack on Monday, December 13, 2010 at 6:10pm.

Chapter 1 & 2 Review Questions
1. Compare and Contrast the two main branches of physical science.

2. Distinguish between scientific laws and scientific theories.

3. Describe the steps of the scientific method.

4. Explain the objective of a consistent system of units, and identify the SI units for length, mass, and time.

5. Express each of the following quantities using an appropriate SI prefix before the proper units.
a. 0.004 g
b. 75,000 m

6. Write the following measurements in scientific notation:
a. 0.005 km
b. 65,900,000 m

7. Do the following calculations, and write your answers in scientific notation:
a. 37,000,000 A x 7,100,000 s
b. 0.000312 m3 486 s

8. Round the following measurements to the number of significant figures shown in parentheses:
a. 7.376 m (2)
b. 48,794 km (3)

9. Explain why mass and weight are not the same. How would the units in which they are measured differ?

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