Wednesday, September 2, 2015

Unit 1 Review

1.   Draw a simple flow chart outlining the steps of the scientific method. Include what happens if the experiment does not agree with the hypothesis.

2. What are the metric units used to measure length/distance, mass, volume, temperature, and time? What are their abbreviations?

3. Write the following numbers in scientific notation.
A.    25,030,000
B.    0.000258
C.    34,003,000,000,000
D.    0.00000000314

4.  Do the following conversions.
A.     Convert 100 milliliters into liters.
B.     Convert 450 grams into milligrams.
C.     Convert 320 centimeters into meters.
D.     Convert 4 kilograms into grams.
E.     Convert 5,930 liters into milliliters.

5. How many significant figures are in the following numbers?
A.     422.002
B.     50.20
C.     50,000,000,000
D.     599
E.     93.0

6. Solve the following problems with answers with the correct number of significant figures
A.     10.5 * 22
B.     60.0 + 22.543
C.     533.215 – 255.01
D.     5586.251 / 5.2
E.     525 + 22.156
F.     22.2 * 562.12
G.     633.1 – 52.256

7. Are the following chemical or physical changes?
A.     Ice melting
B.     Gasoline burning
C.     Table salt (sodium chloride) dissolving in water
D.     Iron rusting
E.     Breaking a glass
F.     Protein being digested into amino acids

8. What are the three subatomic particles that atoms are made of and what are their charges?

9.   If an atom has twenty six protons, thirty neutrons, and twenty six electrons what is its atomic number? What is its atomic weight? What element is it? What is its symbol?

10. Which are heavier electrons or protons?

11. Are the following elements metals, nonmetals or semimetals?
A. Cobalt (Co)
B. Xenon (Xe)
C. Boron (B)
D. Calcium (Ca)
E. Oxygen (O)
F. Tungsten (W)

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