Physical Science—Grade 9
Unit ONE review sheet
1. List and know the symbols for the basic units of mass, volume and length.
Unit
symbol
Mass =
Volume=
Length =
What other units for mass and volume have you used so far? (do you know what
mL, cc, cm3 and kg are?)
2. List and give the number values and symbols for the metric prefixes used in class.
Suggestion--draw your jump chart from memory. Use flash cards.
Number value
prefix
symbol
1,000,000,000,000
1,000,000,000
0.000 000 001
10
0.1
100
0,001
0.01
1000
1 000 000
0.000001
0.000000001
4. Measure and draw lines to the nearest 0.1 of a centimeter.
suggestion—examine a cm ruler
5. List the steps of the scientific method of problem solving in order.
Know what happens during each step. (Notes, problem/hypothesis
worksheets, gold sheet)
 write Procedures
 Record data
 Prediction
 Hypothesis
 conclusion
 Perform experiments
 Observe
(put in order)
NOTE: I will give you a situation—you will write a problem, hypothesis and prediction for it—see
the worksheet on problem and hypothesis correlation and your toy labs.
6. Given the description of an experiment, identify control variables, dependent variable and independent
variable
Experiment: Two 600mL beakers are filled with 400mL of water each. Four strawberry twizzlers are
selected from a bag. The mass of each is measured and recorded. Two are placed in cold water
15oC. Two more are put in water that is 90oC. Every hour, the mass of the twizzlers is determined.
After 8 hours, the warm water twizzlers have disappeared. The cold water twizzlers had lost 0.9g of
mass.
control variables:
independent variable:
dependent variable:
suggestion: review all of your experiment examples and warm ups, notes on variables, dogged
investigation
7. Given examples, recognize the difference between observation and inference. (notes)
In warm water Twizzlers dissolve in five minutes. In cold water, it takes 10 minutes.
The person running the experiment likes strawberry twizzlers
8. State the difference between a law and a theory , Text, page 12 (nature of science
study guide)
9. How are science and technology related? Text, page 12 (nature of science study guide)
10. Define and tell the difference among mass, volume and density.
11. Know the equation that solves for density (D = M )
V
12. Given mass and volume, come up with a number value for density and the correct units
(g/cc) (“Density Table” )
13. Describe how the mass of an object is determined and what instrument is used (balance)
to find it.
14. Read a triple beam balance.(See page 2 of mass packet)
15. Describe how you would determine the volume of:
A regular solid (like a cube)
An irregular solid (like a fishing sinker)
A liquid
(see volume packet)
16. Can you identify: beaker; graduated cylinder, cm ruler; meter stick; balance?
17. On a ruler/meter stick, can you identify cm and mm?
18. What is the density of fresh water?
tell us (“Still Dense About Density?”)
If objects float or sink in fresh water, what does this