Download Study Guide 2009 m,v,d,chem,phys change

Name: ________________________
Study Guide
Tentative Test Date: November 20th (Friday)
(I may give the test on Friday, December 4th if I believe that the students need more
exposure to these concepts.)
1. What is mass? (Do not confuse mass with weight: weight is the measure of the effect
(pull) gravity has an object. The strength of gravity is different from planet to planet, but
the MASS NEVER CHANGES.)
2. What is volume?
3. What is weight?
4. What is density?
______ 5.
D.
F.
G.
H.
How can you measure the volume of an irregularly-shaped solid object?
Use a balance scale
D = M/V
Liquid displacement
LxWxH
______6. Suppose that you have 3 pure solid copper balls, each one is a different
size. One is the size of a pea, another is the size of a marble, and the third one is the
size of a golf ball. Which measurement would be the same for all 3 copper balls:
volume, mass, weight, density? __________________
______ 7.
A.
B.
C.
D.
Which instrument is used to measure mass?
Meter stick
Balance scale
Graduated Cylinder
Spring Scale
8. Suppose that each side of a cube measures 3 cm. What is the volume? ________
9. A graduated cylinder has 20 ml of water in it. A small rock is dropped into the
cylinder and the water is now up to the 27 ml line.
What is the volume of the rock? _________What is the volume of the water? ________
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10. Fill in the blanks with the correct word (volume, weight, mass)

The balance scale is used to measure ___________________

The spring scale is used to measure ____________________

A graduated cylinder and water are used to measure _________________
11. (2 pts) If you were to travel from the earth to the moon what would happen to your
mass and to your weight? Explain your answer.
12. (2 pts) How could equal volumes of different substances have different masses?
Answer: The volume is how much space the matter takes up. Suppose that there
are 2 blocks of equal size. One of the blocks has many molecules smashed together,
making the block very dense. The other block has fewer molecules smashed
together and is less dense. (Remember, it is still the same size as the other block).
The denser block will have more mass because it has more matter; the less dense
block has fewer molecules so it has less mass.
13. If an object is LESS dense than water will it FLOAT or SINK? ____________ (circle one)
14. Suzy Q. finds the density of 50 milliliters (ml) of corn syrup with his students. After
dividing the mass and volume, they arrive at a density of 1.4 grams per milliliter (g/ml).
What should be the density of 100ml of corn syrup?
100 g/ml
1.4 g/ml
50 g/ml
2.8 g/ml
15. How are mass and weight different? Choose TWO of the following:
mass measures the pull of gravity on an object
weight measures the pull of gravity on an object
weight is the amount of matter in an object
mass is the amount of matter in an object
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16. Which of the following can you conclude about density?
different liquids have the same densities
different solids have the same densities
some liquids can be more dense than some solids
17. A small box is 5 centimeters long, 2 centimeters wide, and 4 centimeters high. What
is its volume?
40 cubic centimeters
11 cubic centimeters
40 milliliters
11 milliliters
18. A bowling ball has a MASS of 5,000 grams on Earth. On the moon the mass will be:
more than 5,000 grams
less than 5,000 grams
5,000 grams
1/6 of 5000 grams
19. The paint on the metal of a car:
makes the car quieter; helps prevent a physical change, only for decoration
helps prevent a chemical change
20. A chemical reaction occurs if:
the molecules do not change and the substance stays the same
the compound undergoes a physical change
the molecules are rearranged and a new substance is formed
a compound resists any physical changes
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Identify each of the following as a Physical or Chemical Change.
Put a P next to Physical Changes Put a C next to Chemical Changes
21. Water evaporates. _________
22. A bicycle chain rusts. _________
23. Food is digested. _________
24. A piece of an apple rots on the ground. _________
25. Sugar dissolves in lemonade. _________
26. Eggs turn into an omelette. _________
27. A popsicle melts. _________
28. A glow stick starts to glow on Halloween. _________
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