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Unit 4-5
Test Description: A review of chemical and physical changes
Instructions: Answer all questions to get your test result.
1) Lead is a very dense metal. Which is the best use for this metal?
A
cell phones
B
floatation device
C
sinkers used when fishing
D
golf clubs
2) Which physical property of metals makes an iron frying pan good to use on a cooking stove?
A
luster
B
magnetism
C
conductivity
D
malleability
3) The element selenium is a solid nonmetal. What physical property can you expect it to have?
A
poor conductor
B
shiny luster
C
no definite shape
D
magnetism
4) Which of the following is evidence of a chemical change?
A
density
B
boiling point
C
ability to burn
D
malleability
5) Hydrochloric acid is added to a beaker containing a piece of zinc. As a result, zinc chloride
A
temperature change
B
color change
C
production of precipitate
D
production of a gas
6) Sam had two golf balls. One was a normal solid golf ball while the other was a plastic
A
the normal golf ball is more dense
B
the density is the same
C
the plastic golf ball with holes is more dense
D
none of the above
7) Sulfur (S) is a yellow solid that is not shiny and crumbles easily.
A
both are yellow
B
some metals are ductile
C
both are solids
D
both are on the periodic table
8) A teacher puts two tablets in a glass of water. The teacher stirs the water with a spoon until
A
the spoon
B
the bubbles
C
the glass
D
the tablets
9) Students are given a sample of an unknown material. They want to perform tests to determine its identity. Which test is MOST likely to change the sample into a new material?
A
heating it until it melts
B
burning it in a flame
C
dissolving it in water
D
grinding it into powder
10) A student finds that the mass of 25 mL of an unknown liquid is 100 grams. What is the density?
A
2,500 g/mL
B
4 g/mL
C
0.25 g/mL
D
125 g/mL
*select an answer for all questions
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