Chemistry In Our Lives

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Question 1
Free
Multiple Choice

Water,H2O,is an example of a(n) ________ .

Choose correct answer/s
A

chemical

B

solid

C

wave

D

electric charge

E

element

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Question 2
Free
Multiple Choice

In this list,which substance can be classified as a chemical?

Choose correct answer/s
A

salt

B

sleep

C

cold

D

heat

E

temperature

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Question 3
Free
Multiple Choice

One example of a chemical used in toothpaste is ________ .

Choose correct answer/s
A

chlorine

B

sulfur

C

carbon dioxide

D

calcium carbonate

E

sugar

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Question 4
Free
Multiple Choice

Which of the following is not a chemical?

Choose correct answer/s
A

salt

B

water

C

light

D

carbon dioxide

E

sugar

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Question 5
Free
Multiple Choice

Sodium fluorophosphate is a chemical used in toothpaste to ________ .

Choose correct answer/s
A

make the paste white

B

disinfect the toothbrush

C

keep the paste from spoiling

D

remove plaque

E

strengthen tooth enamel

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Question 6
Multiple Choice

When a part of the body is injured,substances called ________ are released.

Choose correct answer/s
A
aspirins
B
pain relievers
C
nitrogen oxides
D
chlorofluorocarbons
E
prostaglandins
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Question 7
Multiple Choice

The production of smog from NO gas requires ________ .

Choose correct answer/s
A
nitrogen
B
chlorine
C
water
D
oxygen
E
CFCs
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Question 8
Multiple Choice

Titanium dioxide is a chemical used in toothpaste to ________ .

Choose correct answer/s
A
make the paste white
B
disinfect the toothbrush
C
keep the paste from spoiling
D
remove plaque
E
strengthen tooth enamel
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Question 9
Multiple Choice

Which of the following is a chemical?

Choose correct answer/s
A
sugar
B
heat
C
light
D
noise
E
a wave
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Question 10
Multiple Choice

You notice that there is more traffic between 8 and 9 in the morning.This would be a(n) ________ .

Choose correct answer/s
A
observation
B
hypothesis
C
experiment
D
theory
E
all the above
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Question 11
Multiple Choice

There is more traffic between 8 and 9 in the morning because most people start work at 9.This would be a(n) ________ .

Choose correct answer/s
A
observation
B
hypothesis
C
experiment
D
theory
E
all the above
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Question 12
Multiple Choice

One way to enhance your learning in chemistry is to ________ .

Choose correct answer/s
A
study a little every day
B
form a study group
C
go to office hours
D
be an active learner
E
all the above
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Question 13
Multiple Choice

In order to enhance your learning in chemistry,you should not ________ .

Choose correct answer/s
A
study a little every day
B
form a study group
C
go to office hours
D
be an active learner
E
wait until the night before the exam to study
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Question 14
Multiple Choice

In the number 12.345,the 4 is in the ________ place.

Choose correct answer/s
A
tens
B
ones
C
tenths
D
hundredths
E
thousandths
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Question 15
Multiple Choice

In the number 12.345,the 1 is in the ________ place.

Choose correct answer/s
A
tens
B
ones
C
tenths
D
hundredths
E
thousandths
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Question 16
Multiple Choice

In the number 12.345,the 3 is in the ________ place.

Choose correct answer/s
A
tens
B
ones
C
tenths
D
hundredths
E
thousandths
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Question 17
Multiple Choice

The product of (-4)× (-5)is ________ .

Choose correct answer/s
A
-20
B
+20
C
-1
D
+1
E
0
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Question 18
Multiple Choice

For the equation 4x + 2 = 10,x equals ________ .

Choose correct answer/s
A
8
B
12
C
3
D
2
E
-2
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Question 19
Multiple Choice

For the equation -10 - (-4)= ________ .

Choose correct answer/s
A
6
B
-6
C
14
D
-14
E
4
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Question 20
Multiple Choice

12 is what percent of 36?

Choose correct answer/s
A
3%
B
30%
C
33%
D
330%
E
12%
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