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

chemical

solid

wave

electric charge

element

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Question 2

Free

Multiple Choice

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

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salt

sleep

cold

heat

temperature

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Question 3

Free

Multiple Choice

One example of a chemical used in toothpaste is ________ .

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chlorine

sulfur

carbon dioxide

calcium carbonate

sugar

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Question 4

Free

Multiple Choice

Which of the following is not a chemical?

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salt

water

light

carbon dioxide

sugar

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Question 5

Free

Multiple Choice

Sodium fluorophosphate is a chemical used in toothpaste to ________ .

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make the paste white

disinfect the toothbrush

keep the paste from spoiling

remove plaque

strengthen tooth enamel

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Question 6

Multiple Choice

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

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aspirins

pain relievers

nitrogen oxides

chlorofluorocarbons

prostaglandins

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Question 7

Multiple Choice

The production of smog from NO gas requires ________ .

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nitrogen

chlorine

water

oxygen

CFCs

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Question 8

Multiple Choice

Titanium dioxide is a chemical used in toothpaste to ________ .

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make the paste white

disinfect the toothbrush

keep the paste from spoiling

remove plaque

strengthen tooth enamel

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Question 9

Multiple Choice

Which of the following is a chemical?

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sugar

heat

light

noise

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) ________ .

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observation

hypothesis

experiment

theory

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) ________ .

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observation

hypothesis

experiment

theory

all the above

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Question 12

Multiple Choice

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

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study a little every day

form a study group

go to office hours

be an active learner

all the above

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Question 13

Multiple Choice

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

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study a little every day

form a study group

go to office hours

be an active learner

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.

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tens

ones

tenths

hundredths

thousandths

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Question 15

Multiple Choice

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

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tens

ones

tenths

hundredths

thousandths

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Question 16

Multiple Choice

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

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tens

ones

tenths

hundredths

thousandths

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Question 17

Multiple Choice

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

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-20

+20

-1

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Question 18

Multiple Choice

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

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-2

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Question 19

Multiple Choice

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

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-6

-14

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Question 20

Multiple Choice

12 is what percent of 36?

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30%

33%

330%

12%

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

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

One example of a chemical used in toothpaste is ________ .

Which of the following is not a chemical?

Sodium fluorophosphate is a chemical used in toothpaste to ________ .

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

The production of smog from NO gas requires ________ .

Titanium dioxide is a chemical used in toothpaste to ________ .

Which of the following is a chemical?

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

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

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

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

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

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

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

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

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

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

12 is what percent of 36?

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