Chapter 1: Chemistry in our lives

Question 1

is the study structure, properties, and
reactions of matter which also happen all around you everyday

Answer 1

Chemistry

Question 2

is another word for all substances that make up our world

Answer 2

Matter

Question 3

It has weight and mass and occupies space

Answer 3

Matter

Question 4

substances that have the
same composition and
properties wherever found.

Answer 4

Chemicals

Question 5

chemicals in toothpaste that is used as an abrasive to remove plaque

Answer 5

Calcium carbonate

Question 6

chemical in toothpaste that prevents loss of water and hardening of toothpaste

Answer 6

sorbitol

Question 7

used to loosen plaque

Answer 7

Sodium lauryl sulfate

Question 8

makes toothpaste white and opaque

Answer 8

Titanium dioxide

Question 9

Inhibits bacteria that cause plaque and gum disease

Answer 9

triclosan

Question 10

prevents formation of cavities by strengthening tooth enamel with fluoride

Answer 10

Sodium fluorophosphate

Question 11

gives toothpaste a pleasant wintergreen flavor

Answer 11

Methyl salicylate

Question 12

Any substance that has defined composition

Answer 12

chemical

Question 13

Won the Nobel Prize in chemistry in 1954

Answer 13

Linus Pauling

Question 14

is a set of general principles that
helps to describe how a scientist thinks

Answer 14

scientific method

Question 15

Steps of scientific method

Answer 15

1. Observations
2. hypothesis
3. experiments
4. Conclusion

Question 16

_____ can be modified if the results
of the experiments do
not support it.

Answer 16

Hypothesis

Question 17

develops conclusions
using observations,
hypotheses, and
experiments

Answer 17

The scientific methods

Question 18

The coefficient should be ___

Answer 18

higher than 1 but not greater than 9

Question 19

From the decimal point to the right result to a power of 10 that is _

Answer 19

Negative

Question 20

From the decimal point to the left results to a power of 10 that is _

Answer 20

Positive

Question 21

Numbers written in scientific notation have two
parts:

Answer 21

Coefficient and Power of 10

Question 22

1x10^0

Answer 22

1

Question 23

550 000 000 000 in scientific notation

Answer 23

5.5 x 10^11

Question 24

12 800 000 in scientific notation

Answer 24

1.28 X 10^7

Question 25

500 in scientific notation

Answer 25

5 X 10^2

Question 26

0.000 000 3 in scientific notation

Answer 26

3 X 10^-7

Question 27

Chemistry in our lives deals with _ called _

Answer 27

substances ; chemicals

Question 28

Chemistry in our life uses the ___ starting with -___ that leads to ___,____,___

Answer 28

scientific method; observations, hypothesis, experiment, and conclusion

Question 29

In whole number, the 5 in 625 is in _ place

Answer 29

Ones place

Question 30

In decimal, the 9 in 0.925 is the _ place

Answer 30

tenths

Question 31

formula to calculate the percentage

Answer 31

Percentage of each chemical = grams given/ the total grams (addition of all given grams) x 100

Question 33

Describe as the number or times you move the decimal

Answer 33

Power of 10

Question 34

A number between 1 and 9

Answer 34

Coefficient