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qwertyu

Total questions: 103

Worksheet time: 2hrs 50mins

Name
Class
Date
1.

In a chemical reaction, the mass of the products is always

a)

A. equal to the mass of the reactants.

b)

B. less than the mass of the reactant

c)

C. greater than the mass of the reactants

2.

You know you a chemical reaction has occurred if .....

a)

A. There is a precipitate..

b)

B. There is a color change

c)

C.All of these answers are evidence.

3.

Which action does NOT occur when water is broken down to form hydrogen and oxygen ?

a)

A.. Atoms are rearranged to form new substances

b)

B. Atoms of hydrogen are created

c)

C. Bonds between hydrogen and oxygen are broken.

4.

A(n) is a starting substance in a chemical reaction ?

a)

reactant

b)

coefficient

c)

product

5.

A(n) is a number placed in front of an element symbol or a chemical formula in an equation.?

a)

subscript

b)

coefficient

c)

product

6.

The compound below is called calcium carbonate. What is its chemical formula?

a)

CaCo2

b)

CaCo3

c)

CaCO4

7.

How many elements are in the compound H2SO4?

a)

2 atoms

b)

3 atoms

c)

4 atoms

8.

Element or compound?

H2O ?

a)

A. element

b)

B. compound

9.

A chemical reaction is the process of converting _____ to _____ ?

a)

atoms; molecules .

b)

reactants; products

c)

matter; energy

10.

How many hydrogen atoms are in this chemical formula ?

a)

2 hydrogen atoms

b)

3 hydrogen atom

c)

4 hydrogen atoms

11.

What is a physical property?

a)

Characteristics of a substance that cannot be observed with the senses

b)

Characteristic of a substance that can be seen but cannot be heard or smelled

c)

Characteristics of a substance that can be observed with the senses

d)

Characteristic of a substance that can only be seen during a chemical reaction

12.

What is a chemical property?

a)

Characteristic of a substance that cannot be seen

b)

Characteristic of a substance that can be observed with the senses

c)

Characteristic of a substance that can be seen but nor heard or smelled

d)

Characteristic of a substance that can only be seen during a chemical reaction

13.

What is a chemical change?

a)

A chemical reaction that is irreversible and changes the identity (chemical formula) of a substance

b)

A chemical reaction that does not change the substance at all

c)

A reversible change

d)

A change that only changes the density or color of a substance

14.

What is a physical change?

a)

A change that produces gasses or a change in color

b)

A change that is irreversible and creates a new substance

c)

A change that only reduces the size of a substance

d)

A reversible change that does NOT change the identity (chemical formula) of a substance

15.

Which of the following are chemical properties

a)

the ability to produce gas

b)

melting point

c)

solubility

d)

corrosion

e)

flammability

16.

Which of the following are physical properties

a)

flammability

b)

density

c)

solubility

d)

reactivity

e)

evaporation

17.

Bleaching your hair is a ________ change

a)

Chemical

b)

Physical

18.

Melting ice is a _________ change

a)

Chemical

b)

Physical

19.

Mixing sugar and water is a ________ change

a)

Chemical

b)

Physical

20.

Frying an egg is a ___________ change

a)

Chemical

b)

Physical

21.

Particles are suspended in water. Is this chemical or physical?

a)

Chemical

b)

Physical

22.

Magnets are used to move or remove iron from water. Is this physical or chemical?

a)

Chemical

b)

Physical

23.

Two chemicals are added together and form a solid precipitate. Is this chemical or physical?

a)

Chemical

b)

Physical

24.

When potassium is added to water fire , heat, and hydrogen gas are formed. Is this chemical or physical

a)

Chemical

b)

Physical

25.

The Statue of Liberty is made of copper. As copper reacts to the oxygen in the air and produces the green color. Is this chemical or physical?

a)

Chemical

b)

Physical

26.

What are properties that do depend on the amount of matter present called?

a)

Mass

b)

Hardness

c)

Extensive

d)

Intensive

27.

Name an extensive property

a)

Color

b)

Mass

c)

Odor

d)

Luster

28.

Name an extensive property

a)

Harness

b)

Boiling point

c)

Density

d)

Weight

29.

Freezing point is an example of

a)

extensive property

b)

intensive property

30.

Surface area is an

a)

Extensive property

b)

Intensive Property

31.

Ahmad noticed an increase of plants' height. This is an...

a)

intensive property

b)

Extensive property

32.

A 5 mL glass of water has a boiling point of 100 degrees Celcius. What would be the boiling point if the amount of sample is doubled? Hint : Boiling Point is intensive property

a)

50 degrees Celsius

b)

100 degrees Celsius

c)

150 degrees Celsius

d)

200 degrees Celsius

33.

Which of the following is not an extensive property?

a)

volume

b)

mass

c)

temperature

d)

length

34.

What is the definition of intensive property?

a)

Properties that vary depending on the amount of matter

b)

Properties that do not change with amount of matter

35.

Why are intensive properties used to characterize matter?

a)

They do not change with the amount of matter

b)

They vary with the amount of matter

c)

They are more pronounced than extensive properties

d)

None of these are correct

36.

Which prefix means 1,000?

a)

kilo

b)

centi

c)

milli-

d)

giga-

37.

Which prefix means 1/100?

a)

kilo-

b)

centi-

c)

milli-

d)

giga-

38.

Which prefix means 1/1,000?

a)

kilo-

b)

centi-

c)

milli-

d)

giga-

39.

How many centimeters in a meter?

a)

10

b)

100

c)

1,000

d)

1,000,000

40.

Which is larger, a meter or centimeter?

a)

meter

b)

centimeter

c)

they are equal

d)

not enough information

41.

76 g = _________ mg

a)

0.76

b)

76

c)

760

d)

76,000

42.

5 meters = ________ cm

a)

0.05

b)

0.005

c)

5

d)

500

43.

45 km = ______ m

a)

0.0045

b)

0.45

c)

4.5

d)

45,000

e)

45,000,000

44.

What is the prefix for 0.1?

a)

Milli

b)

Centi

c)

Deci

d)

Deka

45.

What is the prefix for 10?

a)

Deka

b)

Deci

c)

Kilo

d)

Hecto

46.

What is the prefix for 0.01?

a)

Milli

b)

Centi

c)

Deci

d)

Deka

47.

What is the prefix for 1000?

a)

Hecto

b)

Kilo

c)

Deka

d)

Centi

48.

How many sig figs are there in the following measurement?

100.00 m

a)

1

b)

3

c)

4

d)

5

49.

How many sig figs are there in the following measurement?

100000000 km

a)

1

b)

9

c)

10

d)

8

50.

How many sig figs are there in the following measurement?

4004 grams

a)

1

b)

2

c)

3

d)

4

51.

How many sig figs are there in the following measurement?

0.000008 L

a)

1

b)

2

c)

6

d)

7

52.

How many sig figs are there in the following measurement?

9009.00 km

a)

2

b)

4

c)

5

d)

6

53.

How many sig figs are there in the following measurement?

0.0009009090000 g

a)

3

b)

10

c)

14

d)

13

54.

How many sig figs are there in the following number of grams?


4001.

a)

1

b)

3

c)

4

d)

2

55.

How many sig figs are there in the following measurement?

27000000 m

a)

2

b)

5

c)

8

d)

6

56.

How many sig figs are there in the following measurement?

5.00000008 g

a)

2

b)

6

c)

9

d)

7

57.

Which of the following numbers has three significant figures?

a)

1014 m

b)

101 mm

c)

1000 s

d)

all of the choices

58.

How many significant figures does the following measurement have: 0.998005 m

a)

9

b)

10

c)

6

d)

5

59.
All of the following have one significant figure except:
a)
100 cm
b)
0.0001 cm
c)
2 cm
d)
2.00 cm
60.
Which of the following numbers have four significant figures?
a)
56.75 g
b)
40.01 g
c)
0.6000 g
d)
all of the choices
61.

What are significant figures?

a)

a way of writing very large or very small numbers

b)

the meaningful figures in our measurements

c)

how close a measurement is to the correct value for that measurement

d)

to how close the agreement is between repeated measurements

62.

In the measurement 48.93 L, which digit is estimated?

a)

4

b)

8

c)

9

d)

3

e)

none of the above

63.
ow would you write 123,000,000 in scientific notation?
a)
1.23 x 108
b)
1.23 x 107
c)
1.23 x 10-8
d)
1.23 x 10-7
64.
How would you write 4.567 x 103 in standard form?
a)
4.567 x 103 (same)
b)
0.004567
c)
4,567
d)
4.567 x 10-3 (same but negative in exponent)
65.
How would you write 0.0005 in scientific notation?
a)
50 x 105
b)
0.5 x 105
c)
0.5 x 10-4
d)
5 x 10-4
66.
How would you write -5.6 x 10-3 in standard form?
a)
-0.00056
b)
-5,600
c)
-0.0056
d)
0.0056
67.
Express the following in scientific notation:
10,030,400,000
a)
1 x 1010
b)
1.003 x 1010
c)
1.00304 x 1010
d)
1.00304 x 10-10
68.
Which has the largest mass per atom?
a)
Carbon
b)
Gold
c)
Oxygen
d)
Silver
69.
Transform the number in scientific notation: 5.0
a)
5.0 x 101
b)
5.0 x 100
c)
5.0 x 10-1
d)
Love is always the answer.
70.
Scientific Notation is made up of two number parts. The second part is a power of base 10.
a)
True
b)
False
71.
What is scientific notation?
a)
A long way to write really short  numbers
b)
A short way to write really long numbers
c)
I'm sad. I don't know.
d)
None of the above.
72.
It is element/chemical behind the curling of hairs strands.
a)
phosphorus
b)
chlorine
c)
sulfur
d)
fluorine
73.
It is a measure of how close measurements come to each other when they are made in the same way
a)
Accuracy
b)
Precision
c)
Error
d)
Extrapolation
74.
a)
Student A
b)
Student B
c)
Student C
d)
Cannot be determined
75.

How close a measurement is to the accepted value is called..

a)

Accuracy

b)

Precision

c)

Significant

d)

Estimate

76.
This bullseye demonstrates...
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
77.
?
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
78.
The students measured length during a science experiement, they got 12 cm. But the actual measurement was 14.25 cm. What was the percent error?
a)
15.79%
b)
18.75%
c)
2.25%
d)
18%
79.
Jessie estimates the weight of her cat to be 8 pounds.  The actual weight of the cat was 10 pounds.  Find the percent error.  
a)
15%
b)
20%
c)
25%
d)
30%
80.

Which is the more precise measurement?

a)

4 mL

b)

4.3 mL

c)

4.30 mL

d)

4.300 mL

81.
Describe the accuracy and precision of the image
a)
Accurate and Precise
b)
Accurate and not precise
c)
Not Accurate and Precise
d)
not accurate and not precise
82.

How close a measurement is to the true value is called..

a)

Accuracy

b)

Precision

c)

Significant

d)

Estimate

83.
volume?
a)
48 mL
b)
48.2 mL
c)
48.25 mL
d)
4 mL
84.
Volume?
a)
63.5 mL
b)
63 mL
c)
63.55 mL
d)
6 mL
85.
This image is an example of...
a)
precision ONLY
b)
accuracy ONLY
c)
BOTH precision and accuracy
d)
NEITHER precision and accuracy 
86.

Which Student is the most Precise?

a)

Alex

b)

Shandra

c)

Luis

87.
A set of data are all close to each other, but they are not close to the actual value.  This set of data can be described as...
a)
accurate
b)
precise
c)
both precise and accurate
88.
A set of data are all close to each other, and they are close to the actual value.  This set of data can be described as...
a)
accurate
b)
precise
c)
both precise and accurate
89.
Round the decimal 3.723 to the nearest whole number.
a)
3
b)
4
c)
5
d)
2
90.
Round the following decimal to the nearest whole number.
17.429
a)
16
b)
17
c)
17.4
17.4
d)
17.5
91.
Round to the nearest tenths place 1.567
a)
1.56
b)
1.5
c)
1.567
d)
1.6
92.
Round to the nearest hundredths place 
77.538
a)
77.53
b)
77.54
c)
78
d)
77.5
93.
Round to the nearest tenths place.
102.569
a)
102
b)
102.5
c)
102.6
d)
102.56
94.

What is 78.5 rounded to one significant figure?

a)

79

b)

78.5

c)

70

d)

80

95.

Round off 1,296,717 to 3 significant figures

a)

1,290,000

b)

1,296,000

c)

1,297,000

d)

1,300,000

96.

Round off 509.96 to 4 significant figures

a)

509.9

b)

509.0

c)

510.0

d)

510

97.

What is 0.658 rounded to 1 significant figure?

a)

0

b)

0.66

c)

0.7

d)

0.658

98.

Round 0.010229 to four significant figures

a)

1022

b)

1023

c)

0.01023

d)

0.01022

99.

Round 1047.78 to three significant figures.

a)

104

b)

105

c)

1050

d)

1050.00

100.

What is 375.6523 to four significant figures.

a)

375.0

b)

375.00

c)

375.7

d)

375.6

101.

Round 1099 to three significant figures.

a)

100

b)

101

c)

1100

d)

1,000

102.

What is 7.555 rounded to two significant figures.

a)

7.6

b)

7.5

c)

70

d)

76

103.

Round 8,775 to three significant figures.

a)

877

b)

8,770

c)

8,780

d)

8,770

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