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Optional Review Unit One: Matter and Measurement

Total questions: 78

Worksheet time: 2hrs 33mins

Name
Class
Date
1.

Which of the following is NOT a physical change?

a)

grinding

b)

cutting

c)

boiling

d)

burning

2.

The SI base units for length and time are

a)

centimeter and second

b)

meter and hour

c)

centimeter and hour

d)

meter and second

3.

Which pair of quantities determines the density of a substance?

a)

mass and weight

b)

volume and weight

c)

volume and concentration

d)

volume and mass

4.

The number of grams equal to 0.5kg is

a)

0.0005

b)

0.005

c)

500

d)

5000

5.

The number of significant figures in the measurement 2010 is

a)

1

b)

2

c)

3

d)

4

6.

Which statement best describes an element?

a)

any combination of two or more atoms of different types

b)

a pure substance made up of only one kind of atom

c)

a substance containing only carbon atoms

d)

any kind of crystal

7.

Which of the following is not an indication that a chemical reaction (chemical change) has taken place?

a)

Formation of a precipitate

b)

Unexpected change in color

c)

Production of gas

d)

Drying out and cracking

8.

What is difference between a pure substance and a mixture?

a)

A substance is sometimes heterogenous.

b)

A mixture is made up of one element.

c)

A mixture's composition may vary.

d)

A substance can be seperated physically.

9.

Compounds can be broken down into simpler substances by physical means.

a)

True

b)

False

10.

How close my measurements are to one another is a measure of

a)

accurracy

b)

precision

11.

Lead is an element. What word below describes an element?

a)

pure substance

b)

compound

c)

heterogenous mixture

d)

homogenous mixture

12.

What kind of substance is table salt (NaCl)?

a)

compound

b)

homogenous mixture

c)

heterogenous mixture

d)

pure substance

13.

The elements Hydrogen and Oxygen chemically combine to make water.  What type of substance is water?

a)

element

b)

compound

c)

heterogenous mixture

d)

homogenous mixture

14.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
15.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
16.

What type of substance is pictured?

a)

element

b)

compound

c)

mixture

d)

solution

17.

What type of substance is pictured?

a)

element

b)

compound

c)

mixture

d)

solution

18.

Which is a mixture of compounds?

a)
b)
c)
d)
19.
Which of the following numbers has three significant figures?
a)
1014 miles
b)
101 feet
c)
1000 yards
d)
all of the choices
20.
How many significant figures does the following number have: 100.00210
a)
7
b)
5
c)
10
d)
8
21.
How many significant figures does the following number have: 0.998005
a)
9
b)
10
c)
6
d)
5
22.
Round 0.010229 to four significant figures
a)
1022
b)
1023
c)
0.01023
d)
0.01022
23.

What is the length of the screw?

a)

5.0cm

b)

5.1cm

c)

5.11cm

d)

51mm

24.

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

a)

Accuracy

b)

Precision

c)

Significant

d)

Estimate

25.
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%
26.

Volume?

a)

63.50 mL

b)

63.5 mL

c)

63. mL

d)

63.0 mL

27.

7,000 mL = ____ L

a)

70 L

b)

700 L

c)

7 L

d)

0.07 L

28.

Which is the most precise measurement?

a)

4 mL

b)

4.3 mL

c)

4.30 mL

d)

4.300 mL

29.
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
30.
When a measurement is repeatable and consistent it is said to have...
a)
High precision
b)
Low precision
c)
High accuracy
d)
Low accuracy
31.
The SI base unit of temperature
a)
kilogram
b)
meter
c)
significant figure
d)
kelvin
32.
The number of all known digits reported in measurements plus one estimated digit.
a)
percent error
b)
scientific notation
c)
significant figure
d)
conversion factor
33.

When reacting Na with Cl2, we calculated that the yield should be 13 grams. When the lab was conducted we were able to retrieve only 12.5 grams. What is the percent yield?

a)

90.4%

b)

104%

c)

96.15%

d)

1.04%

34.

Students worked in teams to measure the length of an object. Their results are listed below. The actual length of the object was 7.0 cm. Select the best choice that represents their data in terms of accuracy and precision

GROUP RESULTS

5.00 cm

5.01 cm

5.02cm

4.99 cm

5.00 cm

4.99 cm

a)

both accurate and precise

b)

only accurate

c)

only precise

d)

not accurate and not precise

35.

Blue color

a)

Physical Property

b)

Chemical Property

36.

Density

a)

Physical Property

b)

Chemical Property

37.

Flammability

a)

Physical Property

b)

Chemical Property

38.

Solubility

a)

Physical Property

b)

Chemical Property

39.

Melting point

a)

Physical Property

b)

Chemical Property

40.

Sugar dissolves in water

a)

Physical Change

b)

Chemical Change

41.

Length

a)

Intensive Physical Property

b)

Extensive Physical Property

42.

Density

a)

Intensive Property

b)

Extensive Property

43.

Color

a)

Intensive Property

b)

Extensive Property

44.

Melting point

a)

Intensive Property

b)

Extensive Property

45.

A homogenous mixture is also referred to as a(n)

a)

compound

b)

solution

c)

precipitate

d)

gas

46.

What happens when salty water is boiled?

a)

The salt becomes a new compound and water evaporates as it has a low boiling point

b)

The water evaporates and the salt remains in the beaker as it has a high melting point

c)

The water becomes a new compound and evaporates while salt remains in the beaker

d)

The water will disappear and the salt remains in the beaker as it is a solid

47.

The process used to separate heterogeneous mixtures of solids and liquids (like sand and water) is called

a)

filtration

b)

crystallization

c)

distillation

d)

chromatography

48.

Name the separation technique shown in the diagram

a)

Filtration

b)

Chromatography

c)

Centrifugation

d)

Distillation

49.

Lauren wants to separate salt from water. What separation technique should she use?

a)

Evaporation

b)

Filtration

c)

Chromatography

50.

Dyes in water soluble markers may be separated by means of..

a)

crystallization

b)

sublimation

c)

chromatography

d)

sedimentation

51.
How many sig figs are there?
0.000008
a)
1
b)
2
c)
6
d)
7
52.
How many sig figs are there?
100000000
a)
1
b)
9
c)
10
53.
How many significant figures: 0.010 L
a)
1
b)
2
c)
3
d)
4
54.
How many significant figures: 153.0 mL
a)
1
b)
2
c)
3
d)
4
55.

What is the volume of the liquid in this graduated cylinder?

a)

19 mL

b)

35 mL

c)

24.0 mL

d)

26.0 mL

56.
a)

Both sets are equally precise as the average is the same for both.

b)

The set on the left is more precise as the calculated percent difference would be smaller.

c)

The set on the right is more precise as the calculated percent difference would be smaller.

d)

The set on right is more precise as the calculated percent difference would be larger.

57.

When using scientific notation, a negative exponent means ...

a)

the standard number is greater than one

b)

the standard number is less than one

c)

the negative sign doesn't have a meaning

d)

None of the above

58.

Convert this number into scientific notation: 0.068

a)

6.9 x 106

b)

6.8 x 10-9

c)

6.8 x 10-2

d)

None of the above

59.

Convert this number into scientific notation: 950,000

a)

9.5 x 105

b)

9.5 x 10-9

c)

9.5 x 102

d)

None of the above

60.
You know that 12 inches = 1 foot.  Convert 60 inches to feet.
a)
720 feet
b)
5 feet
c)
5 inches
d)
72 feet
61.

Convert 32,190 inches/year to yards/day

1 year = 365 days

12 inches = 1 foot

3 feet = 1 yard

a)

88.19 yards/day

b)

7.3 yards/day

c)

2.4 yards/day

d)

4.9 yards/day

62.

How many kilograms of calcium are there in 173 pounds of calcium? (1 pound = 454 grams; 1 kg = 1000 g)

a)

1.10 kg

b)

78.5 kg

c)

110 kg

d)

78500 kg

63.

A passenger jet has a speed of 900. km/hr.

What is its speed in m/s? (Conversions 1000m = 1km; 60 s = 1 min; 60min = 1hr). Please note, you must show your dimensional analysis on the test to receive credit. Answers only will not be acceptable.

a)

250. m/s

b)

324 m/s

c)

1.50 x 102 m/s

d)

2.50 x 103 m/s

64.
What unit should be in the denominator of the conversion factor?
a)
yards
b)
leagues
c)
feet
d)
fathoms
65.
Gas costs $3.05 a gallon, and your car travels at 27 miles for each gallon of gas. How far can you travel in your car with $95 in your pocket?
a)
11 miles
b)
840 miles
c)
7800 miles
d)
870 miles
66.

A child weighs 40.0 lb and is to receive 0.10 mg of an antibiotic for each kg of body weight. How many milligrams of the antibiotic shall the child receive? 1 kg = 2.2 lbs; 1000 mg = 1 g; 1000 g = 1 kg

a)

18.1 mg

b)

181 mg

c)

0.181 mg

d)

1.81 mg

67.

Calculate 7.987 m - 0.54 m and give your answer with the correct number of significant figures.

a)

7.45 m

b)

7.5 m

c)

7.4 m

d)

7.447 m

68.

Calculate 12.34 + 1.234 + 0.1234 and give your answer with the correct number of significant figures.

a)

13.6974

b)

13.697

c)

13.70

d)

13.7

69.

How many significant figures are in the result for the following calculation?

6.08 kg×5.0 ms6.08\ kg\times5.0\ \frac{m}{s}  

a)

3 significant figures

b)

1 significant figure

c)

2 significant figures

d)

4 significant figures

e)

5 significant figures

70.

Which of the following measurements would be used to determine the number of significant figures or decimal places to round the answer to? 

a)

17.2 g

b)

9 g

c)

36.33 g

d)

0.58 g

71.

Solve. Round using SigFig math rules.

103 cm x 11 cm

a)

11 cm2

b)

1100 cm2

c)

1130 cm2

d)

1133 cm2

72.

Solve. Round using SigFig math rules.

1.3562 mL / 14.32 g

a)

0.094 mL/g

b)

0.0947 mL/g

c)

0.094706 mL/g

d)

0.09471 mL/g

73.
Calculate 923 g ÷ 20312 cm3 and give your answer with the appropriate number of significant figures.
a)
0.04 g/cm3
b)
0.045 g/cm3
c)
0.0454 g/cm3
d)
4 x 10-2 g/cm3
74.
Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density?
a)
3 g/cm3
b)
1/3 g/cm3
c)
27 g/cm3
d)
39 g/cm3
75.
What is the volume of Spongebob Squarepants based on the displacement of the water in the graduated cylinder. 
a)
50mL
b)
52mL
c)
102mL
d)
2mL
76.

Chemistry is

a)

the study of life

b)

the study of motion and force

c)

the study of what matter is made of and how it changes

d)

the study of unit conversions

77.

Which of the following conversion factors are needed to convert the value 65 mi/h to units of km/h? Select all that apply.

a)

1 h60 min⁡\frac{1\ h}{60\ \min}  

b)

1 min⁡60 s\frac{1\ \min}{60\ s}  

c)

1 h3600 s\frac{1\ h}{3600\ s}  

d)

1.609 km1 mi\frac{1.609\ km}{1\ mi}  

78.

All conversion factors have a mathematical value of

a)

1/100

b)

1

c)

10

d)

any multiple of 10

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