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Intro to Chem Review

Total questions: 52

Worksheet time: 39mins

Name
Class
Date
1.

An observation made with your senses

a)

Qualitative observation

b)

Quantitative observation

c)

temperature

d)

conclusion

2.

What is an hypothesis?

a)

a guess

b)

a testable, tentative explanation

c)

a theory

d)

data

3.

What is a manipulated variable (independent variable)?

a)

the variable that changes as a result of the experiment

b)

the variable that the scientist changes

c)

the evidence

d)

the quantitative observation

4.

Based on the graph, what happens to the solubility of CO2 as the temperature increases?

a)

it increases

b)

it stays the same

c)

it decreases

d)

what is a graph?

5.

What is a control?

a)

a variable that is unchanged to compare results to

b)

a changed variable

c)

a hypothesis

d)

a conclusion

6.

Which of the following is an example of quantitative data?

a)

grey

b)

oily

c)

44.2oC

d)

Copper

7.

What is an atom?

a)

Smallest particle of a substance

b)

Raw materials made of only one kind of atom

8.

What chart is used to organize the elements by atomic number?

a)

Atomic Table

b)

Periodic Table

c)

Kitchen Table

9.

What is a electron?

a)

Particle in an atom with a POSITIVE charge

b)

Particle in an atom with a NEGATIVE charge

c)

Particle in an atom with a NO charge

10.

What is a molecule?

a)

Substances with molecules that have atoms from different elements

b)

Two or more atoms joined together

11.

What is a neutron?

a)

Particle in an atom with a POSITIVE charge

b)

Particle in an atom with a NEGATIVE charge

c)

Particle in an atom with a NO charge

12.

What is a proton?

a)

Particle in an atom with a POSITIVE charge

b)

Particle in an atom with a NEGATIVE charge

c)

Particle in an atom with a NO charge

13.

The number of protons is also equal to which number?

a)

Atomic Number

b)

Phone Number

c)

Prime Number

14.
How many significant figures does the following number have?
0.00345
a)
6
b)
5
c)
3
d)
Ambiguous: 3,4,5, or 6
15.
How many significant figures does the following number have?
0.00345
a)
6
b)
5
c)
3
d)
Ambiguous: 3,4,5, or 6
16.
How many significant figures does the following number have: 0.00204
a)
6
b)
4
c)
3
d)
2
17.

How many significant figures does the following number have?1.2500 x 10310^3  

a)
5
b)
3
c)

Ambiguous: 3 or 5

d)

7

18.
How many significant figures does the following number have: 100.00210
a)
7
b)
8
c)
10
d)
Ambiguous: 7 or 8
19.
Round 1289 to three significant figures
a)
1290
b)
130
c)
1300
d)
1.29x103
20.
What is 98.907 rounded to 1 significant figure?
a)
98.9
b)
90
c)
100
d)
1x102
21.
Solve and give your answer with the correct number of significant figures
(12.470)(271)
a)
3366.9
b)
3.37x103
c)
3400
d)
3370
22.
Solve and give your answer with the correct number of significant figures
129.6/3
a)
43.0
b)
43
c)
 4x101
d)
40
23.
Solve and give your answer with the correct number of significant figures
24.28 + 12.5
a)
3.687 x 101
b)
36.8
c)
37
d)
3.70x101
24.
Solve and give your answer with the correct number of significant figures
1421-34
a)
1.39x103
b)
1387
c)
1390
d)

1400

25.

Round 0.010229 to four significant figures

a)

1022

b)

1023

c)

0.01023

d)

0.01022

26.

What is 0.658 rounded to 1 significant figure?

a)

0

b)

0.66

c)

0.7

d)

0.658

27.

What is 7.555 rounded to two significant figures?

a)

7.6

b)

7.5

c)

70

d)

76

e)

7.60

28.
Round 52689 to 3 significant figures.
a)
526
b)
527
c)
52600
d)
52700
29.
Round 0.00258954 to 4 significant figures.
a)
0.0025
b)
0.002589
c)
0.002580
d)
0.002590
30.
Round 1235 to 2 significant figures.
a)
12
b)
1200
c)
1200.
d)
1200.00
31.

Round the following value to one significant figure...


8291

a)

8000

b)

9000

c)

7000

d)

8300

32.

Round 509.96 to 4 significant figures

a)

509.9

b)

509.0

c)

510.0

d)

510

33.

What is 375.6523 to four significant figures?

a)

375.0

b)

375.00

c)

375.7

d)

375.6

34.

Round 1099 to three significant figures.

a)

1.10 x 103

b)

101

c)

1010

d)

1,000

e)

1100

35.

Round the following value to one significant figure...


15

a)

10

b)

20

c)

100

d)

2

36.
Round 1047.78 to three sig figs
a)
104
b)
105
c)
1050
d)
1050.00
37.
Round 7256.320004 to 8 significant figures.
a)
7256.3200
b)
7256.0000
c)
72563200
d)
72560000
38.
This bullseye demonstrates...
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
39.
?
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
40.
This image is an example of...
a)
precision ONLY
b)
accuracy ONLY
c)
BOTH precision and accuracy
d)
NEITHER precision and accuracy 
41.
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
42.

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

a)

Accuracy

b)

Precision

c)

Significant

d)

Estimate

43.
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
44.
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
45.

Measurements: 24.9, 25.2, 25.1, 24.8

True Value: 25.0

These measurements are…

a)

Accurate, but not precise

b)

Precise, but not accurate

c)

Both precise and accurate

d)

Neither precise nor accurate

46.

Measurements: 2.5, 14.5, 10.1, 45.3

True Value: 25.0

These measurements are…

a)

Accurate, but not precise

b)

Precise, but not accurate

c)

Both precise and accurate

d)

Neither precise nor accurate

47.

What is the length?

a)

7

b)

7.7

c)

7.70

d)

7.700

48.

What is the volume?

a)

50

b)

45

c)

45.0

d)

40.5

49.

WHAT IS THE VOLUME?

a)

36

b)

36.5

c)

37.0

d)

36.0

50.

WHAT IS THE LENGTH?

a)

11.45

b)

11.4

c)

11

d)

11.450

51.

WHAT IS THE VOLUME?

a)

20.15

b)

20.1

c)

21.5

d)

21.50

52.

WHAT IS THE LENGTH?

a)

29

b)

29.2

c)

29.20

d)

30

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