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Unit Test 1 (Laboratory and Measurements) SAMPLE EXAM 09/04/2024

Total questions: 107

Worksheet time: 2hrs 48mins

Name
Class
Date
1.

Which of the following is a Erlenmeyer flask?

a)

b)

c)

d)

2.

Which of the following is a volumetric flask?

a)

b)

c)

d)

3.

Which of the following is a beaker?

a)

b)

c)

d)

4.

Which of the following is a graduated cylinder?

a)

b)

c)

d)

5.

The accuracy of a measurement

a)

is how close it is to the true value.

b)

does not depend on the instrument being used to measure the object.

c)

indicates that the measurement is also precise.

d)

is something that scientists rarely achieve.

6.

Which of the following is a correct estimate for the volume of water in the graduated cylinder shown to the right?

a)

13 mL

b)

13.1 mL

c)

12 mL

d)

12.1 mL

7.

How many significant figures are in 30108.9?

a)

6

b)

5

c)

4

d)

1

8.

How many significant figures are in 0.0000970?

a)

7

b)

6

c)

3

d)

2

9.

How many significant figures are in 1.200 x 104?

a)

1

b)

2

c)

3

d)

4

10.

How many significant figures are in 530?

a)

3

b)

2

c)

4

d)

5

11.

  1. Solve the following operation and round accordingly.

  2. 50.0 + 50.5 =

a)

100.

b)

100.0

c)

100.5

d)

100.1

12.

  1. Solve the following operation and round accordingly.

  2. 20.1 * 5.50 =

a)

110.55

b)

110.6

c)

111

d)

110

13.

  1. Solve the following operation and round accordingly.

  2. 63.2 - 37.9267 =

a)

25.2733

b)

25.2

c)

25.3

d)

25.27

14.

Solve the following operation and round accordingly.

80 ÷ 49.634 =

a)

1.611

b)

2

c)

2.000

d)

1.6

15.

What is the SI unit of mass?

a)

µg

b)

mg

c)

g

d)

kg

16.

What is the SI unit of length?

a)

m

b)

mm

c)

cm

d)

km

17.

What is the SI unit of temperature?

a)

Heat Energy (kj.mol-1)

b)

Fahrenheit (oF)

c)

Kelvin (K)

d)

Celsius (oC)

18.

The prefix kilo means:

a)

1 x 10-6

b)

1 x 10-3

c)

1 x 103

d)

1 x 106

19.

The prefix centi means:

a)

1 x 10-2

b)

1 x 10-1

c)

1 x 102

d)

1 x 101

20.

The prefix mili means:

a)

1 x 10-3

b)

1 x 10-1

c)

1 x 103

d)

1 x 101

21.

On a graph which axis do you put the independent variable on?

a)

X-axis

b)

Y-axis

c)

Both

d)

Neither

22.

On a graph which axis do you put the dependent variable on?

a)

X-axis

b)

Y-axis

c)

Both

d)

Neither

23.

Students measured the height of bean plants depends on the amount of water they receive.

What is the dependent variable in her experiment?

a)

type of bean plant

b)

amount of water

c)

light intensity

d)

the height of bean plants

24.

Which of the following is NOT a safety rule you should follow in the lab?

a)

Long hair should be tied back.

b)

Don’t play in the lab.

c)

Goggles should be worn at all times.

d)

Carefully check the label before returning chemicals to the original bottle.

25.

1000 g = ______ kilogram(s)

a)

1000

b)

100

c)

10

d)

1

26.

Solve the following operation and round accordingly.

0.007 x 0.28 x 2300

a)

4.508

b)

4.51

c)

4

d)

5

27.

Solve the following operation and round accordingly.

1000 ÷ 6.8

a)

147.05

b)

147.06

c)

200

d)

100

28.

Solve the following operation and round accordingly.

605 ÷ 3.735

a)

161.98

b)

161.99

c)

162

d)

161

29.

Solve the following operation and round accordingly.

26.988 x 38.94

a)

1050.912

b)

1050.90

c)

1050.91

d)

1051

30.

Solve the following operation and round accordingly.

1.9 x 58

a)

111

b)

110.2

c)

110

d)

110.21

31.

Solve the following operation and round accordingly.

5.875 + 85.329 + 98.32

a)

189.5

b)

189.524

c)

189.52

d)

190

32.

Solve the following operation and round accordingly.

2.599 + 24.144

a)

26.7

b)

26.743

c)

26.74

d)

26.75

33.

Solve the following operation and round accordingly.

47.3 - 4.52

a)

42.78

b)

42.8

c)

43

d)

42.70

34.

How many significant figures are there in 4 x 108 grams?

a)

9

b)

8

c)

2

d)

1

35.

Solve the following operation and round accordingly.

6.521 + 25.9 + 4.5475

a)

37.0

b)

37

c)

37.00

d)

37.000

36.

What is rounded 1289 to three significant figures?

a)

1300

b)

1290

c)

1280

d)

1200

37.

What is rounded 0.010229 to four significant figures?

a)

0.01023

b)

0.01022

c)

0.01000

d)

0.01021

38.

What is 78.5 rounded to one significant figure?

a)

77

b)

70

c)

79

d)

80

39.

How many significant figures are there in 3.249 x 10-4 grams?

a)

4

b)

3

c)

2

d)

1

40.

How many significant figures are there in 6.050 x 105 meters?

a)

4

b)

3

c)

2

d)

1

41.

How many significant figures are there in 0.001 meters?

a)

1

b)

2

c)

3

d)

4

42.

How many significant figures are there in 0.020 meters?

a)

4

b)

3

c)

2

d)

1

43.

How many significant figures are there in 0.000300 grams?

a)

4

b)

3

c)

2

d)

1

44.

How many significant figures are there in 0.0054 grams?

a)

5

b)

4

c)

3

d)

2

45.

How many significant figures are there in 1007 grams?

a)

1

b)

2

c)

3

d)

4

46.

Which of the following is a correct estimate for the volume of water in the graduated cylinder shown to the right?

a)

4.57 mL

b)

4.5 mL

c)

4.6 mL

d)

4.579 mL

47.

Express the quantity 33.2 * 10-4 m in mm.

a)

33.2 mm

b)

3.32 mm

c)

0.332 mm

d)

3.32 * 10-6 mm

48.

How many significant figures are there in the number 0.080320?

a)

3

b)

4

c)

5

d)

6

49.

Express the number 0.000042 in scientific notation.

a)

0.42 × 10−4

b)

4.2 × 10−5

c)

4.2 × 10−4

d)

4 × 10−5

50.

How many significant figures are in the number 0.00620?

a)

2

b)

3

c)

4

d)

5

51.

Round the number 89.04997 to three significant figures.

a)

89.03

b)

89.04

c)

89.1

d)

89.0

52.

Perform this multiplication to the correct number of significant figures:

65.2 × 0.0015 × 12.02

a)

1.17

b)

1.18

c)

1.2

d)

1.176

53.

Perform this addition to the correct number of significant figures:

8.32 + 12.148 + 0.02

a)

20.488

b)

20.49

c)

20.5

d)

21

54.

Convert 76.8 cm to m.

a)

0.0768 m

b)

7.68 m

c)

0.768 m

d)

7.68 × 10−2 Žm

55.

Convert 2855 mg to kg.

a)

2.855 × 10−3 Žkg

b)

2.855 kg

c)

0.02855 kg

d)

3.503 × 10−4 Žkg

56.

Which piece of lab equipment is used to measure the mass of an object?

a)

Beaker

b)

Bunsen burner

c)

Graduated cylinder

d)

Balance

57.

Which lab equipment is used to hold small amounts of liquid?

a)

Volumetric Flask

b)

Graduated cylinder

c)

Test tube

d)

Bunsen burner

58.

What is the best instrument for measuring the volume of the equipment listed below?

a)

Beaker

b)

Erlenmeyer Flask

c)

Graduated Cylinder

d)

Dropper

59.

Look at the graph of monthly average temperatures recorded in Jamaica over a year.

  1. Which month had the highest average temperature?

a)

  1. June

b)

  1. July

c)

  1. August

d)

  1. March

60.

Look at the graph of monthly average temperatures recorded in Jamaica over a year.

  1. Which month had the lowest average temperature?

a)

  1. January

b)

  1. February

c)

  1. March

d)

  1. April

61.

Look at the chart of car sales.

Which make of car was the most popular?

a)

Nissan

b)

Vauxhall

c)

Peugeot

d)

Toyota

62.

Look at the chart of car sales.

  1. Which 2 makes of car sold over 150 each?

a)

  1. Toyota and MG Rover

b)

  1. Toyota and Vauxhall

c)

  1. Vauxhall and Peugeot

d)

  1. Peugeot and MG Rover

63.

Look at the chart of car sales.

  1. Which was the lowest selling make?

a)

  1. Land Rover

b)

  1. BMW

c)

  1. Jaguar

d)

  1. Others

64.

What is the independent variable on the graph?

a)

Metro Bicycle Shop Weekly Sales

b)

Types of Bicycles

c)

Bicycles Sold

d)

Bicycles

65.

What is the dependent variable on the graph?

a)

Metro Bicycle Shop Weekly Sales

b)

Types of Bicycles

c)

Bicycles Sold

d)

Bicycles

66.

The graph below shows the average hours of sun per day over a period of one year.

What was the month in which there were the least number of average hours of sun per day?

a)

January

b)

June

c)

March

d)

December

67.

The graph shows the number of visitors at a museum over six days.

Find the weekday when there were the second least number of visitors in a day?

a)

Wednesday

b)

Friday

c)

Thursday

d)

Sunday

68.

This bullseye demonstrates...

a)

High Accuracy & High Precision

b)

Low Accuracy & High Precision

c)

High Accuracy & Low Precision

d)

Low Accuracy & Low Precision

69.

This bullseye demonstrates...

a)

High Accuracy & High Precision

b)

Low Accuracy & High Precision

c)

High Accuracy & Low Precision

d)

Low Accuracy & Low Precision

70.

This bullseye demonstrates...

a)

High Accuracy & High Precision

b)

Low Accuracy & High Precision

c)

High Accuracy & Low Precision

d)

Low Accuracy & Low Precision

71.

This bullseye demonstrates...

a)

High Accuracy & High Precision

b)

Low Accuracy & High Precision

c)

High Accuracy & Low Precision

d)

Low Accuracy & Low Precision

72.

Measure the length of the line.

a)

3.2 cm

b)

3 cm

c)

3.12 cm

d)

3.219 cm

73.

Which of the following is a correct estimate for the volume of water in the graduated cylinder shown to the right?

a)

63.5 mL

b)

63.55 mL

c)

63 mL

d)

6 mL

74.

You place a rock on the electronic balance an it measures a mass of 12.38 g.  The estimated digit is....

a)

1

b)

2

c)

3

d)

8

75.

The metal is 7.1 cm long.

According to this, which of the following options is correct?

a)

7 is the estimated digit

b)

7 is the uncertain digit

c)

1 is the estimated digit

d)

1 is the certain digit

76.

A numerical result is said to have good precision if

a)

it agrees closely with an accepted value

b)

it is a large whole number

c)

it has a small number of significant figures

d)

repeated measurements agree closely

77.

A measurement that closely agrees with an accepted value is best described as

a)

reproducible

b)

significant

c)

precise

d)

accurate

78.

A student performed an analysis of a sample for its calcium content and got the following results:

Trial-1: 14.92%, Trial-2: 14.91%, Trial-3: 14.88%, Trial-4: 14.91%

The actual amount of calcium in the sample is 14.90%. 

What conclusions can you draw about the accuracy and precision of these results?  

a)

  1. While precise, these results are not accurate.

b)

  1. While accurate, these results are not accurate.

c)

  1. These results are both accurate and precise.

d)

  1. These results are neither accurate nor precise.

79.

What is the correct order of the steps in the scientific method?

a)

observation - research question - hypothesis - experiment - conclusion - analyze

b)

experiment - research question - hypothesis - observation - analyze - conclusion

c)

observation - analyze - hypothesis - experiment - research question - conclusion

d)

observation - research question - hypothesis - experiment - analyze - conclusion

80.

The variable the scientist is manipulating during and experiment is the _________ in an experiment.

a)

independent variable

b)

dependent variable

c)

controlled variable

d)

control group

81.

Variables that are kept constant during an experimental trial are called ___________ variables.

a)

independent

b)

dependent

c)

controlled

d)

none of them

82.

Identify the independent variable (IV) and the dependent variable (DV) in the following study.

A group of college students were given a short course in speed-reading. The instructor was curious if a financial support would influence performance on a reading test taken at the end of the course. Half the students were offered $5 for obtaining a certain level of performance on the test, the other half were not offered money.

a)

IV: reading test result

DV: financial support

b)

IV: financial support

DV: reading test result

c)

IV: a group of college students

DV: reading test result

d)

IV: reading test result

DV: a group of college students

83.

In the experiment "Does the volume of caffeinated drink affect your reaction times?"

What is a control variable?

a)

type of drink

b)

reaction times

c)

volume of caffeinated drink

d)

number of bubbles

84.

In the experiment "Does temperature affect the time it takes for a reaction to produce 20 mL of gas", what is the independent variable?

a)

volume of gas

b)

the time it takes for a reaction to produce 20 mL of gas

c)

temperature

d)

mass of gas

85.

Which of the following would result in a test not being fair?

a)

changing the independent variable

b)

changing the control variables

c)

changing the dependent variable

d)

changing the continuous variable

86.

Which of the following would normally go in the second column of a data table?

a)

dependent variable

b)

independent variable

c)

control variable

d)

categoric variable

87.

Identify the independent variable (IV) and the dependent variable (DV) in the following study.

An experiment that tests how quickly different temperatures will dissolve sugar cubes.

a)

IV: temperature

DV: time required for the sugar to dissolve

b)

IV: temperature

DV: amount of sugar

c)

IV: time required for the sugar to dissolve

DV: temperature

d)

IV: time required for the sugar to dissolve

DV: amount of sugar

88.

What is the dependent variable in an experiment measuring the impact of exercise on heart rate?

a)

Type of exercise

b)

Time of day

c)

  1. Heart rate

d)

  1. Duration of exercise

89.

What is the relationship between independent and dependent variables?

a)

Independent variables cause change in dependent variables.

b)

Dependent variables cause change in independent variables.

c)

Independent and dependent variables are both changed by the experimenter.

d)

Independent and dependent variables are both changed by controlled variables.

90.

You want to know which soap works the best to get rid of germs on your hands. You wash your hands with soap A and use a microscope to look at your hands and count the germs you see. Then you do the same thing with soap B.

What is the dependent variable in this experiment?

a)

  1. The type of soap used to wash your hands

b)

  1. The amount of germs left on your hands

c)

  1. The temperature of the water used to wash your hands

d)

  1. The kind of microscope you use to see and count the germs on your hands

91.

Read each instrument to the correct number of significant figures.

(a)  

92.

How many significant figure/s are there in the measured quantity?

0.00212 m

(a)  

93.

How many significant figure/s are there in the measured quantity?

0.212 m

(a)  

94.

How many significant figure/s are there in the measured quantity?

2.1200 × 104 m

(a)  

95.

Round each number to four significant figures.

255.98612

(a)  

96.

Round each number to four significant figures.

0.0004893222

(a)  

97.
Timers at a swim meet used four different clocks to time an event. Which recorded time is the most precise?
a)
55 s
b)
55.25 s
c)
55.2 s
d)
55.254 s
98.

Perform each calculation to the correct number of significant figures.

5.5 × 0.04060 × 0.381

(a)  

99.

Perform each calculation to the correct number of significant figures.

6.55 ÷ 9.97

(a)  

100.

Perform each calculation to the correct number of significant figures.

77.6 + 8.888 + 3.3 + 11.77

(a)  

101.

Perform each calculation to the correct number of significant figures.

33.7 − 3.341

(a)  

102.

Perform the conversion.

4.44 kg to grams

(a)  

103.

Perform the conversion.

994 mm to meters

(a)  

104.

What is the name of the lab equipment in the picture?

(a)  

105.

What is the name of the lab equipment in the picture?

(a)  

106.

What is the name of the lab equipment in the picture?

(a)  

107.

What is the name of the lab equipment in the picture?

(a)  

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