Chapter 1 - Making Measurements

Question 1

What four quantities will be measured in Chapter One?

Answer 1

• Length
• Volume
• Time
• Density

Question 2

What measurement error did NASA make with the Mars Climate Orbiter?

Answer 2

Used pounds for seconds instead of Newton seconds

Question 3

What can a minor measurement error lead to?

Answer 3

A failed mission costing millions of dollars

Question 4

What is one method to measure length accurately?

Answer 4

Using a ruler

Question 5

What are some precautions to take when measuring length with a wire?

Answer 5

• Wire must be straight
• Start measuring at the zero point
• Ruler must be calibrated properly

Question 6

How can you measure the thickness of a single piece of paper?

Answer 6

Measure the thickness of a stack of papers and divide by the number of papers

Question 7

What is the SI unit for length?

Answer 7

Meter (m)

Question 8

What are prefixes that can be used to denote different lengths in SI units?

Answer 8

• Centi
• Deci
• Milli
• Micro
• Kilo

Question 9

What is the formula for calculating the circumference of a circle?

Answer 9

Circumference = 2πr

Question 10

What is the formula for the volume of a cube?

Answer 10

Volume = length × width × height

Question 11

How do you calculate the volume of an irregular shape?

Answer 11

Using the water displacement method

Question 12

What is the SI unit for volume?

Answer 12

Cubic meter (m³)

Question 13

What method can be used to measure time accurately?

Answer 13

Using clocks (analog or digital)

Question 14

What is a traditional way of measuring time without a clock?

Answer 14

Using a pendulum

Question 15

What is the formula for calculating density?

Answer 15

Density = mass / volume

Question 16

What happens if an object is denser than water?

Answer 16

It will sink

Question 17

What happens if an object is less dense than water?

Answer 17

It will float

Question 18

What is the unit of density if mass is in grams and volume is in cm³?

Answer 18

g/cm³

Question 19

What is the mass of one match if 35 matches weigh 3.4 grams?

Answer 19

0.097 grams

Question 20

How do you convert millimeters to centimeters?

Answer 20

Divide by 10

Question 21

What is the first step in measuring the density of a liquid?

Answer 21

Measure the mass of the liquid

Question 22

What is the second step in measuring the density of a liquid?

Answer 22

Measure the volume of the liquid

Question 23

What is the significance of significant figures in reporting density?

Answer 23

To ensure accuracy in scientific reporting

Question 24

True or False: The SI unit for density can vary based on the units used for mass and volume.

Answer 24

True

Question 25

What is the initial mass of the water in the measuring cylinder?

Answer 25

50 grams

Question 26

What is the final mass of the water after adding it to the measuring cylinder?

Answer 26

70 grams

Question 27

How do you calculate the mass of the water?

Answer 27

Final mass minus initial mass

Question 28

What is the mass of the water calculated in the example?

Answer 28

20 grams

Question 29

How can you measure the volume of a coin using a measuring cylinder?

Answer 29

Final volume minus initial volume

Question 30

What should you do before adding coins to the measuring cylinder?

Answer 30

Measure the initial volume of water

Question 31

How do you determine the volume of one coin?

Answer 31

Divide the difference in volume by the number of coins

Question 32

What is the importance of providing four additional points in a four-point question?

Answer 32

To ensure completeness in the answer

Question 33

What method is used to determine the order of increasing volume of blocks?

Answer 33

Displacement method

Question 34

Which block has the lowest volume based on the example?

Answer 34

Block Z

Question 35

How much did the volume of Block X increase?

Answer 35

30

Question 36

What was the initial volume reading for Block Y?

Answer 36

25

Question 37

What was the final volume reading for Block Y?

Answer 37

85

Question 38

What is the increase in volume for Block Y?

Answer 38

60

Question 39

Fill in the blank: The formula for density is _______.

Answer 39

[mass] divided by [volume]

Question 40

What will be covered in the next chapter?

Answer 40

Formulas related to speed and acceleration