Ch. 1.5

Question 1

Throughout history, people have been using different ways to make measurements. The older ways were usually ______________ _____________________ than the modern ones.

Answer 1

Less accurate

Question 2

Measurements:
Length:
Past: ______________
Now: _________________

Answer 2

Arms, ruler

Question 3

Measurements:
Time:
Past: ________________
Now: ____________________

Answer 3

Sundial, watch/ clock

Question 4

Instruments used for measuring length
1.
2.
3.

Answer 4

1. Metre rule
2. Half-metre rule
3. Measuring tape

Question 5

When measuring the length of an object with a ruler, we should read the scale from ____________________ to make sure that we take an accurate reading.

Answer 5

Vertically above

Question 6

Units of measuring length:
1.
2.
3.
4.

Answer 6

1. Metres (m)
2. Centimetres (cm)
3. Millimetres (mm)
4. Kilometres (km)

Question 7

1 km= ?m

Answer 7

1000

Question 8

1 m= ? cm

Answer 8

100

Question 9

1 cm= ? mm

Answer 9

10

Question 10

Measuring volume:
Units of measuring:
1. 
2.
3.
4.

Answer 10

1. Millilitres (mL)
2. Litres (L)
3. Cubic centimetres (cm3)
4. Cubic metres (m3)

Question 11

1 L= ? mL

Answer 11

1000

Question 12

1 mL= ? cm3

Answer 12

1

Question 13

1 m3= ? cm3

Answer 13

1,000,000

Question 14

What is the curved surface of a liquid in a measuring cylinder called?

Answer 14

Meniscus

Question 15

To take an accurate reading with a measuring cylinder, our eyes should be _________________.

Answer 15

At the same level as the bottom of the meniscus

Question 16

How do we measure the volume of a rectangular/ cube object?

Answer 16

1. Measure the length, width and height

2. Calculate length X width X height

Question 17

How to measure the volume of a small irregular object?

1. Add water to a ______________ until it is about ____________ and record the volume of water
2. Tie object with a _______________
3. Lower object into water in the _________________ and record volume of water
4. __________________-_________________=volume of object

Answer 17

Measuring cylinder, half-full, string, measuring cylinder, original volume, new volume

Question 18

Measuring the volume of a large irregular object

1. Tie object with string
2. Place a ________________ ______ near edge of bench with pout pointing ______________
3. Hold __________________ ______________ below the spout of the _________________ ____________ and pour water into ______________ _______ until a little water runs out of the spout and pour the water away
4. Hold the empty ______________ ________ below the spout and slowly lower the object into the water in the ______________ _______
5. Measure volume of water that ___________ _______ of ________________ ______.

Answer 18

Displacement can, outwards, measuring cylinder, displacement can X2, measuring cylinder, displacement can, flows out, displacement can

Question 19

Instruments for measuring mass
1. 
2.
3.
4.
5.
6.

Answer 19

1. Triple beam balance
2. Spring balance
3. Lever balance
4. Top pan balance
5. Electronic balance
6. Bathroom scale

Question 20

Which type of instrument used for measuring mass is the most precise and commonly used in the lab?

Answer 20

Electronic balance

Question 21

What is the precision of an electronic balance?

Answer 21

Up to 2 decimal places

Question 22

The ______________/ ____________ button on an electronic balance sets the balance reading to zero.

Answer 22

Re-zero/ tare

Question 23

When is the ‘re-zero’/ ‘tare’ function useful?

Answer 23

When we’re measuring the mass of a substance in a container.

Question 24

Steps of using an electronic balance for measuring the mass of a substance in a container

1. Put ___________ ______________ on balance
2. Press the ‘_________’ button to set the balance reading to zero so that the mass of the container is not counted
3. Add the substance to the container and you can thus ___________ measure the mass of the substance

Answer 24

Empty container, re-zero, directly

Question 25

Units for measuring mass
1.
2.
3.

Answer 25

1. Kilograms (kg)
2. Grams (g)
3. Milligrams (mg)

Question 26

1 kg= ? g

Answer 26

1000

Question 27

1 g= ? mg

Answer 27

1000

Question 28

The temperature of an object tells us ______ _____ ____ ______ it is.

Answer 28

How hot or cold

Question 29

Unit for measuring temperature

1.

Answer 29

Degrees Celsius (*C)

Question 30

Instruments for measuring temperature
1.
2.

Answer 30

1. Thermometer

2. Temperature sensor+data=logger

Question 31

Name the two types of thermometers mot commonly used in a lab and their range of temperature.

1. (?-?*C)
2. (?-?*C)

Answer 31

1. Coloured alcohol thermometer (-10-110 *C)

2. Mercury thermometer (0-360 *C)

Question 32

__________ can be transferred to a computer for ____________ when we use a temperature sensor and data logger.

Answer 32

Data, analysis

Question 33

Using a temperature sensor and data-logger offers us __________ ______________.

Answer 33

Precise measurement

Question 34

To take an accurate reading of a thermometer, our eyes should be at __________ level as the ________________in the thermometer.

Answer 34

Same, liquid level

Question 35

Different thermometers have different _________________________.

Answer 35

Measuring ranges

Question 36

Instrument used for measuring time in lab:

1.

Answer 36

1. Stopwatch

Question 37

How accurate is a stopwatch?

Answer 37

Up to one hundredth of a second.

Question 38

Units of measuring time:
1.
2.
3.

Answer 38

1. Seconds (s)
2. Minutes (min)
3. Hours (h)

Question 39

1 hour= ? min

Answer 39

60

Question 40

1 min= ? s

Answer 40

60

Question 41

Consistency=?

Answer 41

Accuracy

Question 42

Sometimes, there are ____________ when we make measurements. To reduce them, we should often repeat the measurement several times then use the __________ __________ of a few trials to make the results more ______________.

Answer 42

Errors, average results, reliable

Question 43

We can use _______________ _____________________ for precise measurements.

Answer 43

Electronic instruments