Measurement

Measurement

Using scientific equipment to record quantitative observations

Multiple Choice

Which observation involves a measurement using numbers?

• Qualitative observation

• Quantitative observation

Measurement Scales

In order to read a scale, you need to work out what the scale goes up by for each line.

The easiest way to do this is by guessing and checking.

Scale lines often go up by 1, 2, 5 or 10.

Multiple Choice

What does each line go up by in this scale? Click on the image to make it bigger.

• 1

• 2

• 5

• 10

Multiple Choice

What do each of the small lines go up by in this image? Click the image to make it bigger.

• 0.1

• 0.2

• 1

• 10

Measuring Length

Lengths are measured using a ruler or tape measure. It is important to read the ruler with your eye in line with the reading that you take.

When measurements are read from a different angle, the reading is not accurate. This type of reading is called parallax error.

Multiple Choice

What is the correct length for this measurement? Click on the image to make it larger.

• 1.9 cm

• 2.0 cm

• 2.1 cm

Measuring Volume (liquids)

Liquids are measured using a measuring cylinder. The reading is taken from the middle of the liquid. The line is called the meniscus.

The liquid usually curves up. The reading is taken from the bottom of the meniscus.

Very rarely the meniscus curves down. The reading is taken from the top of the meniscus in this case.

Fill in the Blanks

Fill in the Blanks

Multiple Choice

What is the volume in this measuring cylinder? Click on the image to make it bigger.

• 20.4*C

• 24*C

• 28*C

• 29*C

Multiple Choice

What is the volume in this measuring cylinder? Click on the image to make it bigger.

• 30.8 mL

• 34 mL

• 38 mL

• 39 mL

Measuring Temperature

Temperature is measured using a thermometer in degrees Celsius (°C)

It is important to read the ruler with your eye in line with the reading that you take.

Multiple Choice

What temperature does the thermometer in the image read? Click on the image to make it bigger.

• 13°C

• 14°C

• 16°C

• 18°C