Measurements AND SI Units

The diagram shows part of a ruler. The ruler is used to find the length of a nail.

What is the length of the nail?

• 2.2 cm

• 2.7 cm

• 3.2 cm

• 3.7 cm

Four athletes run twice around a track. The table shows their times at the end of each lap. Which athlete runs the second lap the fastest?

• A

• B

• C

• D

The diagrams show the readings on a measuring cylinder before and after a small metal cube is added.

How many MORE identical cubes can be added to the cylinder, without causing the water to overflow? DO NOT INCLUDE THE CUBE ALREADY IN THE CYLINDER.

• 1

• 2

• 3

• 4

A cylindrical can is rolled along the ruler shown in the diagram.

The can rolls twice. What is the circumference (distance all round) of the can?

• 13 cm

• 14 cm

• 26 cm

• 28 cm

The SI unit for measuring mass is the
 __?__.

• meter (m)
• liter (L)
• cubic meter (m³)
• kilogram (kg)

What SI unit is used to measure electric current?

• seconds
• amperes
• Kelvin
• mole

T or F: Square meter is a SI derived unit to measure the area of a 2-dimensional figure.

• True

• False

SI stands for ___.

• Sports Illustrated

• Scientific Notation

• International System (of measurements)

• Instructional System (of measurements)

Which of the following pairs of physical quantity and SI unit is correct ?

• Mass - SI unit : Gram
• Time - SI unit : Hour
• Electric current - SI unit : Volt
• Temperature - SI unit : Kelvin

What is base quantities ?

• the branch of science concerned with the nature and properties of matter and energy
• the branch of science that deals with the identification of the substances of which matter is composed
• physical quantities that cannot be defined in terms of other physical quantities