Measurment

Question 1

What is length ?

Answer 1

Length is the distance between two points

Question 2

What is the SI unit ?

Answer 2

Metres

Question 3

What instrument do we use to measure length ?

Answer 3

Ruler , metre stick , vernier callipers , trundle wheel and opisometer

Question 4

What are units for length?

Answer 4

Millimetre (mm) , centimetres (cm) , metres (m) , kilometres (km)

Question 5

What is the function of vernier callipers ?

Answer 5

To measure the diameter of a circular object eg.coin

Question 6

What is he function of a trundle wheel ?

Answer 6

To measure a long curved line eg. Football pitch

Question 7

What is the function of a opisomiter ?

Answer 7

Used to measure the length of a curved line for a short distance eg. Road on a map

Question 8

What does accuracy mean?

Answer 8

Accuracy means how close a measured value is to its actual value.

Question 9

What could lead to errors in a measurement result ?

Answer 9

Parallax error , zero error

Question 10

What is parallax error ?

Answer 10

Reading the measurement form the incorrect angel

Question 11

What is a zero error ?

Answer 11

When you don’t your measurement stat at zero on a measurement instrument

Question 12

How many mm are in cm ?

Answer 12

10

Question 13

How many mm are in a m ?

Answer 13

1,000

Question 14

How many cm are in a m ?

Answer 14

100

Question 15

How many m are in a km ?

Answer 15

1,000

Question 16

How do u convert cm to m ?

Answer 16

Divide by 100

Question 17

How do you covert m to cm

Answer 17

Multiply by 100

Question 18

How do u convert km to m ?

Answer 18

Multiply by 1,000

Question 19

How do u convert m to km ?

Answer 19

Divide by 100

Question 20

How do you convert mm to m ?

Answer 20

Divide by 1,000

Question 21

How you convert m to mm ?

Answer 21

Multiply by 1,000

Question 22

What is area ?

Answer 22

The area of an object is the amount of surface enclosed within its lines

Question 23

How do you calculate area ?

Answer 23

Length x width

Question 24

How do u calculate the area of an irregular shape ?

Answer 24

Trace the outline of the shape onto grid paper , then count the total box (each box is 1cm2), boxes less than half filled are not counted , over half is counted as 1cm2. Boxes half filled count as 0.5cm2

Question 25

What is volume ?

Answer 25

Volume is the amount of space that an object take up

Question 26

How do u read the meniscus ?

Answer 26

You read it at eye level and below the meniscus.

Question 27

How do u find the volume of a regular object?

Answer 27

Length x width x height

Question 28

What is the unit for volume ?

Answer 28

Cm3 and m3

Question 29

What is the instrument used to measure temperature and the SI unit for it ?

Answer 29

Thermometer, degrees Celsius

Question 30

What does a thermometer measure ?

Answer 30

Temperature

Question 31

What instrument is used to measure mass and its SI unit ?

Answer 31

Mass balance , kilograms (kg)

Question 32

What does a mass balance measure?

Answer 32

Mass

Question 33

What is the instrument that measure time and its SI unit ?

Answer 33

Stopwatch , seconds (s)

Question 34

What does a stopwatch measure ?

Answer 34

Time

Question 35

What is precision ?

Answer 35

How close something is together

Question 36

What is accuracy?

Answer 36

How close you are to the target