We could weigh each object in a group to put them in order but we could also use balance scales. We can work out which object is heavier or lighter out of two objects, then compare it to another object.

In the video, we will use the mass to compare objects, as well as balance scales.

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Question 1

We want to order these animals from $lightest$ to $heaviest$ .


Cockatoo	Sparrow	Pigeon

Which of these animals is the $lightest$ ?
$Cockatoo$
A
$Sparrow$
B
Pigeon
C
Which of these animals is the second $lightest$ ?
$Cockatoo$
A
$Sparrow$
B
Pigeon
C
Which of these animals is the $heaviest$ ?
$Cockatoo$
A
$Sparrow$
B
Pigeon
C

question 2

We want to order these animals according to their mass from $lightest$ to $heaviest$ .

Which of these animals is $lighter$ ? (The pigeon is on the left.)

$Cockatoo$
A
$Pigeon$
B
Which of these animals is $lighter$ ? (The sparrow is on the left.)

$Pigeon$
A
$Sparrow$
B
Which list has the animals in order from $from lightest to heaviest$ ?
$Cockatoo$ , $Pigeon$ , $Sparrow$
A
$Sparrow$ , $Pigeon$ , $Cockatoo$
B

Remember!

To put objects in order by mass, we need to make sure we are using the same unit of measurement, such as grams, for each object we are comparing.

9.03 Order and compare mass

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question 2

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