Lesson · Kindergarten · Mathematics
Heavier or Lighter? The Big Balloon and the Small Rock
- Kindergarten
- Mathematics
- 53 s
- British Columbia
- BCK-MA-14
A big balloon and a small rock go on the two sides of a pan balance: the rock's side goes down, so it is heavier, and the balloon's side goes up, so it is lighter. Swapping them over checks the result, which shows that a bigger thing is not always heavier, and the video ends on the recap that on a balance the heavier side goes down.
Concept: Heavier or lighter: comparing two things on a balance
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In one sentence
The question this lesson answers
Here is a big balloon and a small rock.
Which one do you think is heavier?
Transcript
What the lesson says
Here is a big balloon and a small rock.
Which one do you think is heavier?
A balance can show us which is heavier.
With nothing on it, both sides are level.
Put one thing on each side and watch.
The rock side goes down, so the rock is heavier.
The balloon side goes up, so the balloon is lighter.
Now let's swap them over to check.
The rock goes down again, so it is heavier.
The balloon is bigger, but it is lighter!
A bigger thing is not always heavier.
On a balance, the heavier side goes down.
Curriculum
Where this fits
- British Columbia, Kindergarten
Mathematics, Geometry and measurement: direct comparative measurement (e.g., linear, mass, capacity)BCK-MA-14
Previous: Longer or Shorter? Line Things Up at the Same EndNext: Holds More or Holds Less? Pour to Check
The outcomes and strands follow the British Columbia curriculum.
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