Idea 15of 22Builds onKilo, centi, milli: one pattern for every unit
Grams and kilograms
How many grams balance a kilogram?
Today you'll discover
- what a pan balance shows
- how many grams make a kilogram
- how to write kilograms in grams
Think firstA 1 kg bag of flour on a balance
How many 100 g blocks will balance the 1 kg bag?
Decide first, then press Next. Watch which way the beam tips.
A pan balance. On the left pan, a 1 kg bag of flour; the right pan is empty, so the beam tips down on the left. Five 100 g blocks go on the right: 500 g, not enough yet. With ten blocks the beam is level: 10 × 100 g = 1000 g = 1 kg. The last step shows a 2 kg bag of apples.
See the whole ideathe big idea and the key word, in one place
The big idea
A kilogram is 1000 grams, so 2 kg is 2000 g.
Compare themA paper clip: about 1 g. A full 1 L water bottle: about 1 kg, as heavy as 1000 paper clips.
Easy to get wrongKilo is 1000 for grams too: 2 kg is 2000 g, not 200 g.
Key word
- kilogram
- 1000 grams, written kg; about a full 1 L water bottle
Ready to use it?
- Write kilograms in grams.
- Choose g or kg for an object.