Grams and kilograms
We weigh light things in grams, g. An egg weighs about 60 grams. We weigh heavy things in kilograms, kg. A watermelon weighs about 5 kilograms. 1,000 grams make 1 kilogram. So 2 kg is 2,000 g. We ask: How heavy is it? We answer: It weighs 60 grams. We use scales to weigh things. A heavy thing makes the scales go down.
Dad, how heavy is this bag of rice?
It weighs one kilogram.
And the cheese in your hand?
It weighs 250 grams. That is light.
Now I carry the rice. It is heavy!
Habiba helps in the kitchen. An egg weighs about 60 grams, so three eggs weigh 180 grams. A bag of flour weighs 1 kilogram. Her school bag is heavy: it weighs 3 kilograms. A feather is so light that she cannot feel its weight. She uses grams for light things and kilograms for heavy things.
Heavy or light? The child finds five things at home (a spoon, a book, a bag of rice, an apple, a bottle of water) and guesses their order from lightest to heaviest. A grown-up checks with kitchen scales. The child writes the weights in grams or kilograms.