Mass : the gram and the kilogram- grade 3

0:00 introduction
0:20 what is mass?
0:32 how much is 1 kilogram?
1:03 how much is 1 gram?
1:27 1kg = 1000g
1:37 some examples
1:58 how do we measure mass?
2:45 how to compare two masses?
3:39 how to know the mass of an object?
4:15 compare the mass of two objects.

#mass
#gram
#kilogram