Learning Target: I can estimate the mass of an object using grams and kilograms.

Example

Manuel and his family are having a picnic at the beach. The picnic basket's mass is 5 kilograms. One of Manuel's grapes is about 1 gram.

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Gram (g) and kilogram (kg) are metric units used when measuring the mass, or the amount of matter, in an object.

1 kilogram = 1,000 grams

Let's Practice Together

Choose the unit you would use to measure the mass of each: g or kg.

1. a pen

2.  a couch

3.  an orange

Your Turn 

Complete.

4.  7 kg = _______ g

5.  30 kg = _________ g

6.   3,000 g = _________ kg

Check for Understanding

Compare. Use >, <, or =.

1.  100 kg ______ 10 g

2.  2,000 g ______ 5 kg

3.  4,000 g  ______ 4 kg

Answers

1.  g

2.  kg

3.  g

4.  7,000

5.  30,000

6.  3

Check for Understanding

1.  >

2.  <

3.  =