This lesson covers the concept of mass, focusing on metric units like grams and kilograms. It explains how mass is the amount of matter in an object, using examples like a bowling ball and a basketball. The lesson details metric conversions and compares metric measures to US standard measures. It also describes how to measure mass using a pan balance and spring scale, and guides on choosing the appropriate unit for different objects. The difference between mass and weight is clarified, emphasizing that mass is not affected by gravity, unlike weight. The lesson concludes with a preview of the next topic on liquid volume and mass.

What is the basic metric unit for measuring mass?

• Kilogram

• Hectogram

• Decagram

• Gram

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CCSS.3.MD.A.2

How many grams are in one kilogram?

• 10 grams

• 1000 grams

• 10000 grams

• 100 grams

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CCSS.4.MD.A.1

How many hectograms are in one kilogram?

• 10 hectograms

• 100 hectograms

• 1000 hectograms

• 1 hectogram

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CCSS.4.MD.A.1

Approximately how many pounds are in one kilogram?

• 1 pound

• 2.5 pounds

• 5 pounds

• 10 pounds

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CCSS.4.MD.A.1

What would be a smarter unit to measure a fishbowl's mass?

• Grams

• Ounces

• Kilograms

• Pounds

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CCSS.3.MD.A.2

What is the mass of a tiny paper clip approximately?

• 100 grams

• 1 gram

• 10 grams

• 1 kilogram

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CCSS.3.MD.A.2

Which tool can be used to measure mass by comparing two objects?

• Ruler

• Thermometer

• Pan balance

• Spring scale

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CCSS.3.MD.A.2

What does a pan balance measure?

• Volume

• Mass

• Density

• Weight

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CCSS.3.MD.A.2

Is mass affected by gravity?

• Only in space

• Yes

• No

• Only on Earth

Which of the following has more mass?

• Cannot be determined

• Both have equal mass

• A can of dog food

• A balloon filled with air

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CCSS.3.MD.A.2