What do you estimate is the mass of a regular sized

strawberry?

In this lesson you will learn how to estimate mass in grams

by using benchmarks.

Let’s Review

Mass is how much matter an object contains.

Let’s Review

We can measure the mass of small objects in grams using a balance scale.

A Common Mistake

Confusing mass with size

~1 gram ~1 gram

Core Lesson

What objects have a mass of about 1 gram?

Core Lesson

What objects have a mass of about 10 grams?

Core Lesson

What objects have a mass of about 100 grams?

Core Lesson

What do you estimate is the mass of a small crayon?

10 g 100 g~25 g

Core Lesson

What do you estimate is the mass of a regular sized strawberry?

1 g 10 g~ 6 g

In this lesson, you have learned how to estimate mass in grams by using benchmarks.

Guided Practice

What do you estimate is the mass of a plastic spoon?

1 g 10 g

Extension Activities

Name three objects that have a mass of about 1 gram.

Extension Activities

What do you estimate is the mass of a basketball?

Extension Activities

Which do you estimate has less mass – a balloon or a bag of feathers? Explain your answer.

Quick Quiz

Which object has a mass of about 10 grams?

a) one carrotb) one grain of ricec) one small wooden

blockd) a box of paperclips

Quick Quiz

About how much is the mass of this small bag of popcorn?

a) 50 gramsb) 200 gramsc) 20 gramsd) 1,000 grams