# Lesson 9 Grams and Kilograms, Liters and Milliliters

Let’s explore measurements in grams, kilograms, liters and milliliters.

## Warm-up Which One Doesn’t Belong: Meter, Meter on the Page

Which one doesn’t belong?

2 m

2,000 meters

200 centimeters

## Activity 1 A Whole Lot of Paper Clips

One paper clip weighs 1 gram.

## Problem 1

How many grams are the paper clips in each image?

## Problem 2

The paper clips in this image weigh 1 kilogram.

What is the relationship between kilograms and grams?

## Problem 3

Complete the table with the missing amounts in grams.

kilograms (kg) | grams (g) |
---|---|

## Problem 4

Which weighs more? Be prepared to explain how you know.

8 kilograms or 8 boxes with 100 paper clips in each box

1,250 paper clips or 1 kilogram

500 grams or 2 boxes of 250 paper clips in each box

kilogram or 500 paper clips

## Activity 2 Liters and Milliliters

## Problem 1

Estimate: How many times do we fill the 100-milliliter glass to get 1 liter of liquid? (Assume that each time the liquid is filled to the 100-milliliter line.)

Write a sentence to describe the relationship between milliliters and liters.

## Problem 2

How many times do we need to fill each of these containers to get 1 liter?

A 1-milliliter medicine dropper

A 250-milliliter measuring cup

A 20-milliliter cup

## Problem 3

Complete the table with the missing amounts in liters or milliliters.

liters (L) | milliliters (mL) |
---|---|

## Practice Problem

## Problem 1

A bottle of water holds 250 milliliters.

How many of those bottles does it take to make 1 liter?

How many liters of water does the bottle hold?

Jada’s backpack weighs 3.5 kg. How many grams is Jada’s backpack? Explain or show your reasoning.