Measurement is something we use to find the size or amount of something.

What are some things that you have measured before? What units did you use?

I have measured flour for a cake in cups. I have measured wood for a box that I made in centimeters.

What are some of the units used in the metric system and what does each measure?

Centimeters are used to measure the length of objects. Meters are used to measure lengths that are longer, such as the length of a classroom.

How do you measure the length of an object in centimeters?

You use a ruler marked in centimeters. You line the 0 point on the ruler with one end of the object. You look at the other end of the object to see what measurement it matches up with on the ruler.

Why is knowing the exact measurement of objects important?

If I don't measure the length of wood exactly before I cut it, the pieces may not fit together.

What is mass and what are some of the units we use in the metric system to measure mass?

Mass is a measure of how much matter an object contains. We use grams and kilograms to measure mass.

What is liquid volume and what are some of the units we use in the metric system to measure liquid volume?

Liquid volume is a way to measure the amount of liquid by giving a measurement of how much space it occupies. We use liters and milliliters to measure liquid volume.

What unit would you use to measure the mass of an elephant, grams or kilograms? Why?

An elephant is large and contains a lot of matter. If I used grams, the number of grams would be gigantic. If I use kilograms, I will get a number of kilograms that is easier to work with.

What unit would you use to find the liquid volume of the water in an eyedropper, liters or milliliters? Why?

The amount of water in an eyedropper is very small so you would want to use a milliliter which is a small unit of liquid volume. A liter is a unit that would be too big.

A scientist needs to put 400 grams of salt into a container. She has already put 175 grams of salt into the container so far. How many more grams of salt does she need to put into the container? Explain how you solved the problem.

The scientist needs to subtract the amount of salt she has already put into the container from the total amount of salt she needs to put into the container. 400 – 175 = 225. She needs to put 225 more grams of salt into the container.

Measure Mass & Volume (Metric System)

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What you will learn from this videoWhat you will learn

We’ll learn how to use the metric system to measure mass and volume.
How we can use math operations with these measurements.
We’ll see that this knowledge can help us cook food, plant seeds, and even make a chemical reaction!

Discussion Questions
- Before Video
  What is measurement?ANSWER
  - Measurement is something we use to find the size or amount of something.
  What are some things that you have measured before? What units did you use?ANSWER
  - I have measured flour for a cake in cups. I have measured wood for a box that I made in centimeters.
  What are some of the units used in the metric system and what does each measure?ANSWER
  - Centimeters are used to measure the length of objects. Meters are used to measure lengths that are longer, such as the length of a classroom.
  How do you measure the length of an object in centimeters?ANSWER
  - You use a ruler marked in centimeters. You line the 0 point on the ruler with one end of the object. You look at the other end of the object to see what measurement it matches up with on the ruler.
  Why is knowing the exact measurement of objects important?ANSWER
  - If I don't measure the length of wood exactly before I cut it, the pieces may not fit together.
- After Video
  What is mass and what are some of the units we use in the metric system to measure mass? ANSWER
  - Mass is a measure of how much matter an object contains. We use grams and kilograms to measure mass.
  What is liquid volume and what are some of the units we use in the metric system to measure liquid volume?ANSWER
  - Liquid volume is a way to measure the amount of liquid by giving a measurement of how much space it occupies. We use liters and milliliters to measure liquid volume.
  What unit would you use to measure the mass of an elephant, grams or kilograms? Why?ANSWER
  - An elephant is large and contains a lot of matter. If I used grams, the number of grams would be gigantic. If I use kilograms, I will get a number of kilograms that is easier to work with.
  What unit would you use to find the liquid volume of the water in an eyedropper, liters or milliliters? Why?ANSWER
  - The amount of water in an eyedropper is very small so you would want to use a milliliter which is a small unit of liquid volume. A liter is a unit that would be too big.
  A scientist needs to put 400 grams of salt into a container. She has already put 175 grams of salt into the container so far. How many more grams of salt does she need to put into the container? Explain how you solved the problem.ANSWER
  - The scientist needs to subtract the amount of salt she has already put into the container from the total amount of salt she needs to put into the container. 400 – 175 = 225. She needs to put 225 more grams of salt into the container.
Vocabulary
- Milliliter DEFINE
- Gram DEFINE
- Mass DEFINE
- Volume DEFINE
- Beaker DEFINE
- Kilogram DEFINE
- Liter DEFINE
- Metric System DEFINE
Reading Material
Practice Word Problems
Practice Number Problems
Lesson Plan
Teacher Guide
Assessment
Online Quiz Game Quiz PDF Exit Ticket