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Measure Mass & Volume (Metric System)
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 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 VideoWhat is measurement?ANSWER

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

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

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.

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.

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


After VideoWhat 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.

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.

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.

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.

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
A unit used to measure liquid volume.

Gram
DEFINE
A unit used to measure mass.

Mass
DEFINE
A measure of how much matter an object contains.

Volume
DEFINE
A measure of how much space an object or liquid takes up.

Beaker
DEFINE
A cylindrical container used in science.

Kilogram
DEFINE
A larger unit used to measure mass. Every 1,000 grams can be grouped into 1 kilogram.

Liter
DEFINE
A larger unit to measure volume. Every 1,000 milliliters can be grouped into 1 liter.

Metric System
DEFINE
A system of measurement that uses milliliter, liter, gram, and kilogram as measuring units along with other measuring units.

Milliliter
DEFINE

Reading Material
Download as PDF Download PDF View as Separate PageWHAT IS MEASURING MASS & VOLUME?Grams (g) and kilograms (kg) are used to measure mass. Liters (L) and milliliters (mL) are used to measure volume.
To better understand measuring mass & volume…
WHAT IS MEASURING MASS & VOLUME?. Grams (g) and kilograms (kg) are used to measure mass. Liters (L) and milliliters (mL) are used to measure volume. To better understand measuring mass & volume…LET’S BREAK IT DOWN!
Cooking
Let’s say you want to make macaroni and cheese. You need 500 grams of shredded cheese and 280 grams of macaroni. What is the total mass of these ingredients? You can add measurements just like regular numbers to find out. 500 grams + 280 grams = 780 grams. The total mass is 780 grams. Try this one yourself. Suppose you want to make a batch of macaroni that is a little bit bigger. It will have 750 grams of shredded cheese and 420 grams of macaroni. What is the total mass of these ingredients?
Cooking Let’s say you want to make macaroni and cheese. You need 500 grams of shredded cheese and 280 grams of macaroni. What is the total mass of these ingredients? You can add measurements just like regular numbers to find out. 500 grams + 280 grams = 780 grams. The total mass is 780 grams. Try this one yourself. Suppose you want to make a batch of macaroni that is a little bit bigger. It will have 750 grams of shredded cheese and 420 grams of macaroni. What is the total mass of these ingredients?Sports Drink
Let’s say you want to make a sports drink. You have 1,000 milliliters of water but you only need 750 milliliters of water to make the sports drink. How much water will you have left after you make the drink? You can subtract measurements just like regular numbers to find out. 1,000 mL – 750 mL = 250 mL. Try this one yourself. You have 2,000 milliliters of water but you only need 1,500 milliliters of water to make a sports drink. How much water will you have left after you make the sports drink?
Sports Drink Let’s say you want to make a sports drink. You have 1,000 milliliters of water but you only need 750 milliliters of water to make the sports drink. How much water will you have left after you make the drink? You can subtract measurements just like regular numbers to find out. 1,000 mL – 750 mL = 250 mL. Try this one yourself. You have 2,000 milliliters of water but you only need 1,500 milliliters of water to make a sports drink. How much water will you have left after you make the sports drink?Planting Seeds
Let’s say you have three pots and each pot holds 210 grams of soil. How much soil do you need to fill three pots? You can find the total by multiplying 3 by 210 grams. 210 grams × 3 = 630 grams. You need 630 grams of soil to fill three pots. Try this one for yourself. You have five pots and each pot holds 300 grams of soil. How much soil do you need to fill five pots?
Planting Seeds Let’s say you have three pots and each pot holds 210 grams of soil. How much soil do you need to fill three pots? You can find the total by multiplying 3 by 210 grams. 210 grams × 3 = 630 grams. You need 630 grams of soil to fill three pots. Try this one for yourself. You have five pots and each pot holds 300 grams of soil. How much soil do you need to fill five pots?Candy in a Piñata
Let’s say you have a piñata with 600 grams of candy inside. You want to divide the candy evenly between you and your two friends. How many grams of candy do each of you get? You can divide the candy into three equal groups to find the answer. 600 ÷ 3 = 200. You each get 200 grams of candy. Try this one for yourself. You have a piñata with 800 grams of candy. You want to divide the candy evenly between you and one of your friends. How many grams of candy do each of you get?
Candy in a Piñata Let’s say you have a piñata with 600 grams of candy inside. You want to divide the candy evenly between you and your two friends. How many grams of candy do each of you get? You can divide the candy into three equal groups to find the answer. 600 ÷ 3 = 200. You each get 200 grams of candy. Try this one for yourself. You have a piñata with 800 grams of candy. You want to divide the candy evenly between you and one of your friends. How many grams of candy do each of you get? 
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