How to Measure Grams and Kilograms
Basics on the topic How to Measure Grams and Kilograms
Content
Zuri and Freddie are scientists for the day. They have their white coats on and are ready to collect data on some marine species. They need our help calculating how much several of them weigh. In order to do that we need to know what are units of mass and how to convert units of mass.
What is Mass?
When we measure mass, we are measuring the amount of matter that makes up an object. What are units of mass? Mass must be measured in units of grams and kilograms.
How Much is a Gram?
A gram is one of the units of measurement for mass. We use grams to measure smaller objects, like a small seashell. One small seashell weighs about one gram. When we write grams, we can abbreviate using the letter ‘g’.
How Much is a Kilogram?
A kilogram is also one of the units of measure for mass. We use kilograms to measure larger objects, such as a pineapple. One pineapple weighs about one kilogram. When we write kilograms, we can abbreviate using the letters ‘kg’.
Now that we know a little more about the units used to measure mass of an object, let’s learn about converting kilograms to grams and converting grams to kilograms.
Converting Units of Mass
Since we know what units of measurement are used for mass, let’s see how we can convert them using a units of mass chart, also known as a ratio table. One kilogram is equal to one thousand grams and one thousand grams is equal to one kilogram.
The table below shows metric units of mass, and how to convert three kilogram into grams. Since one kilogram is equal to one thousand grams, we multiply three kilograms by one thousand to get three thousand grams.
If we want to convert fourteen thousand grams into kilograms, we solve it by using the inverse, or opposite, operation. Fourteen thousand grams divided by one thousand is fourteen kilograms.
Mass Units of Measurement and Conversion Summary
What are the units of mass? Mass must be measured in units of weight, such as grams and kilograms. We can convert them using a units of mass chart, also known as a ratio table. We can use a ratio table to convert kilograms to grams and grams to kilograms.
Want some more units of mass practice? You can find examples, worksheets, along with other activities, and exercises.
Transcript How to Measure Grams and Kilograms
Zuri and Freddie are scientists for the day. They have their white coats on and are ready to collect data on some marine species. They need our help calculating how much several of them weigh. Before we start, we need to know "how to measure grams and kilograms". "Matter is anything that has weight or mass and takes up space". When we measure "mass, we are measuring the amount of matter that makes up an object". We measure mass in units called GRAMS and KILOGRAMS. A gram is "a unit used to measure mass". We use grams to measure smaller objects, like a small seashell. When we write grams, we can abbreviate using the letter
How to Measure Grams and Kilograms exercise

How much do the animals weigh?
HintsTry to use a conversion table to help you figure out how many grams are in a kilogram.
We know that there are 1,000 g in a kilogram, so we can find $\frac1 2$ kg by halving 1,000.
Solution To convert kg into g we multiply by 1,000.
 The otter is 8 kg. If we multiply this by 1,000 we get 8,000 g.
 The pelican is 7 kg. If we multiply this by 1,000 we get 7,000 g.
 The beaver is 11 kg. If we multiply this by 1,000 we get 11,000 g.
 The water vole is 2 $\mathbf{\frac{1}{2}}$ kg or 2.5 kg. If we multiply this by 1,000 we get 2,500 g.

Missing masses.
HintsRemember that to convert from kg to g we multiply by 1,000. So 5 kg = 5,000 g.
To convert from g to kg we divide by 1,000. So 30,000 g = 30 kg.
We can find half a kilogram by halving 1,000 because 1 kg = 1,000 g.
Solution Seashell: $\frac1 2$ kg = 500 g (because 1 kg = 1,000 g and 1,000 $\div$ 2 = 500).
 Puffin: 1$\frac1 2$ kg = 1,500 g (because 1 kg = 1,000 g, $\frac1 2$ kg = 500 g, 1,000 + 500 = 1,500).
 Sea Otter: 15 kg = 15,000 g (because 15 x 1,000 = 15,000).
 Sea Lion: 12,000 g = 12 kg (because 12,000 $\div$ 1,000 = 12.
 Penguin: 50,000 g = 50 kg (because 50,000 $\div$ 1,000 = 50.

Using grams and kilograms.
Hints0.5 is the same as $\frac1 2$ so 0.5 kg means $\frac1 2$ kg.
Remember that we can convert kg to g by multiplying by 1,000. 3 kg x 1,000 = 3,000 g.
SolutionHere are the correct answers. We know that 0.5 is the same as $\frac1 2$.

What do the animals weigh together?
HintsTry converting the masses that are in kilograms to grams by multiplying by 1,000. You can move the digits 3 places to the left. For example, 2.630 kg = 2,630 g.
If the total must be 9 kilograms, this means the total in grams must be 9,000.
Solution The two animals that total 6 kg are the otter and the duck. 4.2 kg + 1,800 g is the same as 4,200 g + 1,800 g = 6,000 g. 6,000 g = 6 kg.
 The two animals that total 9 kg are the vole and the beaver. 1,160 g + 7.84 kg is the same as 1,160 g + 7,840 g = 9,000 g. 9,000 g = 9 kg.
 The two animals that total 10 kg are the pelican and the goose. 3,560 g + 6,440 g = 10,000 g. 10,000 g = 10kg.

How much does the animal weigh?
HintsTry making a conversion chart to help you. We know that 1,000 g is equal to 1 kg or 1 kg is equal to 1,000 g.
To convert grams to kilograms we need to divide by 1,000. 5,000 $\div$ 1,000 = 5.
To convert kilograms to grams we need to multiply by 1,000. 5 x 1,000 = 5,000.
Solution The animals that weighs 2 kg is the penguin because 2 kg is equal to 2,000 g.
 We know this because 1,000 g = 1 kg.
 We can also multiply by 1,000. 2 x 1,000 = 2,000.

Make the scales balance.
HintsCould you convert the kg into g to help you solve the problem?
If the totals of two boxes must sum 2 kg, take one of the boxes' mass away from the 2 kg.
The boxes need to balance, so if there are two boxes on one side, their total mass must equal the other side.
Solution To find the value of the first scale: 2 kg = 2,000 g, so 2,000  1,400 = 600 g.
 To find the value of the second scale: 3 kg = 3,000 g, so 3,000  1,850 = 1,150 g.
 To find the value of the third scale: 2 kg = 2,000 g, so 2,000  1,050 = 950 g.
 To find the value of the fourth scale: 1 kg = 1,000 g, so 1,000  460 = 440 g.