We included HMH Into Math Grade 4 Answer Key PDF Module 20 Lesson 1 Identify Metric Measurement Benchmarks to make students experts in learning maths.
HMH Into Math Grade 4 Module 20 Lesson 1 Answer Key Identify Metric Measurement Benchmarks
I Can choose an appropriate metric unit and estimate the measure of the length, mass, or liquid volume of an object.
Spark Your Learning
Look at the objects around your classroom. How could you use a part of your hand to describe the width of a staple? How could you use the width of a staple to describe the length of a stapler? How could you use either of those objects to describe the width of a door?
By looking at the staple and when tried measuring it with the part of my hand, it measures 1/4th of my little finger in my hand.
In measuring the length of the stapler, it appears to be 15 times more than the length of staple.
So, now we know the length of a stapler in terms of length of staple. Now, measure the width of a door using the stapler until the nearest multiple length of stapler and then use the length of staple to measure the remaining width of a door.
Turn and Talk How does the length of the staple compare with the length of an inch? When might you use a staple to measure instead of an inch?
When compared the length of the staple with an inch, the staple measures half-an-inch.
We can use staple to measure lengths which are less than an inch.
You learned to measure length using customary units. You can also measure length using metric units.
Metric units of length can be measured with a meter stick. Find objects in the classroom that have a length of about 1 millimeter, 1 centimeter, 1 decimeter, and 1 meter. Record your observations.
My pencil tip has a length of 1 millimeter.
My eraser measures about 1 centimeter.
My pencil measures about 1 decimeter.
My class room door measures about a meter.
A. How could you use items from your desk as a benchmark for a millimeter, a centimeter, and a decimeter?
The items from my desk which are a pencil tip of 1 millimeter, an eraser of 1 centimeter and my pencil of 1 decimeter could be used for measuring the things.
B. How could you describe a benchmark for a kilometer?
Connect to Vocabulary
A kilometer is a metric unit for measuring length or distance. If you have walked 10 minutes, then you have likely walked about 1 kilometer.
When I starts walking from my home, after 10 minutes I will reach school of which the distance between my school and home is about 1 kilometer. This could be a benchmark for a kilometer.
Turn and Talk Think about measuring the length of your classroom in millimeters. What is a better unit to use and why?
The better unit to measure the length of our classroom is meters as in general, classrooms will be around 8 to 10 meters long.
Measuring in millimeters will increase the effort in measuring and error prone.
We can measure it in meters and can convert meters into millimeters if needed after finding the length in meters as we know 1 meter = 1000 millimeters.
Think about measurements you have seen on bottles containing liquid. A milliliter is a metric unit for measuring very small amounts of liquid. A liter is a metric unit for measuring greater amounts of liquid.
Find objects in your classroom that you would measure in milliliters or liters.
The amount of ink in a pen or a refill can be measured in milliliters as it would be only a few milliliters.
A bottle of water can be measured in liters as the bottle can hold more liquid which can be measured in liters.
Think about masses you have seen on food packages. A gram is a metric unit for measuring very small masses. A kilogram is a metric unit for measuring greater masses.
Find objects in your classroom that have masses measured in grams or kilograms.
A coin or a pen or pencil can be measured in grams as they will be around 5 to 20 grams per object.
A chair or school bag with books can be measured in kilograms as it weighs around 1 to 2 kilograms.
About how much water can this spoon hold?
A spoon can hold only 5 milliliters of water.
A spoon is very small and can hold very little amount of water which can be measured in milliliters.
About how much mass does this paperclip have?
Paperclip can have 1 gram of mass.
Paperclip is very small object and also light weight which can be measured in grams only.
On Your Own
It takes Jacklyn about 10 minutes to walk one lap at her favorite park. Which measurement is about the length of one lap?
It is 1 kilometer. We can walk for 1 kilometer in 10 minutes. So, after walking for 10 minutes to complete one lap measures about 1 kilometer.
Reason Brian pours soup into this bowl. Which measurement tells about how much soup is in the bowl?
Justify your answer.
The bowl can contain soup in milliliters of volume.
It cannot be very less as 1 milliliter as it is not a spoon and also a soup bowl cannot hold 2 liters of soup.
So, the exact measurement would be of 300 milliliters.
Amelia buys the apples shown in this basket. Write a metric unit to tell the mass of the apples.
Amelia bought about 5 _________ of apples.
A single apple weighs about 100 to 300 grams.
The basket in the image shown above contains more than 20 apples.
So, it could measure about 5 kilograms of apples.
Open Ended Write and solve a problem that requires you to compare metric measurements of mass.
The problem would be as follows
Amy bought a basket full of oranges which weighs 5 kilograms and Jani bought two apples which weighs about half a kilogram. Compare the weights of things bought by Amy and Jani.
The answer would be as follows
Amy’s basket of oranges weighs 5 kilograms and apples bought by Jani weighs 0.5 kilogram.
So, by comparing, Amy’s oranges weighs nearly 20 times more than Jani’s apples.
I’m in a Learning Mindset!
Do I have a good feeling about my understanding of metric measurement benchmarks? What can I tell myself to stay positive?