# McGraw Hill My Math Grade 3 Chapter 11 Lesson 3 Answer Key Estimate and Measure Mass

All the solutions provided in McGraw Hill My Math Grade 3 Answer Key PDF Chapter 11 Lesson 3 Estimate and Measure Mass will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 3 Answer Key Chapter 11 Lesson 3 Estimate and Measure Mass

Mass is the amount of matter, or material in an object. One metric unit of mass is the kilogram (kg). These are items that have a mass of about 1 kilogram.

Measure It

What does 1 kilogram feel like?
1. Find three objects and estimate whether each feels less than, about, or more than 1 kilogram. Write the name of the object and your estimate. An example is shown.

The mass of the baseball is less than a kilogram.
The mass of 400 pennies is more than a kilogram.
The mass of a dictionary is more than a kilogram.

2. Place 8 rolls of pennies, on one side of the 4 bucket balance. Check each estimate by placing one object on the other side of the balance. Record your results in the table.
8 rolls of pennies is equal to 400 pennies which is greater than a kilogram.

Try It

What does 1 gram feel like?
These are items that have a mass of about 1 gram.

1. Find three objects that you think would best be measured in grams. Write the name of the object and your estimate. An example is shown.

2. Place a base-ten cube on one side of the bucket balance. Check each estimate by placing one object on the other side of the balance. Record your results in the table.
The mass of dollar bill is equal to 1 gram.
The mass of base ten cube is greater than 1 gram.
The mass of Base ten cube is greater than mass of a dollar pin.

Question 1.
What characteristics were shared by the objects that you chose to measure the mass of in grams?
Answer: The mass of each object is shared. Comparing the mass of the objects in the bucket balance we can measure the mass in grams.

Question 2.
Mathematical PRACTICE Draw a Conclusion Does a large object always have a greater mass than a small object? Explain.
Answer: Large objects always have a greater mass than small object.

Practice It

Circle the better unit to measure each mass.

Question 3.
toothbrush
gram
kilogram
Answer: The better unit to measure the mass of the toothbrush is the gram.

Question 4.
television
gram
kilogram
Answer: The better unit to measure the mass of the television is a kilogram.

Question 5.
shovel
gram
kilogram
Answer: The better unit to measure the mass of the shovel is a gram.

Question 6.
teddy bear
gram
kilogram
Answer: The better unit to measure the mass of the teddy bear is a kilogram.

Question 7.
pair of sunglasses
gram
kilogram
Answer: The better unit to measure the mass of the pair of sunglasses is a gram.

Question 8.
lawn mower
gram
kilogram
Answer: The better unit to measure the mass of the lawn mower is a kilogram.

Circle the better estimate for each mass.

Question 9.

5 g
5 kg
Answer: The better estimated mass of the watermelon is 5 kg.

Question 10.

50 g
5,000 g
Answer: The better estimated mass of the hairbrush is 50 g.

Question 11.

4 g
4 kg
Answer: The better estimated mass of the fish is 4 kg.

Question 12.

15 g
15 kg
Answer: The better estimated mass of the cycle is 15 kg.

Question 13.

900 g
900 kg
Answer: The better estimated mass of the car is 900 kg.

Question 14.

5 kg
5 g
Answer: The better estimated mass of the coin is 5 g.

Apply It

Question 15.
A store in the mall sells fresh baked pretzels. Would it be more reasonable to measure the mass of a baked pretzel in grams or kilograms? Explain.

Answer: It is reasonable to measure the mass of a baked pretzel in grams than kilograms.

Question 16.
Mathematical PRACTICE Model Math Mrs. Charles grows squash in her garden. Which would be a more reasonable estimate for the mass of a squash; 500 grams or 500 kilograms? Explain.

Given,
Mrs. Charles grows squash in her garden.
It is reasonable to estimate the mass of a squash in 500 grams than 500 kilograms.

Question 17.
Mathematical PRACTICE Reason A bag of potatoes has a mass of about 3 kilograms. Name two other items that have about the same mass. Explain your reasoning.
The mass of onions will be similar to the weight of potatoes.
The mass of watermelon is similar to 3 kgs mass of potatoes.

Question 18.
Mathematical PRACTICE Find the Error Jack held an apple in his hand. He said, “This apple feels like it has a mass of 100 kilograms.” Explain his error. What should Jack have said?
Answer: The mass of an apple will be in grams not in kilograms. So, Jack should have said, “This apple feels like it has a mass of 100 grams.”

Question 19.
What is different about the items you measured in grams and those you measured in kilograms?
Answer: The grams are used to measure the small objects and kilograms are used to measure the big objects.

### McGraw Hill My Math Grade 3 Chapter 11 Lesson 3 My Homework Answer Key

Practice

Circle the better unit to measure each mass.

Question 1.
bowling ball
gram
kilogram
Answer: The better unit to measure the weight of the bowling ball is the kilogram.

Question 2.
zebra
gram
kilogram
Answer: The better unit to measure the weight of the zebra is the kilogram.

Question 3.
cell phone
gram
kilogram
Answer: The better unit to measure the weight of the cell phone is a gram.

Question 4.
laptop computer
gram
kilogram
Answer: The better unit to measure the weight of the laptop computer is the kilogram.

Question 5.
pair of socks
gram
kilogram
Answer: The better unit to measure the weight of the pair of socks is a gram.

Question 6.
a marble
gram
kilogram
Answer: The better unit to measure the weight of the marble is a gram.

Circle the better estimate for each mass.

Question 7.

4 grams
4 kilograms
Answer: The mass of the object is 4 grams.

Question 8.

2 grams
2 kilograms
Answer: The mass of the object is 2 grams.

Question 9.

20 grams
20 kilograms
Answer: The mass of the object is 20 kilograms.

Question 10.

3 grams
3 kilograms
Answer: The mass of the object is 3 kilograms.

Problem Solving

Question 11.
Mathematical PRACTICE Use Mental Math Dylan is making a casserole that serves 4 people. The recipe calls for shredded cheese. Would it be more reasonable for Dylan to measure the mass of the cheese in grams or kilograms? Explain.
It is more reasonable to measure the cheese in grams. The recipe serves only 4 people, so a kilogram or more would be too much cheese.

Question 12.
Paulette needs help moving her file cabinet. Is 40 grams or 40 kilograms a more reasonable estimate for the file cabinet’s mass? Explain.
40 kilograms is a more reasonable estimate than 40 grams. Paulette would not need help moving something with a mass of only 40 grams.

Vocabulary Check

Choose the correct word to complete each sentence.
mass
gram
kilogram

Question 13.
The amount of matter an object has is its ________________.
Answer: The amount of matter of an object has is its mass.

Question 14.
A baseball bat has a mass of about 1 _______________.

Question 15.
A penny has a mass of about 1 _______________.