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.

Answer:

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.

Answer:

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.

Answer:

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.

**Talk About It**

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.

Answer:

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.

Answer:

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.”

**Write About It**

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.

Answer:

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.

Answer:

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 _______________.

Answer: A baseball bat has a mass of about 1 **kilogram**.

Question 15.

A penny has a mass of about 1 _______________.

Answer: A penny has a mass of about 1 **gram**.