Question 1

A bone sample has a mass of 2.15 g and a volume of 1.40 cm$$^3. $$What is its density in g/cm$$^3$$? Use the formula $$d = \frac{m}{V}.$$

Accepted Answer

$$1.54 g/cm$^3$$

Question 2

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 3

Which of the following is an example of a physical change?

Accepted Answer

Ice melting on the street

Question 4

A gold ingot is hammered into gold leaf. This is an example of:

Accepted Answer

A physical change

Question 5

Which of the following best describes potential energy?

Accepted Answer

Energy stored due to position or composition

Question 6

A bear eats salmon for its fat content. Why does fat provide more energy than carbohydrates or proteins?

Accepted Answer

Fat provides $$9$$ kcal/g, more than twice the energy of carbohydrates or proteins

Question 7

Calculate the total energy in kilocalories for a cup of whole milk containing $$12 g $$carbohydrate, $$9 g $$fat, and $$9 g $$protein. Use $$4$$ kcal/g for carbohydrate and protein, $$9$$ kcal/g for fat.

Accepted Answer

$$165$$ kcal

Question 8

Which of the following is NOT a physical property?

Accepted Answer

Reactivity with acids

Question 9

Which of the following changes is chemical?

Accepted Answer

Butter turns rancid

Question 10

A calorimeter is used to measure:

Accepted Answer

The energy content of food

Question 11

Which of the following statements about energy is correct?

Accepted Answer

The SI unit for energy is the joule (J)

Question 12

A person loses weight when:

Accepted Answer

Food intake is less than energy output

Question 13

Which of the following is an example of kinetic energy?

Accepted Answer

Rollerblading

Question 14

Which of the following is a chemical change?

Accepted Answer

Iron rusting in an old car

Question 15

Which of the following is a physical property of matter?

Accepted Answer

Hardness

Question 16

A snack contains $$19 g $$carbohydrate, $$4 g $$fat, and $$2 g $$protein. How many Calories does it provide? (Use $$1$$ Cal = $$1$$ kcal, $$4$$ kcal/g for carbohydrate and protein, $$9$$ kcal/g for fat.)

Accepted Answer

$$108$$ Cal

Question 17

Which of the following best describes a chemical property?

Accepted Answer

Describes how a substance reacts with other substances

Question 18

Which of the following is a correct statement about the energy content of food?

Accepted Answer

Carbohydrates and proteins provide the same energy per gram

Question 19

Which of the following is an example of a physical change?

Accepted Answer

Boiling water

Question 20

Which of the following is NOT a chemical property?

Accepted Answer

Melting point

Matter and Energy: Physical and Chemical Properties, Changes, and Energy in Nutrition

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