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 changes is a chemical change?

Accepted Answer

Burning a candle

Question 4

A cup of whole milk contains 12 g of carbohydrate, 9 g of fat, and 9 g of protein. How many kilocalories does it contain? Use $$4$$ kcal/g for carbohydrates and proteins, $$9$$ kcal/g for fat.

Accepted Answer

$$165$$ kcal

Question 5

Which of the following is an example of kinetic energy?

Accepted Answer

Rollerblading

Question 6

Which of the following is NOT a physical property?

Accepted Answer

Reactivity with acids

Question 7

A gold ingot is hammered into gold leaf. What type of change is this?

Accepted Answer

Physical change

Question 8

Which of the following statements about energy is correct?

Accepted Answer

Kinetic energy is the energy of motion.

Question 9

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 10

Which of the following is a physical change?

Accepted Answer

Boiling water to form steam

Question 11

Which of the following best describes the energy transformation in a hydroelectric dam?

Accepted Answer

Potential energy to kinetic energy

Question 12

Which of the following is a chemical change?

Accepted Answer

Iron rusting in an old car

Question 13

A snack contains 19 g of carbohydrates, 4 g of fat, and 2 g of protein. How many Calories (kcal) does it provide?

Accepted Answer

$$110$$ kcal

Question 14

Which of the following is a physical property?

Accepted Answer

Melting point

Question 15

Which of the following is NOT a chemical property?

Accepted Answer

Density

Question 16

Which of the following best describes the energy content of food?

Accepted Answer

Measured in nutritional Calories (1 Cal = 1000 cal)

Question 17

Which of the following is a correct statement about the classification of matter?

Accepted Answer

Pure substances can be elements or compounds.

Question 18

Which of the following is a chemical property of matter?

Accepted Answer

Reactivity with acids

Question 19

A calorimeter is used to measure which of the following?

Accepted Answer

The energy content of food

Question 20

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

Accepted Answer

Sugar dissolving in water

Matter and Energy: Classification, Properties, and Energy in Nutrition

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