Grade 5: Heat Energy

Question 1

The hotness or coldness of a substance is called?

Answer 1

Temperature

Question 2

Is a measure of the random motion of the particles in a substance.

Answer 2

Temperature

Question 3

How does the movement of water particles in hot water compare to the movement of water particles in cold water?

Answer 3

The water particles in hot water move rapidly than the water particles in cold water.

Question 4

It is an instrument that used to measure temperature?

Answer 4

Thermometer

Question 5

What are the two scales used for measuring temperature?

Answer 5

Celsius and Fahrenheit scales.

Question 6

What is the term used to refer to the marks on a temperature scale?

Answer 6

degree

Question 7

How is the Celsius scale divided, and how many degrees are there in each division?

Answer 7

The Celsius scale is divided into 50 degrees.

Question 8

How is the Fahrenheit scale divided, and how many degrees are there in each division?

Answer 8

The Fahrenheit scale is divided into 120 degrees.

Question 9

What is the term used to describe the transfer of energy from hot water to cold water when particles interact?

Answer 9

This flow of energy is called heat.

Question 10

What is heat?

Answer 10

It refers to the flow of energy from an object with high temperature to an object with low temperature. An object does not possess heat.

Question 11

How is thermal energy in an object related to the random motion of its particles?

Answer 11

The random motion of the particles in an object makes up its thermal energy.

Question 12

Do you know how heat energy is produced?

Answer 12

Heat energy comes from the sun, Earth’s interior, living things, fuels, and machines.

Question 13

What is the primary cause of the heat emitted by the sun, and what process in the sun’s core leads to this heat?

Answer 13

The heat of the sun is caused by the fusion of hydrogen atoms in the sun’s core.

Question 14

What is geothermal energy?

Answer 14

The interactions of particles in Earth’s core produce thermal energy, which reaches the spring as heat. Because the energy being transferred to underground water comes from Earth’s interior.

The word geothermal comes from the Greek words geo (earth) and therme (heat).

Question 15

How can geothermal energy be utilized as a source of energy in both industrial and residential (home) settings?

Answer 15

Geothermal energy can be utilized in both industrial and residential settings through geothermal power plants and direct-use applications.

Geothermal energy is versatile and can be harnessed for electricity generation in industrial applications and for direct heating and cooling in homes through heat pump systems.

Question 16

Where did plants get their energy?

Answer 16

The get it from the sun.

Question 17

Give me an example of source of heat when you cook or grill barbecue?

Answer 17

By using charcoal. Charcoal is a biofuel that is used for heating.

Question 18

What type of fuels that are commonly used to power engines and other machines?

Answer 18

Gasoline, kerosene, diesel, and coal.

Question 19

It is a chemical reaction in which substances react with oxygen to form carbon dioxide and water.

Answer 19

Combustion

Question 20

Heat coming from the sun, Earth’s interior, plants and animals, fossil fuels, biofuels, may be considered as ________.

Answer 20

natural sources.

Question 21

Any humanmade sources, such as machine and electronic gadgets are classified as ______.

Answer 21

artificial sources of energy.

Question 22

How does the absorption of heat take place?

Answer 22

Absorption of heat takes place when an object gets energy from its environment or surroundings.

Question 23

When does the emission of heat occur?

Answer 23

Emission of heat energy occurs when an object gives off or releases energy to its environment or surroundings.

Question 24

How do you know when an object absorbs energy?

Answer 24

An object that absorbs energy increases its temperature.

Question 25

What are the causes of gaps between the rails on railroad tracks and expansion joints in long highways, bridges, and concrete roads?

Answer 25

Thermal expansion and contraction.

Question 26

Do all objects absorb heat equally?

Answer 26

The absorbing power of an object depends on different factors, such as its color and surface texture?

Question 27

What are three ways that heat may be transferred?

Answer 27

conduction, convection, and radiation

Question 28

In solids, heat is transferred between particles that are in contact with one another through __________. The particles conduct heat.

Answer 28

conduction

Question 29

Matter that conducts heat is called a _______.

Answer 29

conductor

Question 30

Give one example of a good conductors of heat.

Answer 30

Metals

Question 31

Some materials are poor conductors of heat. These materials are called ______.

Answer 31

insulators.

Question 32

Give some examples of good insulators?

Answer 32

Paper, wood, plastic, and fiber glass.

Question 33

The transfer of heat by mass motion (up and down movement) in liquid and gas is referred to as ______.

Answer 33

convection

Question 34

The transfer of heat in an empty space is _______.

Answer 34

radiation.

Question 35

How does heat transferred in radiation?

Answer 35

Heat is transferred by radiating waves.

Question 36

A clothes dryer is also called _____.

Answer 36

tumble dryer

Question 37

Three important conditions to evaporate water from wet clothes?

Answer 37

Heat, air movement, and low humidity.