Quiz about Heat grade 7

Question 1

The temperature scale that has lower fixed point 0 degree celsius and the upper fixed point at 100 degree celsius is called

Accepted Answer

Celsius scale

Answer

Kelvin scale

Answer

Absolute scale

Answer

Fahrenheit scale

Question 2

In which of the following modes of heat transfer, do the molecules travel from the hotter part of the body to the colder part?

Accepted Answer

Convection

Answer

Conduction

Answer

Radiation

Answer

All of the three

Question 3

Ventilation in rooms is due to

Accepted Answer

Convection

Answer

Conduction

Answer

Radiation

Answer

All of the three

Question 4

what is the meaning of conduction

Accepted Answer

when heat transfers from objects that are touching

Answer

when heat transfers from objects that are not touching

Answer

heat rise

Answer

cold fall

Question 5

what kind of heat is happening when the sun heats your body

Accepted Answer

radiation

Answer

conduction

Answer

convection

Answer

density

Question 6

heat energy traveling through space is an example of _____

Accepted Answer

radiation

Answer

convection

Answer

density

Answer

conduction

Question 7

A group of friends gather around a fire to stay warm.

Accepted Answer

radiation

Answer

conduction

Answer

convection

Question 8

The man goes to take the hot pot off the stove with his bare hands.

Accepted Answer

conduction

Answer

convection

Answer

radiation

Question 9

Warm air rises and the cool air sinks.

Accepted Answer

convection

Answer

conduction

Answer

radiation

Question 10

What is the transfer of heat by movement of liquids or gases?

Accepted Answer

convection

Answer

conduction

Answer

radiation

Question 11

You are doing your homework at a desk that is underneath a lamp. You start to feel hotter because of _?_ from the lamp.

Accepted Answer

radiation

Answer

conduction

Answer

convection

Question 12

In heat transfer, heat always flows from the _?_ substance to the _?_ substance.

Accepted Answer

hotter to colder

Answer

colder to hotter

Answer

hotter to hotter

Answer

colder to colder

Question 13

Which of the following is the best example of conduction?

Accepted Answer

An egg cooking in a frying pan

Answer

A light bulb warming a lampshade

Answer

Water boiling in a pot

Answer

Gases circulating in the atmosphere

Question 14

The candle will slowly heat the metal and transfer the heat directly to the mans hand. This is an example of _?_.

Accepted Answer

conduction

Answer

convection

Answer

radiation

Question 15

The moving of air in the image is an example of _?_.

Accepted Answer

convection

Answer

radiation

Answer

conduction

Question 16

Which material will heat travel through the fastest?

Accepted Answer

Metal

Answer

Plastic

Answer

Wood

Question 17

How do molecules react when heat energy is added to them?

Accepted Answer

They feel warmer and move faster

Answer

They feel warmer but stay in place

Answer

They feel warmer and move slower.

Answer

Molecules do not react with heat energy only solar energy

Question 18

Which of the following is an example of heat transfer by Conduction?

Accepted Answer

Burning your fingers on a hot iron.

Answer

Heat from a heater warming up your whole house

Answer

Standing by a campfire and feeling the heat.

Answer

All of the above.

Question 19

Which of the following is an example of heat transfer by Convection?

Accepted Answer

Heat from a heater warming up your whole house

Answer

Burning your fingers on a hot iron.

Answer

Standing by a campfire and feeling the heat.

Answer

All of the above.

Question 20

What is the measurement of the average kinetic energy of a substance?

Accepted Answer

Temperature

Answer

Kinetic energy

Answer

Thermal energy

Answer

Potential energy

Question 21

What is a substance that does NOT conduct heat well?

Accepted Answer

Insulator

Answer

Conductor

Answer

Convector

Answer

Radiator

Question 22

What is the total amount of kinetic energy in a substance?

Accepted Answer

Thermal energy

Answer

Potential energy

Answer

Kinetic energy

Answer

Temperature

Question 23

The temperature of a substance increases as___.

Accepted Answer

the average kinetic energy of its particles increases

Answer

the substance expands

Answer

the substance's volume increases

Answer

the substance's mass increases

Question 24

The Law of Conservation of Energy states:

Accepted Answer

Energy cannot be created or destroyed, it can only transformed

Answer

Energy can created or destroyed but not transformed

Answer

Energy can't be created, destroyed or transformed

Question 25

If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ____________

Accepted Answer

they both have an equal temperature

Answer

one reaches a temperature of zero

Answer

one runs out of energy

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