Gr7 - Energy and Mechanical Systems Quiz

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What is thermal transfer?

The movement of heat energy from one area or object to another (correct)

The transfer of kinetic energy from a warmer area to a cooler area

The process of creating heat energy from electrical energy

The conversion of heat energy into kinetic energy

In thermal systems, why is one substance described as being warmer than another?

Because it has more thermal energy (correct)

Because it has more potential energy

Because it has more kinetic energy

Because it has more electrical energy

What happens to heat energy in a thermal transfer process?

It is converted into potential energy

It moves from a warmer area or object to a cooler one (correct)

It is evenly distributed within the same area or object

It is absorbed by the surroundings

What is the role of the electrical element in household appliances like kettles?

It heats up and warms the water or air inside the appliance Signup and view all the answers

What happens to the hot water in the kettle according to the thermal transfer flow diagram?

The water begins to boil Signup and view all the answers

What happens to the heat energy in the hot tea when it is poured into a cup?

It moves from the tea to the surrounding air Signup and view all the answers

How is thermal imaging used in diagnosing injuries in people?

To see where there might be injuries by detecting heat coming off various body parts Signup and view all the answers

What is the relationship between the kinetic energy of particles and the temperature of a substance?

The warmer a substance, the greater kinetic energy its particles have Signup and view all the answers

What is the primary source of initial energy in the electric kettle system?

Electricity supply to the kettle Signup and view all the answers

What is the main purpose of the electrical element in household appliances like geysers, stoves, and kettles?

To heat up and warm the water or air inside the appliances Signup and view all the answers

What is the process of thermal transfer?

The movement of heat energy from one area or object to another Signup and view all the answers

What happens to heat energy in a thermal transfer process?

It moves from a warmer area or object to a cooler one Signup and view all the answers

In a simple electrical circuit, what causes the bulb to shine?

The flow of electric current Signup and view all the answers

What type of energy in the arm muscles of the bowler is transferred to the cricket ball as kinetic energy?

Potential energy Signup and view all the answers

In the context of the cricket example, what energy transfer results in a change in direction and speed of the cricket ball?

Potential energy in the batsman's muscles to kinetic energy in the cricket bat Signup and view all the answers

What is a common example of a simple mechanical system?

Using a pair of scissors to cut paper Signup and view all the answers

In the waterwheel example, what turns the water wheel?

Energy from falling water Signup and view all the answers

What type of energy causes an electric current to flow in an electrical system?

Chemical potential energy in the cell (battery) Signup and view all the answers

In the context of energy transfers in cricket, what is the input when the bowler throws the cricket ball?

Potential energy of the bowler Signup and view all the answers

What is the output when the batsman hits the cricket ball?

Kinetic energy of the cricket bat Signup and view all the answers

In the context of the energy transfers in cricket, what is the process when the ball speeds towards the boundary?

Kinetic energy of the cricket ball Signup and view all the answers

What is the process when the bowler throws the cricket ball in the context of energy transfers in cricket?

Potential energy of the bowler Signup and view all the answers

What is the process when the batsman hits the cricket ball in the context of energy transfers in cricket?

Potential energy of the batsman Signup and view all the answers

What is the output when the ball speeds towards the batsman in the context of energy transfers in cricket?

Kinetic energy of the cricket ball Signup and view all the answers

Gr7 - Energy and Mechanical Systems Quiz

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Questions and Answers

What is thermal transfer?

In thermal systems, why is one substance described as being warmer than another?

What happens to heat energy in a thermal transfer process?

What is the role of the electrical element in household appliances like kettles?

What happens to the hot water in the kettle according to the thermal transfer flow diagram?

What happens to the heat energy in the hot tea when it is poured into a cup?

How is thermal imaging used in diagnosing injuries in people?

What is the relationship between the kinetic energy of particles and the temperature of a substance?

What is the primary source of initial energy in the electric kettle system?

What is the main purpose of the electrical element in household appliances like geysers, stoves, and kettles?

What is the process of thermal transfer?

What happens to heat energy in a thermal transfer process?

In a simple electrical circuit, what causes the bulb to shine?

What type of energy in the arm muscles of the bowler is transferred to the cricket ball as kinetic energy?

In the context of the cricket example, what energy transfer results in a change in direction and speed of the cricket ball?

What is a common example of a simple mechanical system?

In the waterwheel example, what turns the water wheel?

What type of energy causes an electric current to flow in an electrical system?

In the context of energy transfers in cricket, what is the input when the bowler throws the cricket ball?

What is the output when the batsman hits the cricket ball?

In the context of the energy transfers in cricket, what is the process when the ball speeds towards the boundary?

What is the process when the bowler throws the cricket ball in the context of energy transfers in cricket?

What is the process when the batsman hits the cricket ball in the context of energy transfers in cricket?

What is the output when the ball speeds towards the batsman in the context of energy transfers in cricket?

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