WorksheetsUnit 3 - Energy Transfers 1
Total questions: 21
Worksheet time: 11mins
What is one way energy can be transferred?
By reflection
By conduction
By evaporation
By filtration
Which type of energy is NOT mentioned as a store of energy?
Solar
Kinetic
Nuclear
Chemical
What does the efficiency of a system represent?
The total energy input
The amount of energy wasted
The speed of energy transfer
The ratio of useful energy output to total energy supplied
What is conduction primarily associated with?
Vacuum
Solids and liquids
Fluids
Gases
What happens to particles in a fluid when it is heated?
They become denser
They move closer together
They stop moving
They expand and become less dense
Which of the following is a good conductor of heat?
Wood
Plastic
Metal
Glass
What is a Sankey diagram used for?
To show chemical reactions
To measure temperature
To represent energy transfer
To calculate efficiency
What is the main characteristic of thermal insulators?
They transfer heat quickly
They are usually metals
They conduct electricity well
They reduce unwanted energy transfer
What is the process of energy transfer in fluids called?
Conduction
Convection
Radiation
Insulation
Which of the following is an example of energy transfer by radiation?
A hot air balloon rising
A metal rod getting hot
A lamp emitting light
Heating water on a stove
What occurs when part of a fluid is heated?
It contracts
It rises to less dense areas
It solidifies
It becomes more dense
What is the relationship between total energy before and after an event?
Total energy decreases
Total energy increases
Total energy is irrelevant
Total energy is always conserved
What is the primary method of energy transfer in solids?
Evaporation
Radiation
Conduction
Convection
What happens to the molecules in a solid when it is heated?
They vibrate less
They break apart
They vibrate more and transfer heat
They become liquid
What is the main purpose of using insulators in homes?
To increase energy transfer
To reduce unwanted energy transfer
To enhance conductivity
To store energy
What is the primary method of energy transfer in gases?
Conduction
Convection
Radiation
Insulation
Which material is considered a poor conductor of heat?
Aluminum
Glass
Rubber
Copper
What happens to the energy of a system when it is perfectly insulated?
Energy is lost
Energy is gained
Energy remains constant
Energy fluctuates
What is the effect of using double-glazed windows in homes?
To increase heat loss
To reduce heat loss
To enhance sound transmission
To improve air circulation
Which of the following is a characteristic of a good thermal insulator?
High density
Low thermal conductivity
High electrical conductivity
High melting point
What is the primary mechanism of heat transfer in a vacuum?
Conduction
Convection
Radiation
Insulation
