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WorksheetsHeat Transfer
Total questions: 15
Worksheet time: 13mins
Define heat.
Opposite of cold
Property of having a temperature above 30oC
Sensation or feeling of being warm
Thermal energy that is transferred from one substance to another
When you cook pancakes in a hot pan, determine which direction heat moves.
Between the pan and the pancakes, in both directions
From the pancakes to the pan
From the pan to the pancakes
There is no movement of heat
Select two options that best complete the sentence.
Two dinner plates are identical. One is placed in a hot oven and the other is placed in a cold fridge. After ten minutes, the plate in the oven has:
more thermal energy
less thermal energy
particles with more kinetic energy
particles with less kinetic energy
Identify why your hand feels cold as an ice cube melts on it.
Cold energy is transferred from the ice to your hand
Thermal energy can't transfer between your hand and ice
Thermal energy is transferred from your hand to the ice
Thermal energy is transferred from the ice to your hand
Explain why water vapour, a gas, has more thermal energy than an equal amount of ice? Use the following terms: particles, kinetic energy and thermal energy.
Define conduction.
The transfer of heat:
by currents as hot substances rise and cold substances fall
across empty space, such as from the Sun to Earth
between substances in direct contact with one another
from cooler objects to hotter ones
Recall what type of energy is passed between particles during conduction.
Light
Kinetic
Chemical
Speed
A cold metal spoon is placed in a bowl of hot soup. Identify which of the following statements is correct.
Thermal energy is transferred from the spoon to the soup
The particles in the spoon are moving faster than the particles in the soup
Thermal energy is transferred from the soup to the spoon
Thermal energy is not transferred between the soup and the spoon
Select the option that best completes the following sentence.
Insulators:
allow heat to easily flow through them
are usually made of metal
tend to feel very cold or hot when you touch them
do not allow heat to easily flow through them
You step out of the shower onto the bathroom mat. You then walk along the tiles. The tiles feel much colder than the bathroom mat. Explain why.
Identify what convection occurs in
Solids only
Fluids, including liquids and gases
Gases only
Liquids only
Select the option that best completes the following sentence.
A conical flask containing water is heated by a Bunsen burner. The water at the bottom of the flask starts to rise because it is ____________ than the water above it.
colder and more dense
warmer and more dense
colder and less dense
warmer and less dense
Select the option that best completes the following sentence.
Convection currents are circular movements that are created as:
gases maintain a constant temperature
fluids change density
liquids change mass
fluids gain chemical energy
Define radiation.
The transfer of heat:
by the movement of waves, not particles
through a solid
by the flow of a liquid or gas
from hot objects but not cold objects
Infrared waves can pass through some clear objects such as glass. Identify what this is called.
Convection
Absorption
Reflection
Transmission
