Materials that are poor conductors of heat and that can sometimes block heat transfer are called insulators.
Responda
True
False
Questão 3
Questão
As air is [blank_start]heated[blank_end], its particles gain energy and move [blank_start]further[blank_end] apart, becoming [blank_start]less[blank_end] dense. This hot air is less dense than cool air and so it is pushed [blank_start]upwards[blank_end] by the cooler air around it.
Responda
less
heated
further
upwards
Questão 4
Questão
Mark the correct boxes that show examples of conduction.
Responda
Being warmed by an open fire
Heat flowing from a warm coffee cup to your hands
Water being heated in a saucepan
A saucepan getting hot on a stovetop
Questão 5
Questão
Substances that transfer heat easily are known as conductors.
Responda
True
False
Questão 6
Questão
Convection currents occur in
Responda
Solids
Liquids
Gases
Questão 7
Questão
Radiation transmits heat as [blank_start]invisible[blank_end] waves that travel at the speed of [blank_start]light[blank_end]. Heat travels through empty space between the Earth and the Sun. Heat from the sun cannot be transferred by [blank_start]conduction[blank_end] or convection because there are no [blank_start]particles[blank_end] to vibrate or flow in the vacuum of space.
Responda
invisible
light
radio
light
sound
Lewis Hamilton's racecar
Winx
conduction
radiation
infiltration
particles
dust
snowflakes
Questão 8
Questão
What happens to heat energy when it hits a surface?
Responda
reflected, absorbed and transmitted
reflected, rebounded and absorbed
rebounded, transmitted and infiltrated
Questão 9
Questão
[blank_start]Dark[blank_end] coloured objects heat up more [blank_start]quickly[blank_end] in sunlight than lighter coloured objects. This is because they are good [blank_start]absorbers[blank_end] of radiation, whereas lighter objects [blank_start]reflect[blank_end] most of the heat and don't heat up as quickly.
Responda
Dark
quickly
absorbers
reflect
Questão 10
Questão
Temperature tells us how hot or cold something is.
Responda
True
False
Questão 11
Questão
Heat is.....
Responda
A form of energy that describes the energy of all particles in an object
a measure of the temperature of an object
hot and cold
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