WorksheetsLight and energy
Total questions: 21
Worksheet time: 12mins
Heat is...
the amount of thermal energy
the transfer of thermal energy
both are correct
Train tracks have a gap between themselves because...
they contract in hot days
they expand in hot days
they look more beautiful
When two objects are in contact, the transfer of thermal energy is called...
radiation
convection
conduction
When heat is transferred by electromagnetic waves, this is called...
conduction
radiation
refraction
A cork is an example of a...
refraction
insulator
conductor
These ones are not conductors
metals, water and gold.
glass, plastic and rubber.
silver and metal pan.
The hotter molecules rise up and the colder molecules move down. This is called...
conduction
radiation
convection
What's the name of this change of state?
(a)
What's the name of this change of state?
(a)
The atoms in a gas are close to each other.
True
False
In the evaporation, the atoms...
start to move faster
star to move slower
don't move themselves
Heat can't cause chemical changes.
True
False
Thermal energy causes the molecules to vibrate.
True
False
Light travels in curve lines.
True
False
A mobile phone is a natural source of light.
False
True
Translucent objects...
block all the light.
block some light.
don't block the light.
Light is a form or... energy that is transferred through...
radiant/radiation
thermal/conduction
radiant/convection
When light bounces off a surface and it changes direction, this is called...
radiation
reflection
refraction
Mirrors change the direction of the light.
True
False
White light is made of...
black and white
all the different colours
only white light
When light passes from one medium to another and changes direction, this is called...
radiation
reflection
refraction
