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WorksheetsScience 7 Light, Heat and Electricity
Total questions: 15
Worksheet time: 30mins
When heat is transferred from the sun to Earth primarily by?
Conduction
Convection
Radiation
None of the above
What is reflection?
The bouncing back of light into the same medium after it falls on a surface.
Light travels in straight line.
Bending of light.
Scattering of light.
What is the temperature when the water boils in degree Celsius?
212℃
100℃
21℃
0℃
Which of the following do not transfer energy easily?
conductors
heat
insulators
plastics
What is light?
A form of energy that lets us see heat
A form of energy that lets us see objects
A source of sunlight
A type of colour
Name the 3 types of different materials that light will or will not pass through?
Transparent, translucent and opaque
Transparent, translucent and oblique
Trains, telephones and objects
Transparent, teams and opaque
Which type of material is this : 'Materials only let some light pass through them'
Transparent
Opaque
Transformation
Translucent
Which object is the best reflector of light?
Paper
Mirror
Wood
Sand
What type of energy do we need to heat an object?
Chemical
Thermal
Light
Electrical
A conductor can be described as...
the limitation of electric current through a circuit with a given amount of voltage
the rate at which a charge crosses a point on a circuit
a material that permits electrons to flow freely from one particle to another
a material that impedes the free flow of electrons from atom to atom or molecule to molecule
An example of a conductor is which of the following?
wool
rubber
snow
silver
An example of an insulator is which of the following?
glass
concrete
dirty water
silver
