7)When you place a metal saucepan on the heating element of a stove, heat is transferred from the element to the saucepan by: Areflection.
Bconvection.
Cconduction.
Dradiation.

8)Which of the following can be described as being luminous :
AStreetlights (turned on)
BA road sign
CThe moon
DWater

9)In the burning of fireworks during New Year displays, chemical potential energy is converted into:
Aheat, light and sound energy.
Blight and sound energy.
Csound and heat energy.
Dgravitational potential energy and light.

10)Which would be the most appropriate description of how energy is distributed when a torch is turned on?
A70% light energy, 30% thermal energy
B70% thermal energy, 30% electrical energy
C65% light energy, 30% thermal energy
D40% thermal energy, 55% light energy

Explanation:

7.Conduction

Assuming the pot is cold and the heating element is hot: Heat will be transferred from the element to the pan via conduction because they are in contact with one another.

8.  C The moon

9.  A heat, light and sound energy.

When fireworks explode, chemical energy is transformed into thermal energy, mechanical energy, radiant energy, and sound energy.

10.A 70% light energy, 30% thermal energy

When the flashlight is turned on, the chemical energy is first transformed into electrical energy and then into light energy.

If number 10 is not correct then the answer is  C.

vapour or gas assuming atmospheriv pressure

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.