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WorksheetsJunior 2 Physics
Total questions: 15
Worksheet time: 15mins
How is thermal energy transferred between X and Y?
by conduction and convection.
by conduction only.
by convection only.
by radiation only.
A seesaw is unbalanced with two people of different masses sitting equal distances from the centre. Which of the following will result in equilibrium?
The larger person moving further away from the centre.
Moving the smaller person closer to the centre.
Moving the smaller person further from the centre.
The centre of gravity of each object is labelled M. Which is not in equilibrium and will therefore fall over?
A
B
C
D
There is a significant risk to submarines which dive to very great depths. Why is it dangerous to do this?
The temperature of water is too low at greater depths.
The density of water is less at greater depths.
The pressure is too great at greater depths.
The gravitational pull increases at greater depths.
What 3 colors of light would produce white light?
Red, Yellow, Blue
Red, Yellow, Green
Red, Blue, Green
Red, Orange, Yellow
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
A positive charge.
A negative charge.
A neutral charge.
No charge at all.
If you replace the paper clip with a plastic spoon, what will happens?
The bulb doesn't light
The bulb is dimmer
The wires get hot
The bulb still light up
A student placed a pencil in a cup of water. The pencil appears broken because light_________________.
always travels in a straight line
makes the water in the glass evaporate
bends when it passes through water
reflects the pencil on the water's surface
The water is heated strongly at the top, but the ice only melts very slowly. Why does the ice melt so slowly?
Thermal energy always travels upwards.
Hot water is more dense than cold water.
Metal gauze does not allow heat to pass through.
Water is a poor thermal conductor.
In which container does the water exert the greatest liquid pressure on the base of the container?
A
B
C
A.The liquid pressure is the same in all three.
According to the Law of reflection, a light ray striking a mirror_______________________.
continues moving through the mirror in the same direction
reflects the mirror at the same angle it hits.
reflects the mirror toward the direction it came from
moves into the mirror at a slightly different angle
A parallel circuit is set up using 3 similar lightbulbs as shown in the diagram. If the ammeter reading of A3 is 0.2 A, what is the reading of Ammeter A1 is _________ A
0.1 A
0.2 A
0.4 A
0.6 A
What happens to blue light when it hits a shirt that appears blue?
The light is reflected.
The light is absorbed.
The light is refracted.
The light is blocked.
The unit "kWh" is the unit of ___________.
power
energy
current
voltage
If the density of a bar of gold is 19.3 g/cm3and you cut it into 4 pieces, what is the density of each piece of gold?
4.825 g/cm3
9.65 g/cm3
19.3 g/cm3
38.6 g/cm3
