KS3 P6 Revision

KS3 P6 Revision

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Guide

We will now recap some of the key concepts from this topic.

Please make notes in your exercise book as I explain.

Go For It

Now is your chance to prove how much you can remember from this topic

Multiple Choice

What is energy?

• Kinetic

• Movement

• Ability to do work, son.

• Thermal energy

Multiple Choice

What is a substance that does NOT conduct heat well?

• Conductor

• Insulator

• Convector

• Radiator

Multiple Choice

Which box has a higher density?

• Box A

• Box B

• cannot be determined

• they are the same

Multiple Choice

Put the liquids in order from most dense to least dense?

• 4, 3, 2, 1

• 1, 2, 3, 4

• 3, 4, 2, 1,

• 4, 3, 1, 2

Multiple Choice

Warm air is __________ dense than cold air and rises creating convection currents.

• more

• less

Multiple Choice

All of the following are examples of convection currents, excerpt:

• Warm air rising in a house

• Cold water sinking to the bottom of the lake

• Water flowing through pipes

• Steam from hot soup rising into the air

Multiple Choice

Convection currents occur:

• Only in liquids

• When a dense substance is warmer than a less dense substance

• In both liquids and gases

• Weakly in solids

Multiple Choice

Heat from the Sun reaches Earth through which type of heat transfer?

• Conduction

• Radiation

• Convection

• All of the above

Multiple Choice

When you heat a pot on a stove, the handle gets warm. Which type of heat transfer is responsible?

• Conduction

• Radiation

• Convection

• All of the above

Multiple Choice

When two things are the same temperature:

• They have the same number of molecules

• Their molecules stop moving

• Their molecules move at the same average speed

• Heat transfer between the two things stops

Multiple Choice

What happens when a cold drink sits in a hot room?

• It remains cold

• It gets warmer

• It starts boiling

• It starts to freeze

Multiple Choice

What happens when a cold drink sits in a hot room?

• It remains cold

• It gets warmer

• It starts boiling

• It starts to freeze

Multiple Choice

The faster an object moves, the ________ kinetic energy it has.

• more

• less

• none of the above

• all of the above

Multiple Choice

Which has a greater impact on KE?

• mass

• velocity

Multiple Choice

The SI unit in which kinetic energy is measured is

• Newton

• Kilogram

• Joules

• Metres per second

Multiple Choice

Calculate the kinetic energy of a moving 4 kg object travelling at a velocity of 3 m/s.

• 18 J

• 36 J

• 12 J

• 6 J

Multiple Choice

How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s?

• 27 J

• 18 J

• 9 J

• 2 J

Multiple Choice

1. A _________is a simple machine with a fulcrum and a rigid bar.

• Pivot

• Lever

• Wedge

Multiple Choice

A seesaw is unbalanced with two people of different masses sitting equal distances from the center. Which of the following will result in equilibrium?

• The larger person moving further away from the center.

• Moving the smaller person closer to the center.

• Moving the smaller person further from the center.

• Making the larger person do nothing.

Multiple Choice

Who discovered Hooke's law?

• Robert Hooke

• Charlie

• Newton

Multiple Choice

If the original length of a spring is 20m and its extended length is 30m. What is the extension?

• 20m

• 12m

• 75m

• 45m

• 10m

Multiple Choice

In which of these cases is work being done?

• A student sleeps

• A student pushes a locked door that does not move

• a student carries his chair into another room

• A student sits on the carpet

Multiple Choice

Which of the following is the best example of work being done. 

• doing homework
• lifting a box
• pushing a stationary box
• holding a box

Multiple Choice

Two people shove on a wall with 100 N. The wall doesn’t move. How much work is done?

• 100J

• 100N

• 0J

• 0N

Multiple Choice

what is the formula needed to solve for work?

• w=f/d

• w= fd

• w=f+d

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