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Forces 01
Mass and gravity cause a backpack full of books to feel heavy when you lift it.

Forces 01

In KS2 children will spend a good deal of time looking at forces such as air resistance, gravity, upthrust and friction. This is the first of three Science quizzes looking at the different types, and the effects, of forces.

A force is the push and pull that causes objects to undergo change. Everything in existence is affected by forces all of the time - whether it's the pull of gravity, the drag of air resistance and friction, or the push of upthrust. It's amazing that we cannot see forces, despite them being everywhere. So how do we know they exist? Well, we can see the effects they have, like the Earth orbiting the Sun because of the force of gravity, or a needle in a compass moving due to the force of magnetism

Do you know how water resistance and upthrust affect a boat on water? Or how gravity and friction slow a moving car? Check your scientific understanding by trying this first Forces quiz.

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Which unit should be used to measure mass (the amount of matter an object contains)?
Degrees Celsius
Although weight is often given in kilograms and grams, this measurement really refers to mass. Weight is dependent on gravity and can change if the force of gravity is different (you wouldn't weigh the same on the Moon as you do on Earth, because the Moon has less gravity)
In a diagram, a force is represented by what?
An X
A circle
A tick
An arrow
When labelling a diagram, you use arrows to show the direction of a force
Which of the following is not a force?
Electricity is a type of energy
If you roll a ball across the carpet, which forces will cause it to slow down and then stop?
The push from your hand and gravity
Magnetic pull and upthrust
Gravity, friction and air resistance
Upthrust and air resistance
Gravity pulls the ball against the carpet. The ball rubs against the carpet, which is friction, and the air around the ball also rubs against it
Which of the following would you use when measuring force?
A ruler
A hygrometer
A forcemeter
A thermometer
Another name for a forcemeter is a Newtonmeter
What is a force?
A source of energy
A push or a pull
A magnet
A measurement
A force is always exerted either as a push or a pull
In which direction does gravity exert force (as experienced by people or objects on Earth)?
Both up and down
Gravity can exert force in any direction
Gravity pulls all objects (on the Earth's surface or in its atmosphere) down towards the centre of the Earth - the Earth's gravity even keeps the Moon in orbit because it pulls the Moon towards its centre (otherwise the Moon would travel in a straight line out into space)
What are forces measured in?
Degrees Celsius
The newton is named after the famous scientist Isaac Newton who you may have heard of
What causes a backpack full of books to feel heavy when you lift it?
Air resistance
Upthrust and friction
Mass and gravity
The force of gravity acting on mass (the amount of matter in an object) is called weight - which is, of course, what makes an object feel heavy
Forces can cause objects to change what?
Their speed
Their direction
Their shape
All of the above
Forces can speed things up and slow them down, push or pull them in a new direction, or squash and stretch them!


Author:  Sheri Smith

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