Forces
Any push or pull on an object is called a...
Force
This invisible force pulls everything to the ground, caused by the gravitational pull coming from Earth's ______.
Centre
This is the "shock" you might feel when you touch a light switch after rubbing your feet on a carpet.
Every magnet has two of these - one is called North, and one is called South.
Poles
This force can either pull objects together (attract) or push them apart (repel).
Magnetism
Friction, Tension, Elastic/Spring, and Applied force are also known as _______ forces.
Contact
Gravity is responsible for keeping these large objects in space moving in a circle around the sun.
The planets
When you rub a balloon on your hair, the balloon collects ________ ______.
Electric charge
If you put a North and a South pole together, they will _______ each other.
Attract
True or false: to see how invisible magnetic forces work, we can bring a magnet close to another magnet or metal object and observe how they attract or repel.
True
A push or pull that can make an object move without touching it.
Non-Contact Force
This big object in the sky uses gravity to pull on our oceans and make the tides go in and out.
The Moon
This giant spark in the sky during a storm is actually a huge "zap" of static electricity.
Lightning
Name one of the three special metals that magnets are usually made of.
Iron, nickel, or cobalt.
Non-contact forces can pass through wood, rubber, paper, and other materials. As two objects get further away from each other, does the non-contact force between them become stronger or weaker?
Weaker
This "empty" place has no air resistance slowing objects down, allowing a feather and a rock to fall at the same speed.
A vacuum
To make static electricity, you usually need to ___ ________ two objects, like a comb and your hair.
Rub together
This tool uses a small magnet to help people find their way around the world.
A compass
This is a special magnet that you can turn "on" or "off" using a battery.
A force can do these four things to an object: make it move, make it stop, change its direction, or change its _____.
Shape
As an object falls toward Earth, what happens to its speed?
It increases (goes up to make the object fall faster)
Earth acts like a giant ______, which is why it has its own magnetic field.
Magnet
When a magnet attracts a paperclip, the magnet is attracted to what metal in the paperclip?
Steel
Farmers give cows magnets to stop this "disease" caused by cows eating sharp metal.
Hardware disease