Gravitational Force
What is gravity or gravitational force?
1.A force of attraction between two objects.
What are magnets and do they attract, repel or both?
Magnets are objects that exert an invisible force called magnetic force. Magnets attract or repel other objects
What is an electric force and does attract, repel or both?
It is an invisible force produced by electrically charged particle(s). It is attractive or repulsive interaction between any two charged objects.
Charged Particles are what?
Particles with either a positive or negative electric charge
What factor makes Earth a magnet?
The Earth's inner and outer core is made of iron. The inner core is solid, while the outer core is liquid and moves. This creates a magnetic field around the Earth.
What factors affect the strength of gravity?
1. Mass
2. Distance
What materials are magnets made of?
Usually made of iron, nickel or cobalt
What is an electric charge?
Particles that are positive (protons) and negative (electrons) that are attracted or repelled in matter that causes a force.
Charged Object
Matter with a surplus or deficiency of electrons
Why does Earth have poles?
Earth is a giant magnet
What is the relationship between gravity and the size of an object?
1. Larger objects exert more gravity
2. Smaller object exert less gravity
Name the three factors that determine the strength of a magnet.
1. Its size
2. What it is made of
3. The magnetic objects distance from the magnet
When do we say that the electric force is neutral?
When the particles (positive and negative) are equal and without an electric charge.
Attractive
The tendency for one object to pull other objects towards it
Earth's magnetic field does what?
Creates a protective sphere around earth.
What happens to the force of Earth's gravity as distance from Earth increases?
Gravity decreases the further you get from Earth.
What are magnetic objects?
1. Things that are attracted to a magnet without exerting a magnetic force of their own.
What is an electric field?
The area of the electric force around a charge particle or object.
Repulsive or repel
The tendency for one object to push other objects away from it
Why does a compass work?
A compass has a magnetic needle that spins freely and a lines with the poles.
What is the difference between mass and weight?
Mass - amount of matter in an object
Weight - measure of gravity on the mass
Name three types of magnets and what they are.
1. Permanent Magnet - objects made of matter that is permanently magnetized.
2. Temporary Magnet - objects that become magnets through the process of magnetization
3. Electromagnet - temporary magnet procuded by an electric current
What is Current?
A directional flow of electrical charge through an object or medium
Magnitude
The size or quantity of something
Magnetic North is geographic
South