Gravity
Define gravity.
The force that pulls/attracts objects down to Earth.
All magnets have a _____ and a ______.
What are north and south poles?
Show me friction.
(rubbing hands together)
The force that pulls objects to Earth
What is gravity?
In order for electricity to flow, a circuit must be ______.
Closed
Is gravity a PUSH or a PULL?
Pull
The North Pole and the South Pole of a magnet will _________.
What is Attract?
How does friction affect an object's motion?
Causes it to slow, stop, or change direction.
The force that opposes motion
What is friction?
All matter in the universe is made up of _______.
What are atoms?
Will gravity have a stronger force on an elephant or a dog? Why?
Elephant - it has more mass
What combinations of magnet poles will REPEL? (2 answers)
North to North and South to South
List 3 examples of friction that you saw TODAY
EX. Walking, driving, stopping, brushing teeth/hair, erasing work, etc.
This force causes a pull on certain metals.
What is magnetism?
An educated guess
What is a hypothesis?
The further from Earth you get, the ______ the force of gravity becomes. (stronger or weaker?)
Weaker
In order for a magnet to hover in air, the force of gravity and the force of magnetism must be ______.
Balanced
Which surface will provide the most friction to a moving object? Carpet, tile, or ice?
Carpet
Examples of this are a ball rolling to stop, a car braking, and going down a slide.
What are some examples of friction?
How could I make sugar dissolve into my drink faster?
Stir it, heat it, increase surface area (aka grind up the sugar)
Why does the Earth have a force of gravity stronger than the moon?
The Earth has much more mass than the moon.
What are the three magnetic metals?
Iron, nickel, and cobalt
What direction is the force of friction?
(opposite of the moving object, same as the moving object, up, down, etc?)
Opposite of the direction of the moving object.
These forces act on a ball rolling down a hill.
Friction and gravity
What are the 5 indicators of chemical change?
Color change, smell, bubbles, temperature change, light