Contact or non-contact force?
1. Magnet attracting an object
Non-contact force
6 Noncontact attractive force that exists between all objects that have mass
Gravity
11. Besides gravity there are other noncontact forces....
electricity and magnetism
14.what happens when two north pole magnets are brought together
the magnets repel
19. If 2 magnets repel each other what poles are facing each other?
North/north or south/south
2. truck pulling a car
contact force
7. What two things does the strength of gravity depend on?
Mass and distance
12 Mass is
the amount of matter in something
15. The entire region surrounding a magnet is known as the:
magnetic field
Where are magnetic fields the strongest on a bar magnet?
At the poles
3. pushes or pulls that results from two objects touching each other
contact force
8.Gravity is a force that works at a distance. What are 2 other non-contact forces?
electricity & magnestism
13. Weight is
the the gravitational pull on an object
16. if 2 magnets attract what poles are facing each other?
north south
True or False: Iron filings will be attracted to a magnet.
True
4. Gravity pulling us down to earth
Non-contact force
Which has more gravity AND why--Saturn or Mercury?
Saturn because it has more mass.
How would you change the electric charge of a balloon?
Rub a cloth on it to transfer electrons.
17. what is the affect of decreasing distance on electromagnet force?
The smaller the distance between two electromagnets, the greater the force.
20. what is required for a magnet to create an electromagnetic force
a flowing electric current
5.Force that pull our hair toward a balloon
Electrostatic force or static electricity
10 Describe the effect of mass and distance on gravitational forces.
Gravity increases when mass increases and decreases when mass decreases. Gravity increases when distance decreases and decreases when distance increases.
Which would hold electric charge--a plastic rod or a metal rod and why (use the word CONDUCTOR in your answer)?
Metal rod. Plastic is a poor conductor of electricity and Metal is a GOOD conductor.
How do you increase electromagnetism when using a copper wire coil?
The more coils wrapped around the metal, the more powerful the force.
Describe what causes the Aurora Bourealis.
Earth's magnetic field blocks solar flares and solar winds from entering Earth's atmosphere.