Atoms
what are the 3 subatomic particles?
Protons, neutrons, electrons
Is static electricity a contact or non-contact force? Why?
Noncontact because the force occurs without objects touching
What is the south pole attracted to?
The north pole
Is gravity attractive or repulsive?
Gravity is an attractive force
No we can show them with drawn field lines
What are the charges for each?
Proton
Electron
Neutron
Proton= positive
Electron= negative
Neutron= no charge/neutral
What charges do objects have in order to feel attraction?
Opposite (positive and negative)
What are the 3 common magnetic materials?
Iron, cobalt, nickel
Which object feels earth's gravity more an ant or an elephant? Why?
An elephant because it has more mass
What is the subatomic particle that transfers to cause a static charge?
electron
What particles are located in the nucleus?
Protons and Neutrons
What charges do objects have in order to feel repulsion?
Same charges (+ +, - - )
How can you describe the movement of the electrons/atoms in a magnetic material?
They are aligned and move in the same direction
what 2 characteristics define gravity?
Distance and mass
How can you increase the strength of a non-contact force?
Decrease the distance or increase the charge
1. It changes the identity of the element
2. They are trapped their from beginning of time
What are 2 examples of a static electrical discharge?
Your hand getting zapped on a doorknob
Lightning strike
What happens when you break a magnet?
The movement of atoms/electrons changes and the broken piece will create its own new north and south pole
Which object feels earth's gravity more?
a 15 kilometer planet 10,000 lightyears away from earth
or a 15 kilometer planet 16,000 lightyears away from earth
a 15 kilometer planet 10,000 lightyears away
Why is earth's magnetic field important?
It protects us from solar flares and from stripping away our ozone without it the earth would be barren and hot
How does an atom get a negative charge?
Positive charge= Lose electrons
Negative charge= Gain electrons
Tell me 1 insulator and 1 conductor example and tell me how they would interact in order to get a charge/feel static. What will their charges be in the end?
A balloon is an insulator and will steal electrons from a conductor like your head when you rub them together. The balloon is now negative and the head positive.
How is the earth like a giant magnet?
The core of the earth is made of magnetic iron and as it spins internally it creates a giant magnetic field with a north and south pole
Why do the planets orbit and not fall out of the sky?
The sun is so massive that it's gravity attracts all other mass and the planets are stuck in its gravity orbiting around.
How do non-contact forces move an object if it does not touch them?
Through force fields of attraction or repulsion