Types of Force
The force that causes a balloon to stick to your hair.
What is static electricity?
The reason you weigh more on Earth than on the Moon is because...
Gravity is stronger on the Earth than on the Moon.
Electrons float around all atoms, which make up all things in existence. (T or F)
T
A compass points North because the needles is affected by the Earth's __________.
Magnetic Field
We use a push force and send satellites into space, then letting gravity keep the satellite floating around the Earth.
This is useful because
1. we can take cool picture of Earth
2. we can take better pictures of space because the ________ is not in the way, like it is on the ground.
Atmosphere
The force that keeps us from floating into space.
What is gravity?
Two large magnets are lined up so that their poles are the same. If I am able to push them together that means the ________ force is stronger than the _______ force.
The push force is stronger than the magnetic force.
In magnetic materials, electrons are naturally "lined up", creating a magnetic field. T or F
True
The compass needle that points North is attracted to a special "pole" on the Earth, called Magnetic ________.
Magnetic North (which is close to the north pole. but not exactly there)
Why don't things slow down in space?
In space their is less atoms, so with almost no friction (even drag from air) there is not a strong enough force to slow objects down. That's why satellites never stop, even though they don't have an engine.
Static electricity, magnetic force, and gravity are all examples of _________ forces.
What are examples of noncontact forces?
Can a large magnet pull something on the other side of a wall?
Yes, if the magnetic field is strong enough then it will. (Remember objects pulled in the tupperware).
Wood is not magnetic, which means it does not have electrons. T or F
F, it has electrons, but they do not "line up" with a magnetic field in order to be attracted/repelled.
Google maps uses pictures taken by...
Satellites
Space rocks (meteors) fly towards the Earth. Instead of hitting us in the head, they melt. This is because of the friction between the rock and the Earth's _____________.
Atmosphere (air surrounding the planet), which is held by the Earth's gravity.
A push and a pull are both examples of _________ forces.
What are examples of contact forces?
Every day the sun's radiation is blocked by the Earth's _______________. Without this, we could not survive on our planet.
The Earth's magnetic field. (blocks solar wind, charged particles).
Since everything is made of atoms and all atoms have electrons, all things are affected by magnets. T or F.
True, some things are just more affected than others based on their number of electrons and where they are located.
Satellites do not float away because they are pulled to the Earth by the Earth's __________. They do not get pulled all the way to the ground because they are travelling fast enough that they fall around the earth.
As a satellite moves, it's constantly falling towards the Earth due to gravity. However, it's also moving horizontally at a speed that allows it to "miss" the Earth's surface. This balance between the downward pull of gravity and the horizontal speed of the satellite creates a stable orbit.
If the sun decided to change direction and head the opposite way, what would happen?
Earth would follow the sun, since it has stronger gravity than the Earth.
___________ might cause styrofoam to stick to your cat and then ___________ will cause it to fall to the ground.
What forces might cause styrofoam to stick to your cat and then fall to the ground?
The reason a balloon will not stick to your head forever is because...
The electrons will leave the balloon and the negative charge will be removed, causing the force of gravity to overpower the electrostatic force.
If you rub a balloon on your hair, it cause the balloon to gain electrons and become positively charged. T or F
F electrons, negatively (hair and wool are materials that easily lose electrons)
What is it called when something "falls" around the Earth constantly, but it is moving fast enough not to crash into the planet?
It is called being in "orbit".
Mr. E is cool
Yes.