Forces+and+Motion+Key+Words


 * Key Words from Forces and Motion Unit:**

__**Vacuum**__ Vacuum is a space with no air; like outer-space

__**Terminal Velocity**__ The constant speed of an object falling, or, the constant maximum velocity reached by a body falling through the atmosphere under the attraction of gravity.

__**Air Resistance**__ Air Resistance is when you want to go through a mountain you have push it all the way,

__**Acceleration**__ Means when something is going from slow to a fast speed. Acceleration is the opposite of Deceleration.

__**Gravity**__ A force that is constantly pulling on all items and making them fall to the ground, or in space there is a spacetime fabric that holds planets and stars, and they roll on the sheet, towards the heavier body.

Balance means that when you control something from your body, to not fall keep it balanced. Like a bird if it wants to it have to balance with it's wings, and tails.
 * __Balance__**

Inertia means an object change in its state of motion and motion that you are doing. Like if you are sitting the gravity wants you to keep sitting.
 * __Inertia__**

The action of one surface or object rubbing against another. Like when you rub two sticks together and make fire. The reason the fire happens is bacause of the friction. The friction makes fire because the sticks are getting hotter and hotter, which eventually transforms into fire.
 * __Friction__**

To control variables is to make everything the same when your doing an experiment except what your compairing. So when you do an experiment such as making different sizes of balls bounce, you need to set up an thing that will releace it the ball in the same power.
 * __Variables__**

__**F= M x A**__ This is one of Newtons Law of motion. The __**F**__ means force, the **__M__** means mass and the **__A__** means accelaration.

The weight is how much gravity is pulling you down. Mass is how much thing's mass is in your body. For example your weight changes at space. That means there are different powers of gravity pulling you. BUT, your mass never changes, even if you were in a star that has so weak gravity or so strong gravity.
 * __Weight VS Mass__**

Hypothesis is a paragraph or a sentence wrting with your own guess or estimate. Like, this ball will fall slower or I think this ball will fall faster.
 * __Hypothesis__**

An orbit is a ring in which the planets use to go around the sun. In physics, an **orbit** is the gravitationally curved path of an object around a point in space. The shape of an orbit is elliptical.
 * __Orbit__**

__**Biomimickry**__

The orbits' ring's shape are called ellipse. The rings are alikely same as the shape as the oval so that shape is called ellipse.
 * __Ellipse__**