Gravity of Earth

Gravity!!

Let's review what we know and learn some new vocabulary!

Vocabulary

Vocabulary

Here are some vocab terms you have or will see on the Gizmo activity- Gravity Pitch

Gravity

The force of attraction between all objects in the universe

Gravity

Gravity is only significant when one of the objects is very large, like the Earth. There is very, very little gravitational attraction between you and your couch – but there is some! 

BrainPOP Video

https://www.brainpop.com/science/natureoftheuniverse/gravity/

Poll

What makes an object have stronger gravitational pull?

• it's size: if the object is large

• it's distance from another object

• it's mass: if it's heavier

Gravity increases as mass & size increases

Poll

As the mass of the objects DECREASES, gravity will...

• increase

• decrease

• stay the same

Multiple Choice

If the distance between object DECREASES and gets closer together, the force of gravity...

• increase

• decrease

• stay the same

Orbit

The path of a celestial body (such as a moon or a planet) around another body.

Orbital velocity

The speed an object must travel to achieve a perfectly circular orbit

Escape velocity

The speed an object must travel to escape the gravitational pull of a planet.

If an object is launched at escape velocity, it will leave the planet and not return.

Crash Course Kids Video

https://youtu.be/gWy2-o9uwrc

Trajectory

The path of an object through space. 

Velocity

An object’s speed and direction of motion