Simple Machines
Simple machines _____ mechanical advantage
Simple machines increase mechanical advantage
The spinning motion of the Earth’s axis.
Rotation
A large planet mostly composed of helium and/or hydrogen that does not have hard surfaces.
Gas giant
Substances that allow electricity to pass through them.
Conductors
Energy of motion
kinetic energy
A race car is an example of what type of machine?
Compound machine
What keeps the Earth revolving around the sun?
gravity
The force of gravity depends on two factors:
Mass and Distance
The electrons in a battery is an example of what type of energy
Electrical energy
Natural satellites that orbit a planet.
Moon
How can you identify the type of lever?
By observing what is in the middle of the lever.
Example First-class- fulcrum in the middle
The inner planets are also called_____ because they are dense and rocky
terrestrial planets
When the meteor hits the ground, they are called a
Meteorite
The most common ways to convert stored chemical energy into kinetic energy.
Combustion
Hunks of metal or rocks smaller than asteroids that orbit the sun.
Meteoroid
How can you use pulleys to lessen the load and spread the work on an object?
Adding more pulleys lifts the load spreads the work and makes it need less force
Name the inner planets
Mercury, Venus, Earth, and Mars.
Name the outer planets
Jupiter, Saturn, Uranus, and Neptune.
Where does chemical energy come from?
The energy that is stored in the bonds that hold atoms together.
A chemical process in which a substance reacts with oxygen to give off heat is called____.
Combustion
What is the use of a wedge?
The narrow end is driven into an object to push the object apart.
What effects the length of the Earth's day and night cycle?
the Earth's tilt
What planet's gravity keeps the asteroids in the asteroid belt instead of colliding with the inner planets.
Jupiter
When the electrons move through a circuit.
The energy of either an object in motion or the energy that is stored in objects by their position.
Mechanical energy