Forces and Motion
This invisible force pulls objects toward the Earth and is also responsible for keeping planets in orbit around the Sun.
What is gravity?
This object is a massive ball of gas that produces its own light and sits at the center of our solar system.
What is the Sun?
This type of wave allows us to see objects because it travels from those objects to our eyes.
What is visible light?
This simple machine uses a rigid bar that pivots on a point to help lift heavy objects.
What is a lever?
This scientist used a telescope to make careful observations of the moon, planets, and stars, helping change how people understood space.
Who is Galileo Galilei?
According to Newton’s First Law, when all forces on an object are balanced, the object will continue in its current state of motion without changing speed or direction. This idea is called:
What is inertia?
The measure of distance in space.
What is a light-year?
These types of waves travel in a snake-like side-to-side pattern.
What are transverse waves?
This machine uses a rope and wheel system to change the direction of force when lifting objects.
What is a pulley?
This scientist developed the three laws that describe how objects move and how forces act on them.
Who is Isaac Newton?
When you push on a wall and the wall pushes back on you with equal force, this law of motion is being demonstrated.
What is Newton’s Third Law?
This is a vast system made up of billions of stars, gas, and dust, all held together by gravity.
What is a galaxy?
Unlike sound waves, this type of wave does not need a medium and can travel through empty space.
What is a light wave (or electromagnetic wave)?
This simple machine is a flat, slanted surface used to move objects to a higher place.
What is an inclined plane?
This ancient Greek thinker studied how objects float and sink and made discoveries about forces in fluids.
Who is Archimedes?
This force can act at a distance, can both attract and repel, and is closely connected to electricity.
What is magnetism?
This planet rains sulfuric acid.
What is Venus?
When light bounces off a surface instead of passing through it, this behavior is called:
What is reflection?
The head of an axe would be an example of this simple machine.
What is a wedge?
This is defined as the ability to do work.
What is energy?
When a force causes an object to speed up, slow down, or change direction, we describe this change in motion with this term:
What is acceleration?
This planet spins on its side.
What is Uranus?
These are the most dangerous kind of electromagnetic waves.
What are gamma waves?
This point on a lever is the place where the bar pivots or turns.
What is a fulcrum?
This principle states that energy cannot be created or destroyed, only changed from one form to another.
What is conservation of energy?