This word describes what acts on an object in order to make it move or accelerate.
What is a force?
100
An object's weight may change if it is taken from Earth to the Moon, but this does not change.
What is mass?
100
This describes sounds in terms of loudness or softness.
What is volume?
100
Force applied over distance is described by this word. A machine cannot decrease this no matter how efficient it is!
What is work?
200
An object which changes velocity over time has undergone this.
What is acceleration?
200
This force eventually stops a skidding car.
What is friction?
200
Often called Hertz or cycles per second, this word refers to the number of times a sound wave vibrates in one second.
What is frequency?
200
This machine reduces force by half using distribution of tension over two parts of the same rope or string.
What is a pulley?
300
Newton described an object's tendency to resist change as this.
What is inertia?
300
This force, often referred to as a "normal force" is responsible for keeping you in your seat.
What is gravity?
300
This word intuitively describes sounds as "high" or "low".
What is pitch?
300
This machine is used to dig holes and hit baseballs.
What is a lever?
400
This force is transferred from one mass to another mass during a collision.
What is momentum?
400
Two different quantities describe an object's rate and direction of motion. The first has no direction but the second does. These are ________ and ________.
What are speed and velocity?
400
A sound wave that hits a solid surface and reflects backward is said to cause this.
What is echo?
400
A wheelchair ramp is an example of this machine which distributes force over a longer distance.
What is an inclined plane?
500
In a collision, all forces remain in existence but may be transferred from one thing to another. In this example, energy is ________.
What is conserved?
500
At this point, a circling object's inertia is balanced with the force of gravity.
What is orbit?
500
True or false: A sound traveling through a solid will travel faster than sound traveling through air.
True.
500
This machine is illustrated at the center of a see-saw and also the pointed nose of a seal balancing a ball.