Category 1
Speed can be measured in units of distance and time, such as _______ .
What is kilometers per hour?
The force gravity exerts on an object's mass is its _________.
What is weight?
An object's ______ is its tendency to continue moving or to remain at rest.
What is inertia?
The force that acts to resist motion between two surfaces is ________.
Gravity is a force that pulls an object towards the ____________ of the Earth.
What is center?
To find your _______, divide the distance you travel by the time it takes.
What is speed?
The force that pulls objects together is called _______.
What is gravity?
When a frog jumps from a lily pad there are a pair of forces, the ________ force and the ________ force.
The friction caused by gas molecules hitting an object is _________ .
What is air resistance?
Two things that affect gravity are ________ and _______.
What is mass and distance?
Speed in a certain direction is ________.
What is velocity?
The amount of matter that makes up an object is its ___________.
What is mass?
When a frog jumps off a lily pad, the _______ force allows it to move up and off the lily pad.
What is the action force?
Engineers ________ objects to reduce friction with gas molecules in the air.
What is streamline?
If a skydiver jumps out of an airplane with a parachute and at different heights in the sky, they would still fall towards the center of the Earth or surface of the Earth each time. What does this tell you about the direction of gravity and the distance someone, or something, is falling?
What is when the skydiver jumps from a distance that is farther away from the surface of the Earth, the direction of gravity never changes?
The rate at which velocity is changing is ________.
What is acceleration?
An equal force moves an object with less mass ________ than it moves an object with more mass.
What is more?
When a frog jumps off a lily pad, the _______ force causes the lily pad to move in the opposite direction away from the frog.
What is a reaction force?
To cause a ping pong ball that is rolling down a chopsticks ramp to roll slower, you have to add _______ _________.
What is more friction?
If you were flying an airplane and dropped a tennis ball, feather, paper clip, and magnet out of it at the same height in the sky, which direction would you expect all objects to fall in and what does this tell you about gravity?
What is down/towards the center of the Earth and Gravity pulls ALL objects down toward the surface of Earth no matter what their weight is?
To cause a change in velocity you must ________.
What is change your direction?
Objects that are ________ have a greater attraction for each other than objects that are __________.
What is closer and farther?
In order to cause a change to an object's inertia, a __________ needs to act on it.
What is a force?
To cause an increase in _____ ____________ on an object, a parachute can be added to the object to help it fall slower.
What is air resistance?
If a roller coaster at Six Flags has a first hill of 78 feet and a top speed of 50 miles per hour. A second roller coaster has a first hill of 192 feet and a top speed of 66 miles per hour. And a third roller coaster with a first hill of 300 feet and a top speed of 93 miles per hour. The pattern must be that the ________ the first hill is, the ___________ the speed of the roller coaster.
What is taller and faster?