Changes in Motion/study Flashcards
What is MOTION?
The change in position of an object.
What does GRAVITY do?
Gravity pulls objects toward Earth.
What are FORCES?
Forces are pushes and pulls.
Define SPEED.
Speed is an object in motion when its position is changing.
How is the SPEED of an object defined?
The speed of an object is defined by how far it travels in a standard amount of time.
When does an object NOT MOVE in response to force?
When an object DOES NOT MOVE in response to force, it is because the environment is applying another force.
What THREE ideas describe how an object changes position?
The three ideas that describe how an object changes position is SPEED, DIRECTION, and TYPE OF MOTION.
List three TYPES OF MOTION.
Types of motion include: roll, hop, jump, skip, bounce, fly, run, walk, slide.
List DIRECTIONS OF MOTION.
Directions of motion include: right, left, north, south, east, west, p, down, forward, backward.
How fast something moves is called__________.
Speed
Pushing down on the car’s gas pedal adds_______.
Force
What is INERTIA?
Inertia stops objects from moving UNLESS a force gets them going. Inertia also keeps objects moving in one direction.
Define FRICTION.
Friction is a force that makes things slow down or stop moving.
Anything that rubs can cause _______________.
FRICTION
How does sound move?
Sound moves in WAVES.
Brakes on a car use ____________ to stop.
Friction
Different surfaces cause different ____________ of friction.
amounts
Cement produces (MORE / LESS ) friction than ice.
More
cement is rougher than ice
What moves faster than ANYTHING else in the universe?
light
What force keeps items from floating off the surface of the Earth?
Gravity
What is the term for “speeding up?”
acceleration
