A place or object used for comparison to determine if an object is in motion.
What is reference point.
100
A system of measurement based on multiples of ten and on established measures of mass, length, and time.
What is International System of Units.
100
One of the major pieces that make up Earth's upper layer.
What is plate.
100
Acceleration is
What is the rate at which velocity changes.
100
Units in the International System of Units include:
What are meters, grams, liters, Celsius, etc.
200
100 miles per hour describes ____________
What is speed.
200
The abbreviation for the International System of Units.
What is SI.
200
We live on this plate.
What is North American Plate.
200
Another term for decreasing speed or deceleration.
What is negative acceleration.
200
A tree next to a moving train in an example of:
What is reference point.
300
The state in which one object's distance from another is changing.
What is motion.
300
Distance divided by time.
What is speed.
300
The theory that pieces of Earth's outer layer are in constant motion.
What is theory of plate tectonics.
300
A train does this when it leaves the station.
What is accelerates or increases speed.
300
100 centimeters = ?
What is one meter.
400
The overall rate of speed at which an object moves.
What is average speed.
400
A line that visually shows a train's distance at various time.
What is slope.
400
According to the theory of plate tectonics, Earth's landmasses have changed position over time because they are part of plates that are _______________ moving.
What is slowly.
400
An object can do this without changing speed.
What is changing direction.
400
The speed of a train when it passes one spot is an example of:
What is instantaneous speed.
500
Speed in a given direction.
What is velocity.
500
Final speed minus initial speed divided by time.
What is acceleration.
500
Some plates move at a rate of several ______________________ each year. Others move only a few _______________________ per year.
What is centimeters and millimeters.
500
In science, acceleration refers to increasing speed, decreasing speed, or ______________________ .
What is changing direction.
500
The speed of a train going eastward is an example of: