Metric System, Forces, and Energy

rate at which velocity changes

• instantaneous speed
• direction
• acceleration
• motion

If one of Earth's plates moves 5 centimeters every year, how far will it move in 500 years?

• 25 kilometers
• 25 centimeters
• 25 meters
• 250 meters

the steepness of a line on a graph 

• rise
• run
• slope
• vertical axis

speed equals distance divided by 

• time
• velocity
• size
• motion

Earth's plates move a few millimeters to several centimeters each

• day
• week
• month
• year

Changing direction is an example of a kind of 

• acceleration
• speed
• velocity
• constant rate

Which of the following is an example of deceleration?

• a bird taking off for flight
• a roller coaster moving down a steep hill
• a car approaching a red light
• an airplane following a straight flight path

The International System of Units (SI) is used 

• only in the U.S.
• only in France
• in most of Europe
• all over the world

If the speed of an object does not change, the object is traveling at a 

• constant speed
• average speed
• increasing speed
• decreasing speed

When an object's distance from another object is changing,

• it is in motion.
• it is speeding.
• it has a high velocity.
• it is accelerating.