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Science - Chapter 1: GRS Worksheets
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Gravity
Terms in this set (37)
motion
An object is in _____ when its distance from another object is changing.
a place or objects used for comparison to determine if something is in motion
A reference point is ______.
reference point
An object is in motion if it changes position relative to a _____.
International System of Units
What is the whole name for SI?
10
What number is SI based on?
meter
What is the basic SI unit of length?
100
How many centimeters are there in a meter?
1,000
How many meters are there in a kilometer?
Speed = Distance/Time
What is the formula that is used to calculate the speed of an object?
divide the total distance by the total time
How would you find the average speed of a cyclist throughout an entire race?
velocity
Speed in a given direction is called _____.
the direction it is moving
An approaching storm is moving at 15 km/h. What do you need to know to determine its velocity?
slope
The slant of a line on a graph is called its _____.
true
True or False? The steepness of the slant of the line on a motion graph depends upon how quickly or slowly the object is moving.
false
True or False? Earth's rocky outer shell is all one piece.
plates
The upper layer of Earth consists of more than a dozen major pieces called _____.
The theory of plate tectonics is earths plates move ever so slowly in various directions
What is the theory of plate tectonics?
A B D
Which statements Are true about earths plates?
A -- Some plates push toward each other
B -- Some plates slide past each other
C -- Earth consist of five major plates
D -- Some plates pull away from each other
true
True or False? The speed of Earth's plates is very slow.
Scientist can estimate where the continents will be years from now by knowing the average speed of a plate.
By knowing the average speed of a plate, what can scientists estimate about Earth's continents?
Distance = Speed x Time
What formula do scientists use to predict how far a plate will move in a certain amount of time?
false
True or False? This shapes in positions of earths continents will not change in the future.
equal
A conversion factor is a fraction in which the numerator and the denominator are _____.
Acceleration is the rate at which velocity changes.
What is acceleration?
speed and direction
Acceleration involves a change in what two components?
acceleration
Any time the speed of an object increases, the object experiences _____.
true
True or False? Acceleration refers to increasing speed, decreasing speed, or changing direction.
A B D
What letters describe an example of acceleration?
A -- A car follows a gentle curve in the road.
B -- A batter swings a bat to hit a ball.
C -- A truck parked on a hill doesn't move all day.
D -- A runner slows down after finishing a race.
The moon accelerates because it is continuously changing direction.
The moon revolves around earth at a fairly constant speed. Is the moon accelerating? Explain why or why not.
Speeding up
Every day language for increasing speed
Decreasing speed
Scientific language for slowing down
Changing direction
Scientific language for turning
You must calculate the change in velocity during each unit of time.
What must you calculate to determine the acceleration of an object?
Acceleration = Final velocity - initial velocity/Time
What is the formula that is used to determine acceleration?
false
True or False? To calculate the acceleration of an automobile, you must subtract the final speed from the initial speed.
A B D
What letters are true statements about calculating the acceleration of a moving object?
A -- If an object is moving without changing direction, then it's acceleration is the change in its speed during one unit of time.
B -- If an object speed changes by the same amount during each unit of time, then the acceleration of the object at any time is the same.
C -- To determine the acceleration of an object, you must calculate the change in velocity during only one unit of time.
D -- If an object's acceleration varies, then you can describe only average acceleration.
kilometers/hour/hour
If velocity is measured in kilometers/hour and time is measured in hours, the unit of acceleration will be _____.
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