8th Grade Science Test Prep: Key Concepts and Strategies

How do you calculate the average speed of an object from a graph?

• Add all the speeds at different times

• Subtract the final distance from the initial distance

• Divide the total distance by the total time

• Multiply the distance by the time

Tags

NGSS.MS-PS3-1

What does the slope of a graph represent in terms of an object's movement?

• Time

• Speed

• Distance

• Acceleration

Tags

NGSS.MS-PS3-1

What characteristic of an object does the slope of a distance-time graph represent?

• Volume

• Density

• Speed

• Mass

How is density calculated?

• Mass divided by volume

• Volume divided by mass

• Mass plus volume

• Mass minus volume

What is the density of air in kilograms per cubic meter?

• 0.1

• 1000

• 1

• 2000

Tags

NGSS.MS-ESS2-5

Which lump of clay has the lowest density based on the given data?

• Lump Z

• Lump Y

• Cannot be determined

• Lump X

How long does it take for a bicycle to travel 100 meters at 2 meters per second?

• 50 seconds

• 100 seconds

• 200 seconds

• 25 seconds

What is a fault line?

• A riverbed in a desert

• A volcanic ridge

• A type of mountain

• A break in a rock layer causing sliding

If two students push a cart from opposite sides, how is the net force determined?

• By dividing one force by the other

• By subtracting the smaller force from the larger one

• By multiplying both forces

• By adding both forces

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which direction will a box move if forces are applied as described?

• Straight up

• Straight down

• To the right and up

• To the left and down

Tags

NGSS.MS-PS2-2