MySci Unit 20 Section 3-4 Post Test Review

What 2 variables affect the amount of work done on an object?

• Force and Speed

• Speed and Mass

• Distance and Time

• Force and Distance

A student is trying to move a large tree that is stuck in the ground. Which method would use the least amount of effort?

• Using a pulley to pull the tree out of the ground.

• Using a lever to pull the tree out of the ground.

• Using your hands to pull the tree out of the ground.

• Using a wedge to pull the tree out of the ground.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

How would a lever make the work easier for the student who is trying to get the tree out of the ground?

• Less force would be needed when using the lever to pull the tree out of the ground.

• More force was needed when using a lever to pull the tree out of the ground.

A science class wanted to know if an empty wagon and a wagon full of marbles would roll down a ramp at the same speed. How would they create a fair test?

• You would need one steep ramp and one slightly steep ramp to perform a fair test.

• You would need 1 large wagon and 1 small wagon and 2 ramps that are the same height and width to perform the fair test.

• The ramps would need to be the same height and width to perform a fair test.

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS2-2

Cayden and Josiah are building a garden near the playground at Wyland. There are 10 heavy rocks at the location where they want to build the garden. Before they begin building the garden, they have to move the rocks. What simple machines should they use to solve their problem? (There is more than 1 answer)

• Lever

• Wheel and Axle

• Screw

• Ramp

• Wedge

Tags

NGSS.MS-PS2-1

How could a lever help Josiah and Cayden remove the rocks from the area where they want to build a garden?

• A lever makes objects move.

• A lever makes it easier to lift objects.

• A lever can be used to place 2 pieces of wood together.

Tags

NGSS.MS-ETS1-2

How could a wheel and axle help Josiah and Cayden remove the rocks from the area where they want to build a garden?

• A wheel and axle make it easier to lift things.

• A wheel and axle can be used to place 2 pieces of wood together.

• A wheel and axle make objects move.

• A wheel and axle make it easier to move from a lower level to a higher level.

Tags

NGSS.4-PS3-4

How could a ramp help Josiah and Cayden remove the rocks from the area where they want to build a garden?

• A ramp makes it easier to move objects from a lower level to a higher level.

• A ramp makes it easier to lift objects.

• A ramp can be used to place 2 pieces of wood together.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Skylar sees a switch as she walks into the classroom. She pushes down on the switch and at the other end of the switch is a pinata filled with candy. The pinata moves up into the air. What simple machine did she use to lift the pinata into the air?

• Pulley

• Screw

• Ramp

• Lever

If Skylar pulls the switch back up, what will happen to the pinata?

• The pinata will go higher in the air.

• The pinata will fly across the room.

• The pinata will move down again.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2