3rd Quarter Mastery Test in Science 6

You can move heavy boxes by sliding them over the ground, or you can put them on a dolly and then roll them over the ground. Which way makes it easier to move the boxes? Why?

• Sliding the boxes on the floor is easier than using the dolly because rolling friction is less than sliding friction

• Sliding the boxes on the floor is easier than using the dolly because sliding friction is less than rolling friction.

• Rolling the boxes over the floor on the dolly is easier because sliding friction is less than rolling friction.

• Rolling the boxes over the floor on the dolly is easier because rolling friction is less than sliding friction.

Which type of friction is shown in the picture?

• Rolling Friction

• Fluid Friction

• Static Friction

• Sliding Friction

The friction force acts in the ___________ direction of movement.

• same

• opposite

• straight

• adjacent

What type of friction is not moving?

• static
• sliding
• fluid
• rolling

Which of these pictures has useful frictional force?

• 
• 
• 

What is the force that causes objects to fall to Earth?

• Air resistance
• Gravity
• Water resistance
• Pressure

Axe is used for

• to chop firewood

• to lift load

• to open the lid of a bottle

• none

This simple machines is...

• a lever

• a pulley

• an inclined plane

• a wedge

There are ___________ simple machines.

• 4

• 5

• 1

• 6

The machines can be simple and complex.

• TRUE

• FALSE