In order for the genetic drift to occur, what is the necessary parameter?

• The population must be large.

• The population must be small.

• The population must be under environmental stress.

• The population must be sterile.

Pulleys can be used to...

• Make a large force lift a smaller load

• Make a small force lift a larger load

• Make a small force lift a smaller load

• Make a large force lift a larger load

Tags

NGSS.MS-PS2-2

When 2 gears are connected, in which direction do they turn?

• Opposite to each other

• In the same direction as each other

What can gears change about the motion (movement) of an object? (tick 3)

• speed

• force

• colour

• direction

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

How many parts does a lever have?

• 1

• 2

• 3

• 4

The more wheels in a pulley means...

• it increases the force needed to lift a weight

• it reduces the force needed to lift a weight

• the force needed to lift a weight stays the same

• the force needed to lift a weight disappears

Tags

NGSS.MS-PS2-2

What do gears have to help them work?

• teeth

• eyes

• ears

• feet

Tags

NGSS.MS-PS3-1

The Ancient Egyptians used which mechanism to help them build the pyramids?

• Gears

• Levers

• Pulleys

• Scaffolding

What does a lever need for it to work?

• A rope

• A wheel

• Some teeth

• A pivot

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which mechanisms use wheels to work?

• Gears

• Pulleys

• Levers

Tags

NGSS.MS-PS2-1