8th 1.1

Lightning could be compared to which of the following?

• running water
• a wave
• thunder
• a spark

If a force acts constantly on a stationary object, the object will:

• remain stationary
• accelerate in the direction of the force.
• move at a constant speed in the direction of the force.
• accelerate in the opposite direction of the force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

a ball rolling along a smooth sidewalk suddenly rolls onto a grassy area. What will happen to the ball's motion?

• It will roll faster because friction increases.
• It will roll faster because friction decreases.
• It will roll slower because friction increases.
• It will roll slower because friction decreases.

Tags

NGSS.MS-PS2-2

An electric spark ________

• results whenever electricity passes through a wire

• is caused by a magnetic attraction

• is an electrical charge suddenly release through the air

• comes from too much heat build up in a wire

Tags

NGSS.MS-PS2-3

The force that keeps satellite in orbit around the Earth is:

• magnetic
• friction
• electrical
• gravity

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

When the Apollo astronauts went to the moon, they weighed about one-sixth of what they weighed on Earth because _____________.

• they lost a lot of weight during their journey to the moon
• they were much farther from Earth
• the moon's mass is less than the Earth's mass
• the moon's mass is greater than the Earth's mass

Tags

NGSS.MS-PS2-4

A stone is attached to a spring balance. The stone pulls the spring of the balance downward because:

• it attracts the spring toward it
• the spring pushes the stone downward.
• Earth's gravity pulls the stone downward.
• the stone and the spring have opposite magnetic poles.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The force that one surface exerts on another when the two rub against each other is called _______________.

• gravity
• friction
• energy
• electricity

Tags

NGSS.3-PS2-1

When a skier rides a ski lift uphill ______________ is stored. As the skier travels downhill, stored energy converts to ___________.

• potential energy/kinetic energy
• kinetic energy/ friction
• thermal energy/ friction
• friction/potential energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

The gravitational attraction between two objects depends on the distance between objects and their ___________.

• masses
• momentum
• magnetic attraction
• volumes

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4