Newton's 3rd Law
(8-PS2-1)
Motion & Net Forces (8-PS2-2)
Non-Contact Fields (8-PS2-3)
Gravitational Interactions
(8-PS2-4)
Fields & Energy
(8-PS2-5)
100

It is the equal and opposite force that reacts to an action force.



    • What is a reaction force?





100

This type of force causes an object's velocity to change, meaning it accelerates, decelerates, or changes direction.

What is an unbalanced force?

100

These are the two opposite ends of a magnet where the magnetic force is strongest.

What are poles (North and South)?

100

This is the only type of force that gravity can exert on matter.



    • What is an attractive force? (or a pull)


100

This invisible area around a charged object exerts a force on other charged objects without making physical contact.

What is an electric field?

200

When a rolling billiard ball collides with a stationary one, this happens to the total momentum of the system.

What is it remains the same? (Conservation of Momentum)

200

If an object has a net force of zero acting upon it, its motion will do this.

What is stay the same? (It remains at rest or keeps moving at a constant speed).

200

Unlike gravity, electric and magnetic forces have the unique ability to do this to objects, rather than just pulling them in.



    • What is repel?



200

These two fundamental properties determine the strength of the gravitational pull between any two objects in the universe.

What are mass and distance?

200

When you pull two attracting magnets further apart, you are increasing this type of stored energy within the magnetic field.

What is potential energy?

300

According to this law, if you push a heavy wall with 50 Newtons of force, the wall pushes back on you with exactly this much force.

What is 50 Newtons?

300

This property of matter causes an object to resist any change in its motion, and it depends entirely on the object's mass.

What is inertia?

300

This type of temporary magnet is created by wrapping a current-carrying wire around an iron core.

What is an electromagnet?

300

If you double the distance between two planets, the gravitational force between them will do this.

What is decrease?

300

This object can be used to visually map out and prove the existence of an invisible magnetic field structure.


  • What are iron filings? (or a compass)
400

This device utilizes Newton's Third Law by expelling gas downward to propel itself upward into space.

What is a rocket?

400

If you apply the same force to a baseball and a bowling ball, the baseball will accelerate faster because it has less of this.

What is mass?

400

To increase the strength of an electromagnet without changing the power source, you can do this to the wire.



    • What is wrap more coils around the core?


400

While your mass stays exactly the same on the Moon, this measurement changes because the Moon has less gravity than Earth.

What is weight?

400

As two objects with the same electrical charge move closer together, the potential energy in the system does this.

  • What is increases? (Because they repel each other, pushing them together stores energy like compressing a spring).
500

To design a solution that minimizes the force of a collision between two remote-controlled cars, you should increase this variable during the impact.



    • What is time? (or changing the materials to absorb energy)





500

To plan an investigation supporting this standard, you must control these two main variables to observe changes in an object's motion.



    • What are the mass of the object and the sum of the forces acting on it?





500

This happens to the magnetic field lines as you move further away from a permanent magnet.


What is they spread out / get weaker?


500

This is why Earth's gravity is strong enough to keep the Moon in orbit, yet the much larger Sun doesn't pull the Moon away from us completely.

  • What is because Earth is much closer to the Moon than the Sun is?
500

This type of non-contact field exists around any object that possesses mass, regardless of its size.

  • What is a gravitational field?