Big Idea 5

When you drop an object, what causes it to fall to the ground?

• Air resistance

• Gravity

• The push from you

• Magnetism

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A ball is sitting loose on a flat wagon that is going in the direction of the arrow. If the wagon suddenly stops, the ball will

• also suddenly stop

• roll forward in the wagon towards the handle

• roll backward in the wagon away from the handle

• bounce up and down

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which statement best describes what must happen in order for a person to lift an object?

• The force of gravity must be greater than the mass of the object.

• The mass of the object must be greater than the force of gravity.

• The force of gravity must be greater than the upward pull or push on the object.

• The upward push or pull on the object must be greater than the force of gravity.

Tags

NGSS.MS-PS2-4

You are pushing a box. The force is shown with an arrow. The box does not move. What keeps the box from moving even though you are pushing on it?

• You are pushing the box in the wrong direction.

• There is too much air resistance to move the box.

• The force of friction is opposing the force you exert.

• The force of gravity is opposing the force you exert.

Tags

NGSS.HS-PS2-1

A large rock is at the top of a long, sloping hill. Although it is too big to pick up, a small push is enough to cause it to move down the hill. How can a small push cause such a large rock to move?

• The direction of the force is important, not the amount of force.

• Pushing the rock increases the friction, which causes the rock to move.

• Even a small push will balance the forces and allow the rock to move.

• The additional small push was enough to unbalance the forces acting on the rock and allow the rock to move.

Tags

NGSS.MS-PS2-2

Ben put different masses on each of the carts. He then launched each cart from the same starting point using the same amount of force. Ben measured how far each cart rolled from the starting point.How will the force of the launch affect the carts?

• Cart 3 will travel the longest distance.

• Cart 1 will travel the shortest distance.

• Cart 3 will have the least change in its motion.

• Cart 1 will have the greatest change in its motion.

Tags

NGSS.MS-PS2-2

The four balls below are about to be struck by a stick. If the balls are hit with the same force in the same direction, which ball will go farthest?

• ball 1

• ball 2

• ball 3

• ball 4

Tags

NGSS.MS-PS2-2

An object is moving at a constant speed. If a balanced force is applied in the opposite direction the object is moving, what will most likely happen?

• The object will speed up.

• The object will change direction.

• The object will continue moving at a constant speed.

• The object will slow down and eventually stop moving.

Tags

NGSS.MS-PS2-2

Katie is sitting on the ground playing with some toy trucks (see picture below). She takes the first toy truck and, using all her force, pushes it away from her. She then takes the second toy truck, which is much lighter than the first, and pushes it away from her. How does the movement of the trucks contrast?

• The smaller truck accelerates faster and moves a greater distance because more force is acting on it.

• The smaller truck accelerates faster and moves a greater distance because it has less mass.

• The larger truck accelerates faster and moves a greater distance because it has more mass.

• The larger truck accelerates faster and moves a greater distance because less force is acting on it.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

How are igneous rocks formed?

• heat and pressure

• molten lava cools

• small pieces of sediments and fossils

• moving rocks from one location to another