Final Exam Review

Which of the following statements is true about fields between objects exerting forces on each other?

• a. The objects have to be in contact for the fields to exist.

• b. The fields only exist between magnetic objects.

• c. The fields exist between objects exerting forces on each other, even though the objects are not in contact.

• d. The fields only exist between electrically charged objects.

Tags

NGSS.MS-PS2-5

What evidence would support the claim that the change in an object’s motion depends on the sum of the forces on the object and the mass of the object?

• Evidence that the change in motion depends only on the mass of the object.

• Evidence that the change in motion depends only on the sum of the forces on the object.

• Evidence that the change in motion depends on the sum of the forces on the object and the mass of the object.

• Evidence that the change in motion depends on the type of force acting on the object.

Tags

NGSS.MS-PS2-2

Based on Newton's 3rd Law, if you are exerting a downward force on the chair, then the chair is...

• destroying the forces

• exerting a stronger downward force

• causing the load to accelerate upwards

• exerting an upward force that is equal to the downward force

Tags

NGSS.MS-PS2-1

The diagrams show forces acting on a toy car as it moves to the right. Which diagram shows the toy car that will most likely accelerate to the right based on these conditions?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What does the image show? Select all correct answers.

• pure substances

• molecules

• mixtures

• one compound,

  one atomic element,

  and one molecular element.

Answer explanation

All three of these are pure substance! One picture shows atoms of an element only- this is the atomic element. One picture shows an element in molecule form. This is the molecular element. There is also the compound- a combo of two DIFFERENT elements bonded together chemically. There are no mixtures in this picture.

Tags

NGSS.MS-PS1-1

What is true about both B and C?

• they are both molecules.

• they are both compounds

• they are both elements

• they are both mixtures

Tags

NGSS.MS-PS1-1

Which distance/time graph would represent an object moving forward at a constant speed?

• A

• B

• C

• D

Jackson throws a football 30 meters at a speed of 15 m/s. How long was the football in the air before Laurrence caught it for the touchdown?

• 450 s

• 2 s

• 0.5 s

• 3 s

Tags

NGSS.MS-PS3-1

Explain why this picture demonstrates Newton's 1st Law of Motion.

An object at rest remains at rest, and an object in motion remains in motion unless acted upon by an unbalanced force.

• 1st Law of Inertia

• 2nd Law of Force, Mass, Acceleration