Forward Exam Review

At which points along the marble track is the potential energy of the marble increasing?

• point 1

• point 2

• point 3

• point 4

• point 5

Tags

NGSS.MS-PS3-2

A magnetic toy train is moved away from a magnet that cannot move. What happens to the potential energy in the system of magnets during the movement?

• The potential energy decreases because the train moves in the same direction as the magnetic force

• The potential energy increases because the train moves against the magnetic force

• The potential energy does not change because magnets in the system do not change

Tags

NGSS.MS-PS2-5

NGSS.MS-PS3-2

What is happening between seconds 6 and 8? Note: this is a velocity graph not a position graph.

• Constant speed

• No motion

• Increase in speed

• Decrease in speed

Tags

NGSS.MS-PS3-1

What is the car's velocity?

• km/hr

• 5 km/hr

• 10 km/hr

• 20 km/hr

Tags

NGSS.MS-PS3-1

The line showed in this graph represents a speed that is...

• Negative

• Positive

• Positive and constant

• Negative and constant

Tags

NGSS.MS-PS3-1

A skater pushes back on the sidewalk. Which direction does he go and why?

• forward, law of inertia

• forward, action/reaction Newton's 3rd law

• forward, f=ma (Newton's 2nd law)

• backwards, law of intertia

Tags

NGSS.MS-PS2-1

In which diagram would the block of wood have the greatest acceleration?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the primary reason a metal spoon feels colder than a wooden spoon when both are at room temperature?

• A) Metal is a better conductor of heat than wood.

• B) Metal has a higher specific heat capacity than wood.

• C) Metal is denser than wood.

• D) Metal reflects more light than wood.

Tags

NGSS.MS-PS3-3

Which of the following best explains why a balloon sticks to a wall after being rubbed on hair?

• A) The balloon becomes positively charged and the wall is negatively charged.

• B) The balloon becomes negatively charged and the wall is positively charged.

• C) The balloon becomes charged and induces an opposite charge on the wall.

• D) The balloon and the wall both become positively charged.

In an experiment, a student measures the temperature of a liquid every minute for 10 minutes. What type of graph would best represent this data?

• A) Bar graph

• B) Line graph

• C) Pie chart

• D) Scatter plot