1st Quarter Exam Review

Which statement below explains the possibility for a distance versus-time graph to be a vertical line?

• It is not possible.

• When an object is moving at a constant speed.

• When an object is not moving.

• When an object is moving 2 meters per second

Refer to the graph and answer the following question.

What is the speed of the car during the first 3 seconds?

• .05 centimeters per second

• 20 centimeters per second

• 3 centimeters per second

• 180 centimeters per second

Tags

NGSS.MS-PS3-1

What happens when an unbalanced force acts on an object?

• The force must be greater than the reaction force.

• The force is equal to the weight of the object.

• The motion of the object changes.

• The motion of the object does not change.

Tags

NGSS.MS-PS2-2

Which of the following demonstrates an unbalanced force?

• A dog pushes its dog dish to the left with a force of 4 N. A cat pushes it to the right with a force of 4 N.

• A child pushes a toy car to the left with a force of 3 N. Their parent pushes the same toy car to the right with a force of 3 N.

• A woman pushes a bike to the right with a force of 10 N. Another woman pushes the same bike to the left with a force of 10 N.

• A man pushes a desk to the right with a force of 16 N. Another man pushes the same desk to the left with a force of 10 N

Tags

NGSS.MS-PS2-2

During field day, team E and G combine to compete against team F and H.

What conditions would be necessary in order for teams F and H to win?

• One person on team E and G falls down and their team loses a force 112 N.

• One person on team E and G falls down and their team loses a force of 100 N.

• One person on team F and H pulls harder with an additional force of 75 N.

• Two people on team F and H pull harder with an additional force of 50 N each.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What happens when light passes from air into water?

• The light speeds up

• The light continues at the same speed

• The light slows down

• The light forms a mirage

Tags

NGSS.MS-PS4-2

In which medium does sound travel the slowest?

• Air

• Silver

• Steel

• Plastic

Tags

NGSS.MS-PS4-2

Which of the following shows repeated trials in an experiment but does NOT show replication?

• Samuel writes his own procedures and then has a friend complete 20 trials.

• Leslie writes her own procedures for her group to follow.

• Joshua conducts an experiment by following the procedures given to him by his teacher.

• Katelyn conducts an experiment that requires her to throw an object at a target 20 times.

What is the independent variable in the data table above?

• the number of trials

• the number of chirps

• the number of crickets

• the temperature

Ptolemy, believed that all objects in space, including the sun, revolved around Earth. Nicolaus Copernicus made observations showing that Earth and other planets revolved around the sun, which refuted Ptolemy’s argument. What is this an example of?

• Scientific knowledge starts as a scientific theory and becomes a scientific law.

• Scientific knowledge is communicated between scientists.

• Scientific knowledge always stays the same.

• Scientific knowledge changes as a result of new evidence.