Question

Question 1 (1 point)
While at soccer practice, Abbey runs down the field at 10 meters per second. She has a constant speed and does not change direction.

What is Abbey's acceleration?

a
The acceleration is 0 m/s2 because her velocity increased.

b
The acceleration is 0 m/s2 because her velocity did not change.

c
The acceleration is 10 m/s2 because her velocity did not change.

d
The acceleration is 10 m/s2 because her velocity increased.

Question 2 (1 point)
Shelly wants to find the speed that her dog can run.

What should Shelly do?

a
measure the time the dog runs
b
measure the distance the dog runs
c
measure the time it takes for the dog to run a certain distance
d
measure the size of the dog and the distance it runs
Question 3 (1 point)
A student wants to show the transfer of heat energy without matter. Which investigation design would best help the student?

a
an investigation of radiation through a current in a fluid
b
an investigation of conduction through collisions between particles in space
c
an investigation of radiation through electromagnetic waves
d
an investigation of conduction through the movement of particles through a solid
Question 4 (1 point)
The graph below shows the motion of a cyclist during her ride.

Describe the acceleration of the cyclist.



a
The acceleration of the cyclist is going up
b
The acceleration of the cyclist is constant and non-zero
c
The acceleration of the cyclist is constant and zero
d
The acceleration of cyclist is going down
Question 5 (1 point)
During which interval in the graph is the speed of the object NOT constant?



a
AB
b
BC
c
CD
d
DE
Question 6 (1 point)
Convection ovens are ovens that are advertised to cook food more evenly than a standard thermal oven.

Which statement BEST explains how a convection oven works?

a
Hot air is transferred through heat being radiated from a thermal burner.
b
Hot air is transferred through density differences with hot air rising and cool air sinking.
c
Hot air is transferred through molecule to molecule contact.
d
Hot air is transferred through density difference with cool air rising and hot air sinking.
Question 7 (1 point)
A car travels 40 miles north in the first 40 minutes of a trip. The same car travels 30 miles west in the next 30 minutes of the trip. What can be said about the motion of the car?

a
The car is moving at a constant velocity.
b
The car is decreasing its speed.
c
The car is traveling at a constant speed.
d
The car is accelerating at a constant rate.
Question 8 (1 point)
A student places a cold metal nail in a cup of hot water for five minutes. When she removes the nail from the water, it feels warmer. How does the hot water affect the motion of the metal atoms in the nail?

a
It causes the atoms to vibrate faster.
b
It causes the atoms to stop moving at all.
c
It causes the atoms to vibrate slower.
d
It causes the atoms to move closer together.
Question 9 (1 point)
If a student puts their hand on a cold metal doorknob, how will thermal energy move?

a
Cold moves from the doorknob to her hand
b
Cold moves from her hand to the doorknob
c
Heat moves from her hand to the doorknob
d
Heat moves from the doorknob to her hand
Question 10 (1 point)
Two objects are sitting on a table. Thermal energy is being transferred from one object to another.

When does this transfer of thermal energy stop?

a
when both objects are the same temperature
b
when the two objects are different temperature
c
when one object has completely cooled
d
when one object is much warmer than the other
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Answer 1

Here are the answers:

1. b
2. c
3. c
4. c
5. b
6. b
7. c
8. a
9. c
10. a