Unit Test

Question 1

Obtain a copy of the Student Guide for this lab. Your teacher may provide a copy, or you can click the link to access a copy. Be sure to read the entire Student Guide for this lab. Did you read the Student Guide carefully?

Revolt · Accepted Answer

A: yes

Question 2

The independent variable, or the one that is intentionally manipulated, is .

Revolt · Accepted Answer

A: initial height

Question 3

Using the black numbers on the stopwatch to answer the questions. | What is the most accurate reading of seconds as indicated by the long second hand? | Look at the divisions between 2 and 4. What level of precision does this stopwatch have based on the divisions marked on its face?

Revolt · Accepted Answer

A: 5.3 s

Question 4

Which statements are part of the safety protocol for this lab experiment? Check all that apply.Always wear safety goggles when performing an experiment.Use caution when constructing the track. Pad cars with foam prior to each trial.Ensure that the track is clear before releasing cars.Bolt the ramp to both the floor and desk for support.Report all accidents to the teacher.

Revolt · Accepted Answer

A: Always wear safety goggles when performing an experiment.; B: Use caution when constructing the track.; D: Ensure that the track is clear before releasing cars.; F: Report all accidents to the teacher.

Question 5

What did you include in your question? Check all that apply.

Revolt · Accepted Answer

A: a focus on describing the toy car’s motion; B: a suggestion for a way to change the car’s motion; C: room for observations and an opportunity to look at motion objectively

Question 6

What did you include in your hypothesis? Check all that apply.

Revolt · Accepted Answer

A: The “if” part of the hypothesis refers to changing the height of the racetrack.; B: The “then” part of the hypothesis refers to a measurable difference in speed.; C: The “because” portion of the hypothesis connects the ideas of speed and acceleration.

Question 7

The dependent variable, or the one the response is measured in, is .

Revolt · Accepted Answer

C: speed

Question 8

Look at the divisions between 2 and 4. What level of precision does this stopwatch have based on the divisions marked on its face?

Revolt · Accepted Answer

D: tenths of seconds

Unit Test Answers

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