According to the scientific method, how does a physicist formulate and objectively test hypotheses?

• by defending an opinion

• by interpreting graphs

• by experiments

• by stating conclusions

Tags

NGSS.MS-PS1-2

NGSS.MS-PS2-2

NGSS.MS-PS3-4

In the steps of the scientific method, what is the next step after formulating and objectively testing hypotheses?

• interpreting results

• stating conclusions

• conducting experiments

• making observations and collecting data

Why do physicists use models?

• to explain the complex features of simple phenomena

• to describe all aspects of a phenomenon

• to explain the basic features of complex phenomena

• to describe all of reality

Tags

NGSS.MS-PS1-1

NGSS.MS-PS4-1

What two dimensions, in addition to time, are commonly used by physicists to derive additional measurements?

• length and mass

• area and mass

• length and time

• velocity and time

Tags

NGSS.MS-PS3-1

The SI base unit used to measure mass is the

• meter.

• second.

• kilogram.

• liter.

The SI base unit for time is

• 1 day.

• 1 hour.

• 1 minute.

• 1 second.

How does a scientist reduce the frequency of human error and minimize a lack of accuracy?

• Take repeated measurements.

• Use the same method of measurement.

• Maintain instruments in good working order.

• all of the above

The Greek letter Δ (delta) indicates a(n)

• difference or change.

• sum or total.

• direct proportion.

• inverse proportion.

What is the speed of an object at rest?

• 0.0 m/s

• 1.0 m/s

• 9.8 m/s

• 9.81 m/s

Which of the following is the equation for average velocity?