Diagnostics Test

Name the SI base units for length, mass, and time.

• meter (m), kilogram (kg), and second (s)

• liter (L), gram (g), and minute (min)

• inch (in), pound (lb), and hour (h)

• centimeter (cm), milligram (mg), and millisecond (ms)

• 9.2 × 10^8 dm

• 9.2 × 10^7 dm

• 9.2 × 10^6 dm

• 9.2 × 10^9 dm

What must be true about the dimensions (or units) in a valid equation?

• The same dimensions (or units)

• Different dimensions (or units) can be used

• Dimensions (or units) are not important

• Only one side needs dimensions (or units)

Tags

NGSS.HS-PS2-4

NGSS.HS-PS4-1

In the steps of the scientific method, what is the first step?

• making a hypothesis

• stating conclusions

• conducting experiments

• making observations

The symbol mm represents a

• micrometer.

• millimeter.

• megameter.

• manometer.

The SI base unit used to measure volume 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 error and minimize a lack of accuracy?

• Take repeated measurements.

• Use the same method of measurement.

• Maintain instruments in good working order.

• All the above.

Five darts strike near the center of a target. The dart thrower is _____.

• accurate.

• precise.

• both accurate and precise.

• neither accurate nor precise.

Calculate the following, and express the answer in scientific notation with the correct number of significant figures: 21.4 + 15 + 17.17 + 4.003

• 5.7573 × 10¹

• 5.757 × 10¹

• 5.75 × 10¹

• 5.8 × 10¹