U2, L2 Scientific Tools and Measurement

A scientist wants to track a hurricane and predict where it will go next. What is the best tool for the scientist to use?

• a computer

• a hand lens

• an electron microscope

• a magnetic resonance image

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

NGSS.MS-ESS3-2

Which of the following is the most likely reason why scientists use approximate measurements?

• Scientists do not use approximate measurements as that would be unscientific.

• Scientists use approximate measurements to determine whether the data they collected is reasonable.

• Scientists use approximate measurements to record images of objects or environments in a brief interval of time.

• Scientists use approximate measurements to help take measurements that cannot be detected by the senses alone.

Why was the International System of Units (SI) developed?

• It was developed to compete with the English Standard System of Units.

• It was developed to allow countries to follow their own systems of measurement.

• It was developed to help scientists keep their data, observations, and measurements secret from other scientists.

• It was developed to help scientists compare measurements made by different people in different locations using different tools.

The image attached shows four measurements (small dots) and an actual value (larger center).

How can we describe these measurements in terms of accuracy and precision?

• The measurements are accurate but not precise.

• The measurements are precise but not accurate.

• The measurements are both accurate and precise.

• The measurements are neither accurate nor precise.

You are making a measurement using meters and find that the number value is 10. What is the correct way to write this scientific measurement?

• meters

• 10

• 10 meters

• meters 10

A ___________________ is a description that includes a number and a unit.

• measurement

• scientific notation

• accuracy

• precision

_______________________ is a short way of representing very large numbers or very small numbers.

• measurement

• scientific notation

• precision

• accuracy

___________________ is a description of how close a measurement is to the true value of the quantity being measured.

• measurement

• scientific notation

• accuracy

• precision

______________________ is the exactness of a measurement.

• measurement

• scientific notation

• accuracy

• precision

What is 12,345 in scientific notation?

• 12,345 x 10³

• 12.345 x 10^-3

• 123.45 x 10²

• 1.2345 x 10⁴