PhySCI Midterm Review

Which of the following describes accuracy?

• Consistency in measurements

• Closeness to the true value

• Ability to repeat results

• Measurement of precision

What is the primary difference between precision and accuracy?

• Precision is closeness to the true value, accuracy is repeatability

• Precision is about repeatability, accuracy is closeness to the true value

• They mean the same thing

• Precision is only used in qualitative data

What is an observation?

• An educated guess

• A statement based on data collected through the senses

• A measurement using instruments

• A causal relationship

An inference is:

• A statement based on direct observation

• A conclusion drawn from observations and evidence

• A type of measurement

• Always quantitative

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

What is a hypothesis?

• A fact proven by experiments

• An educated guess based on observations

• A type of variable

• A form of correlation

Quantitative data refers to:

• Data that describes qualities

• Data involving numbers or measurements

• Data that cannot be measured

• Data from subjective observations

Correlation means:

• One variable causes a change in another

• A relationship exists between two variables

• Variables are independent

• All correlations are causations

Tags

NGSS.MS-PS3-1

Motion is best described as:

• A change in position relative to a reference point

• Speed over time

• Acceleration over distance

• The force applied to an object

What is displacement?

• The total distance traveled

• The change in position from the starting point to the endpoint

• The speed of an object

• None of the above

A reference point is:

• A stationary object used to describe motion

• An object moving at a constant velocity

• Always at the origin

• Used to measure force