Unit 1 Practice Physics H

Which of the following is an area of physics that studies motion and its causes?

Mechanics

A baker makes a loaf of bread. Identify the area of physics that this involves.

thermodynamics

A hiker uses a compass to navigate through the woods. Identify the area of physics that this involves.

electromagnetism

According to the scientific method, why does a physicist make observations and collect data?

  

to ask a question

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

 

by experiments

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

interpreting results

Diagrams are *not* designed to

measure an event or a situation.

Why do physicists use models?

to explain the basic features of complex phenomena

The symbol mm represents a

millimeter

Three values were obtained for the mass of a metal bar: 8.83 g; 8.84 g; 8.82 g. The known mass is 10.68 g. The values are

precise

Why do physicists often use models?

To explain the most basic features of phenomena

Why do calculators often exaggerate the precision of a final result?

They return answers with as many digits as the display can show

Graphs often permit scientists to make ____________________ for times when there is no data.

estimations (or predictions)

What are two possible uses for physics equations?

Any two of the following: summarize data, describe the relationship between variables; make predictions