Physical Science 1st Semester Exam

A _ is a standard for comparison.

• hypothesis

• control

• dependent variable

Before designing and carrying out an experiment, one should find out what is already know about the topic by _.

• researching information

• analyzing data

• forming a conclusion

The part of an experiment in which all conditions are kept the same is the _.

• constant

• control

• conclusion

To reveal trends in data, the data should be presented in a(an) _.

• hypothesis

• operational definition

• graph

A possible explanation for a set of observations or answer to a scientific question is called a _____.

• prediction

• hypothesis

• theory

• law

The steps commonly used by scientists in gathering information to test hypotheses and solve problems are called _____.

• descriptive research

• pure science

• scientific methods

• applied science

What happens when two forces act in the same direction?

• they cancel each other out

• the stronger one prevails

• they add together

• their sum divided by two is the total force

The force that one surface exerts on another when the two rub against each other is called _____.

• friction

• acceleration

• inertia

• gravity

Which of the following is an example of rolling friction?

• your shoes on a sidewalk as your as you walk

• bike tires on the road as you ride

• a boat on the water as it sails

• two hands rubbing together

The achievement of lifting a rocket off the ground and into space can be explained by _____.

• Newton's first law

• Newton's second law

• Newton's third law

• The law of conservation of momentum