Introduction to Physical Science

What two activities are basic to most of science?

• Getting good grades and asking questions.

• Paying attention in class and memorizing

• Observing the world and asking questions

• Observing science and reading answers

Science starts with gathering ________________________ about the natural world.

• hypothesis

• Answers

• Experiments

• Knowledge

Tool used to measure volume

• Balance

• Graduated cylinder

• Meter stick

• Spring scale

Tool used to measure mass is:

• Balance

• Graduated cylinder

• Meter stick

• Spring scale

Jane is investigating to find out if bean plants grow taller in ordinary topsoil or special potting soil over a three week period. She sets up her investigation with 10 bean plants of equal size in each type of soil.

What should Jane do each day to make sure she gets valid results?

• Calculate the average plant height for each soil type.

• Estimate the height of each plant's stem and record the estimate.

• Water only the plants in special potting soil.

• Move the plants in ordinary topsoil to different locations.

A scientist performs an experiment and asks other scientists around the world to replicate it.

Why would other scientists most likely try to perform the same experiment?

• to find out if weather of various regions of the world would affect the results

• to see if the experiment would be less expensive in another part of the world

• to confirm the results of the experiment conducted by the scientist

• to verify that the hypothesis of the experiment is a scientific law

Science experimentation & research is a limitless activity which requires no economic resource.

• true

• false

The independent variable in an experiment effects the dependent variable.

• false

• true

Scientific laws change more frequently than scientific theories.

• false

• true

True or False:

Scientific investigations involve asking questions.

• True

• False