The Practice of Science

 

Mary is investigating to find out if bean plants grow taller in ordinary topsoil or special potting soil over a three week period. After Mary went through her steps to complete the Investigation why would she publish her procedures to the public?

• to encourage the scientific community to use their methods

• to show other scientists the importance of taking detailed notes

• to allow other scientists to replicate their results

• to demonstrate how many times their experiment has been replicated

The factor in an experiment that will be changed. 

• dependent variable

• independent variable

• controlled variable

• inferences 

Jonathan and Sarah have performed an experiment and are not sure their results are valid. What should they do to check their results?

• repeat the same experiment

• perform a new experiment

• average their data

• change their lab report

Below are set of statements, which one will be able to be seen as an example of a scientific theory?

• The doctor assumes the medication will cure a cold.

• The engineer says the boat should last on the water for at least 50 years.

• The meteorologist claims a thunderstorm will always produce hail.

• The scientist uses evidence to support the idea that cells come from pre-existing cells.

You use your five senses to describe something

• experiment

• observation

• prediction

• conclusion

Tags

NGSS.MS-LS1-8

The summary at the end of an experiment that explains the results, and referrers to the hypothesis using data.

• materials

• responding variable

• conclusion

• procedures

Which of the following statements best describes how scientific knowledge changes

as new information is discovered?

• It helps advance scientific knowledge.

• It is accepted as true permanently.

• It is thrown out to preserve the old information.

• It hinders the advancement of scientific knowledge.

A series of steps used by scientists to solve a problem or answer a question. 

• metric system

• data collection

• recipe

• scientific method

Tags

NGSS.MS-LS1-1

The test of a hypothesis is called a

• control

• experiment

• dependent variable

• conclusion

“My theory is that everyone is sleepy because the classroom is too

warm.” Which statement best explains how we are using the word theory?

• To describe an opinion that we have.

• To describe circumstances that are always true.

• To describe evidence collected in an investigation.

• To describe a well-supported idea accepted by many people.