Environmental Science Chapter 1

A scientific ____________ is a broad explanation for events that is widely supported and accepted as true.

• law
• theory
• observation
• method

A possible explanation to a problem that has not yet been tested. 

• data
• theory
• hypothesis
• fact

Once a theory has been tested and confirmed it cannot be changed.

• True
• False

Martha is curious as to what happened to the dinosaurs.  She is convinced that a virus spread across the earth and killed all the dinosaurs.  Martha’s idea is called a ________.

• hypothesis
• theory
• law
• question

Before a scientific theory is accepted and supported, it has

• Substantial evidence

• supported with peer review

• been tested many times by different scientists.

• All of these

The information you collect while doing your experiment is called

• conclusions

• data

• hypotheses

• procedures

How many independent variables should you have in an experiment?

• two

• as many as possible

• four

• one

A student wants to test the effects of different types of exercise on heart rate.  What would be the dependent variable of the experiment?

• the measurement of heart rate

• type of exercise
• amount of exercise
• time of day exercise occurs

Josie was performing an experiment where she grew the same kind of tomatoes in the same soil and amount of water.  She sat one in the sun and one in a closet for 14 days.  What is the independent variable in Josie's experiment?

• tomatoes
• soil
• sunlight
• water

Which of the following shows the correct sequence for the scientific method inquiry?

• Research, Conclusion, Experimentation, Hypothesis, Observation

• Observation, Research, Experimentation, Hypothesis, Conclusion

• Observation, Research, Hypothesis, Experimentation, Conclusion

• Experimentation, Conclusion, Observation, Research, Hypothesis