Scientific Method, Variables, Observations Quiz Practice

When doing an experiment to see which fertilizer works the best on plants, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent

• Independent

• Control

• Compound

What kind of observation is this: The tree has several branches.

• Qualitative

• Quantitative

What graph would you use to look at trends or changes over time?

• Bar Graph

• Pie Chart

• Line Graph

• Histograph

An observation is

• the same as an opinion

• only uses what you see with your eyes

• using one of your senses to gather information

• compares data to reach a conclusion

Sam wanted to know if the color of the chair you sat in when taking a test affected your test grade. What is the dependent variable.

• Color or chair
• Grade on test
• Age of students

Robert wanted to know if the type of phone you used gave you better or worse service. What is the independent variable. 

• Location of phone call
• Type of phone
• How good the service was

What type of statement is a hypothesis?

• accept or reject

• If....Then

• qualitative

• I think...because

The clouds are grey and ground is wet. 

• Qualitative
• Quantitative

Which variable needs to stay the same?

• independent

• dependent

• controlled

• extraneous

Mrs. Wheeler wants to see if studying time affects test scores...She gives all 6 classes the same assignment but assigns different study times. What is the controlled variable?

• Study Times

• Test Scores

• Same Assignment