7 Ch. 1 Science Inquiry

In a controlled experiment, how many independent variables can be worked with at a time? 

• one
• none
• two or more
• how ever many makes sense.

When experimenting with the growth of a plant, 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

• All of the above

Something that is changed or tested in an experiment.

• independent variable
• dependent variable
• controlled variable

Something that changes as a result of the experiment.

• independent variable
• dependent variable
• controlled variable

A good testable question and a good hypothesis must be..

• Approved by the National Science Committee
• Based on prior knowledge
• Written in present tense
• Testable & measurable (independent & dependent variables)

In the year 1990, tadpole populations began to ___________________ rapidly.

• decrease

• increase

• stayed the same

• first decreased, then increaed

Which  phylum has the smallest number of species?

• Acrasiomycota
• Rhizopoda
• Chlorophyta
• Bacillariophyta

Your teacher has asked you to explain the difference between quantitative and qualitative observations. Which statement is correct?

• A  Quantitative uses numbers, qualitative uses the senses.
• A  Quantitative uses the senses, qualitative uses numbers.
• A  Quantitative uses measurement, qualitative uses numbers.
• A  Quantitative uses colors, qualitative uses the senses.

Which of these can change when new evidence is presented?

• theory

• law

Which of these explain how a natural phenomenon works or happens?

• theory

• law

Tags

NGSS.HS-ESS1-2

NGSS.HS-ESS1-5

NGSS.HS-ESS2-4