Chapter 1 Practice Test

1. Which of the following statements about the image shown below is NOT an observation?

• The insect has 3 legs on the left side.
• The insect has a pattern on its back.
• The insect's pattern shows that it is poisonous.
• The insect is green, white and black.

2. The statement "the worm is 2 cm long" is a.

• quantitative observation
• qualitative observation
• inference
• hypothesis

3. An inference is?

• the same as an observation
• a logical interpretation of an observation
• a statement involving numbers
• a way to avoid bias

4. To be useful in science, a hypothesis must be

• measurable
• observable
• testable
• correct

5. Which of the following statements about a controlled experiment is true?

• all of the variables must be kept the same
• only one variable is tested at a time
• everything can be studied by setting up a controlled experiment
• controlled experiments cannot be performed on living things

6. Which of the following is NOT a goal of science?

• to investigate and understand the natural world
• to explain events in the natural world
• to use those explanations to make useful predictions
• accept explanations based on belief, not evidence

7. What is the difference between qualitative and quantitative?

• quantitative uses numbers and qualitative uses words
• quantitative is the description and qualitative is the amount
• quantitative and qualitative mean the same thing and have no difference
• qualitative is used in math class and quantitative is used in science class

8. How does a hypothesis help scientists understand the natural world?

• A hypothesis is the answer to their solution
• A hypothesis suggests a testable explanation for observations about the natural world
• A hypothesis provides the technology to conduct an experiment in the natural world
• A hypothesis can lead you to ask questions about a new skill

9. Why does it make sense for scientists to test just one variable at a time in an experiment?

• only testing one gives you a definite answer to your solution
• only testing one can tell which variable is responsible for your results
• only testing one makes your hypothesis a scientific theory
• only testing one variable makes the results incorrect

10. Distinguish between an experimental group and a control group.

• the experimental group is set up to test the effects of different variables, while the control group is the same as the experimental group except for one independent variable
• the experimental group is the same as the control group except for one independent variable, while the control group is set up to test the effects of different variables