BIO Lab Experimental Design Quiz

Question 1: What is a hypothesis?

a. Testable explanation

b. Uncertain prediction

c. Prediction statement

d. New theory

a. Testable explanation

Question 2: Match each of the following terms with the appropriate definition:

1 . Hypothesis

2 . Prediction

3. Experiment

a. a procedure that is designed to test the effects) of manipulating variables in a reproducible and reliable way

b. a proposed explanation for a phenomenon based on observations and existing knowledge

c. often expressed as an "if-then" statement; proposes a relationship between the independent and dependent variables.

1 . Hypothesis

• c. often expressed as an "if-then" statement; proposes a relationship between the independent and dependent variables.

2 . Prediction

• a. a procedure that is designed to test the effects) of manipulating variables in a reproducible and reliable way

3. Experiment

• b. a proposed explanation for a phenomenon based on observations and existing knowledge

Question 3: Match each type of variable with the appropriate description.

1. Dependent

2 . Independent

3. Controlled

a. Changes or manipulations made to this variable are done by a scientist conducting the experiment.

b. changes in this variable are measured by the scientist in order to support or disprove the hypothesis.

c. these variables must be kept constant in order to ensure they don't interfere with the results of an experiment.

1. Dependent

• b. changes in this variable are measured by the scientist in order to support or disprove the hypothesis.

2 . Independent

• a. Changes or manipulations made to this variable are done by a scientist conducting the experiment.

3. Controlled

• c. these variables must be kept constant in order to ensure they don't interfere with the results of an experiment.

Question 4: What is the purpose of using positive and negative controls in an experiment?

a. to ensure changes in the dependent variable are a result of manipulating the independent variable.

b. to reduce variability in the results of experiment.

c. to make the experiment reproducible

d. ensure the biological variability will not influence the results

a. to ensure changes in the dependent variable are a result of manipulating the independent variable.

Question 5: A n experiment is a procedure designed to test a hypothesis. A proper experiment must be _____ and reliable, include a _____, and use well-designed variables.

a. Controlled; Reproducible.

b. Reproducible: control

c. Predictable; data

d. Theoretical; model organism

b. Reproducible: control

Question 6 : _____ _____ are non-human species used in research to investigate biological processes.

a. Biological organisms

b. Model organisms

c. Substrate molecules

d. Test molecules

b. Model organisms

Question 7: What is the proper steps of scientific methods?

a. Asking a question, observation, formulate a hypothesis, experiment, collect and analyze data.

b. Observation, asking a question, formulating a hypothesis, experiment, collect and analyze data.

c. Formulate a hypothesis, observation, asking a question, experiment, collect and analyze data.

d. Observation, experiment, collect and analyze data, ask a question, and formulate a hypothesis.

b. Observation, asking a question, formulating a hypothesis, experiment, collect and analyze data.

Question 8: True/False

If the conclusion of an experiment is such that a hypothesis is not supported, then another hypothesis must be developed along with another experiment designed to test it.

a. True

b. False

a. True

Question: 9 An experiment usually has _______ kinds of variables.

a. One

b. Three

c. Five

d. Two

b. Three