Lesson 1: The Scientific Method And Homeostasis

Question 1

What is the main focus of the chapter on Biochemistry?

Answer 1

The molecules that make up living organisms and their functions in living systems.

Question 2

What does the prefix ‘Homeo’ mean?

Answer 2

‘Similar’

Question 3

What does the suffix ‘stasis’ mean?

Answer 3

‘Standing’

Question 4

What is biology the study of?

Answer 4

Living organisms.

Question 5

List the characteristics of all living things.

Answer 5

• Made up of cells
• Maintain structure by taking in chemicals and energy
• Respond to the external environment
• Pass on genetic information
• Evolve/change as populations

Question 6

What is the first part of the Cell Theory?

Answer 6

All organisms are made up of one or more cells.

Question 7

What is the second part of the Cell Theory?

Answer 7

All cells come from pre-existing cells.

Question 8

What is the third part of the Cell Theory?

Answer 8

The cell is the basic unit of structure and organization that performs life functions.

Question 9

What is the scientific method?

Answer 9

A process where biologists ask questions, observe, formulate hypotheses, test them, revise, and make conclusions.

Question 10

What is a hypothesis?

Answer 10

A logical prediction that can be tested through an experiment.

Question 11

Fill in the blank: A hypothesis can be used to propose a _______.

Answer 11

Testable Prediction.

Question 12

What is an example of a hypothesis related to tomato plants?

Answer 12

Green lights are the best lights for tomato growth.

Question 13

What is an independent variable in an experiment?

Answer 13

The factor a scientist manipulates to get results.

Question 14

What is a dependent variable in an experiment?

Answer 14

The factor that responds to changes in the independent variable.

Question 15

What are control variables?

Answer 15

Things held constant in every trial of the experiment.

Question 16

What is a control group in an experiment?

Answer 16

A control group is a sample that undergoes all the same steps in the experiment except the one being tested

It helps establish a cause and effect relationship of the independent variable.

Question 17

What is the purpose of a control group?

Answer 17

To establish a cause and effect relationship of the independent variable

It helps eliminate the placebo effect when testing new medicines and health products.

Question 18

What is a hypothesis?

Answer 18

A testable prediction

Example: ‘If tomato plants are grown under green light, then their tomatoes will be the heaviest.’

Question 19

What is the independent variable in the experiment example provided?

Answer 19

Light

This is what is being manipulated in the experiment.

Question 20

What is the dependent variable in the experiment example provided?

Answer 20

Tomato size

This is what is being measured in the experiment.

Question 21

What are control variables?

Answer 21

Factors that are kept the same in an experiment

Examples include same time of planting and soil conditions.

Question 22

Fill in the blank: A control group helps eliminate the _______ effect.

Answer 22

placebo

Question 23

True or False: The control group is essential for establishing a cause and effect relationship.

Answer 23

True

Question 24

What is the significance of testing different variables in an experiment?

Answer 24

It allows for the observation of how changes in the independent variable affect the dependent variable

This helps validate the hypothesis.

Question 25

What is the Scientific Method?

Answer 25

A specific method by which scientists gain knowledge about the world ## Footnote The scientific method involves systematic observation, experimentation, and analysis.

Question 26

What are the main steps of the Scientific Method?

Answer 26

1. Scientific Question 2. Hypothesis 3. Testable Prediction 4. Experiment 5. Data Analysis 6. Conclusion 7. Report Results 8. Apply to Other Questions ## Footnote The steps may vary slightly but generally follow this flow.

Question 27

Fill in the blank: The hypothesis is a _______ explanation based on observation.

Answer 27

[tentative]

Question 28

True or False: The conclusion is based on data analysis.

Answer 28

True

Question 29

What is a testable prediction in the context of the Scientific Method?

Answer 29

An if/then statement that guides the experiment ## Footnote It predicts the outcome based on the hypothesis.

Question 30

What should be done after analyzing the data?

Answer 30

Draw a conclusion based on the data analysis ## Footnote The conclusion may support or reject the hypothesis.

Question 31

What is the purpose of reporting results in the Scientific Method?

Answer 31

To share findings and apply them to other questions ## Footnote This promotes transparency and further inquiry in scientific research.

Question 32

Fill in the blank: If the hypothesis is not supported, it should be _______.

Answer 32

[rejected]

Question 33

What does it mean to refine a hypothesis?

Answer 33

To improve or adjust the hypothesis based on new data or insights ## Footnote This is part of the iterative nature of the scientific method.