Steps of the Scientific Method
Scientific Concepts
MR. CHEDDR
Cells and DNA
Growth & Development, Metabolism, and Homeostasis
100
What is the first step of the scientific method?
State the problem or pose the question.
100
What is an independent variable in an experiment?
The variable that is changed or manipulated during the experiment.
100
What does the "M" in MR. CHEDDR stand for, and what does it involve?
Metabolism; it involves consuming nutrients to obtain energy for chemical reactions that sustain life.
100
What is the basic unit of structure and function in all living organisms?
The cell.
100
What is the process of getting bigger in size called?
Growth.
200
Which step involves forming an educated guess that can be tested?
Form a hypothesis.
200
What type of data involves descriptions, such as colors or textures?
Qualitative data.
200
What characteristic of life is defined by the ability to maintain a stable internal environment?
Homeostasis.
200
What are the two main categories of cells?
Prokaryotic cells (without a nucleus) and Eukaryotic cells (with a nucleus).
200
Give an example of how the human body maintains homeostasis.
The human body regulates temperature through sweating to cool down or shivering to generate heat, maintaining a stable internal temperature.
300
What is the purpose of creating charts/graphs in the scientific method?
To organize and interpret results using charts and graphs to draw conclusions.
300
What is a constant in a controlled experiment?
The factors that do not change during the experiment
300
What is the difference between asexual and sexual reproduction?
Asexual reproduction involves one parent producing genetically identical offspring, while sexual reproduction involves two parents and produces offspring with a unique combination of genetics.
300
What is DNA, and what is its main function?
DNA (Deoxyribonucleic acid) is the genetic material that stores instructions for growth, reproduction, and cell activities.
300
What is an example of Development?
Puberty, Metamorphosis, etc.
400
In which step do you share your results and determine if your hypothesis was accepted or rejected?
Make conclusions.
400
Which type of graph would you most likely make if your independent variable is qualitative?
A bar graph
400
Which characteristic of life involves organisms responding to stimuli, and give an example.
Response to Stimuli; Example: Touching a hot pan (stimulus) and pulling your hand away (response).
400
How is DNA passed from parent to offspring?
Through genes, which are the units of inheritance that transmit genetic information.
400
What is the main difference between autotrophs and heterotrophs in terms of metabolism?
Autotrophs produce their own food, while heterotrophs need to consume other organisms for energy.
500
What is the role of the control group in an experiment?
To serve as a baseline to compare results and see the effect of the independent variable.
500
Why is it important to keep all other variables the same except for the independent variable in an experiment?
To ensure that any changes in the dependent variable are due to the independent variable and not other factors.
500
What does "E" stand for in MR. CHEDDR, and how does it affect populations over time?
Evolution; it involves changes in the genetic makeup of populations over long periods, helping them adapt to their environment.
500
What is a genome?
The entire "library" of genetic instructions that an organism inherits.
500
What is homeostasis, and why is it vital for living organisms?
Homeostasis is the maintenance of a stable internal environment despite changes in the external environment. It is vital because it ensures that conditions within the body remain optimal for cell function.