Scientific Method
What is the first step in the scientific method?
Identify a problem.
A teenage boy is growing taller and heavier every day. This is an example of which characteristic of life?
Growth and Development
Unicellular means...
An entire organism is made up of one single cell.
What is the independent variable?
The factor that is changed and tested.
Give an example of quantitative data.
"the tree is 5ft tall"
"the cat weighs 10 lbs"
"the water reduced to 3 mL"
"If it is hot out, then there will be more bugs" is an example of what?
Hypothesis.
Photosynthesis is an example of which characteristic of life?
metabolism
What is an example of a multicellular organism?
A human, a plant, etc.
True or False. A virus is considered to be a living thing.
Give an example of qualitative data.
"the plants looked healthy"
"the water was merky"
"the room smelled"
"the object was smooth"
True or False: Collecting data is the final step of the scientific method.
FALSE! After data is collected, the last step is to form a conclusion.
What is cellular organization?
Organisms have many different cells with specialized functions- muscle cells on one place, eye cells in one place, etc.
What is homeostasis?
What is the dependent variable?
The factor that is measured or observed.
The dependent variable DEPENDS in the independent variable.
What is the control group in an experiment?
This is the group that is not being tested and is used for comparison.
For example, if an experiment is testing the effect of using different liquids ( one plant is fed gatorade, another is given coffee, another is given soda, and te last one is given juice) to water plants, the control would be the plant that is given just regular water.
Step 4 in the scientific method is to "collect data". What are the two types of data that can be collected?
Qualitative (describes characteristics of something)
Quantitative (uses numbers to explain something)
Provide an example of an adaptation.
Example: Giraffe's have long necks so they can reach food on tall trees.
Example: Ducks have webbed feet so they can swim faster.
A single parent organism reproduces by itself.
Examples: sponge, bacteria, etc.
ANSWER BOTH QUESTIONS:
What are the control variables?
What is another word for control?
The control variables are factors that are the same for all groups. Another word for control is CONSTANT.
"An idea or conclusion that's drawn from evidence and reasoning" is...
an INFERENCE
Name the 6 steps of the scientific method.
1. Identify a problem.
2. State observations about the problem.
3. Form a hypothesis about the problem (if...then...)
4. Design an experiment to test the hypothesis
5. Collect Data
6. Form a conclusion
List all 8 characteristics of life.
1. Cellular Organization
2. Reproduction
3. Metabolism (obtaining and using energy)
4. Homeostasis
5. Heredity
6. Responsiveness
7. Growth and Development
8. Adaptation
What is Spontaneous Generation?
An explanation for the origin of life that says things just appear out of thin air.
"POOF!"
Famous experiments that disproved this were:
1. Redi's Experiment
2. Pasteur's Experiment
Which scientist designed the swan neck flask experiment, officially putting an end to the theory of spontaneous generation?
Louis Pasteur
"A hypothesis or body of hypotheses that have been supported with repeated testing" is
a THEORY