Environmental Science Chapter 2 Methods of Science
What is Science? Way to learn about the World
Process by which information is gathered and interpreted
The Scientific Method
Hypothesis A hypothesis is an educated guess Possible explanation for a set of observations Must be based on observations and testable
May be changed or altered
The Scientific Method
Collect and organize data
Observations Can be made through your senses Can be made with scientific tools Observations are usually followed by a question
Research follows questioning
Hypothesizing Determine which direction the investigation will go Hypothesis is followed by a prediction
A prediction is what will happen if the hypothesis is correct
Experimenting Experiments cannot ever “prove” a hypothesis to be true
Experiments must have a control and a variable
Experimenting Factors that were there when the original observation was made
The factor that does not change
Experimenting Any factor that effects the outcome of an experiment
The factor that changes in an experiment
Variables the variable being tested
Grass growth because of the water put on it
Collecting and Organizing Data A record of the results from the experiment
Must be recorded in a manner so they can be interpreted
Graphs can show a lot of information quickly
Forming a conclusion The conclusion either supports or does not support the hypothesis
May lead to another hypothesis
Using the Scientific Method
A farmer notices that his fence is falling down. It hasn’t fallen all the way down, but is only a foot off of the ground. He notices that his sheep are hopping the fence to get to the other pasture. As they are hopping the fence, one of the sheep catches the fence with its foot tearing the fence down. On their way back to the first pasture, the farmer notices the sheep did not hop. He decides to conduct an experiment with his sheep.
Using the Scientific Method Observation: The sheep hopping the fence Hypothesis: Sheep do as the sheep they are following do
Prediction: If the first sheep jumps, then the following sheep will also jump
Using the Scientific Method Experiment: The farmer can have the sheep jump a fence then take it away to see if they will follow the leader.
Control: The group of sheep
Using the Scientific Method Independent Variable: Removing of the fence during the experiment.
Dependent Variable: Whether the sheep continue to jump or not
Using the Scientific Method Data: In table form, How many sheep followed the leader.
Conclusion: does not support the hypothesis
What is your Environment? Environment- Everything that surrounds an organism
Our Environment would include the class, the room, the desks, etc.
What Environments Provide to Organisms
Environmental Science Environmental Science is an integrated science It stems from other sciences including:
Physics: Energy and Motion
Ecology vs. Environmental Science Often refer to the same thing
However, humans have the power to affect the environment on a global scale.
Parts of the Environment Biotic Factors- all living parts of the environment Example: Other students, microbes,etc.
Abiotic Factors- nonliving parts of the environment
What would happen to the deer population if coyotes, wolves and mountain lions did not exist?