1. Development of Problem & Hypothesis
Sunday, August 04, 2019
Development of Problem & Hypothesis
Packet #2

2. Sunday, August 04, 2019
Problem

3. Problem Definition Recommendations for Developing Problems
Sunday, August 04, 2019
Definition
Scientific question that is to be solved/answered and is in most cases based on one’s observations.
Recommendations for Developing Problems
Keep it precise.
Choose a problem that can be solved experimentally.

4. Sunday, August 04, 2019
Hypothesis

5. Hypothesis Definition
Sunday, August 04, 2019
Definition
A hypothesis is a possible explanation, conclusion or even a guess about an event.
The hypothesis predicts a event that will/will not occur given a set of conditions.

6. Hypothesis II Must be written before experimentation begins.
Sunday, August 04, 2019
Must be written before experimentation begins.
State facts from past experiences, or observations, on which you base your hypothesis
NEW
Should be in the form of an if…then statement.
What is so significant about the if…then statement?
Helps identify the variables necessary to complete an experiment

7. Sunday, August 04, 2019
Variables

8. Variables There are three types of variables Independent Variable
Sunday, August 04, 2019
There are three types of variables
Independent
Dependent
Controlled
Independent Variable
This is the variable that the scientist purposely changes
Dependent Variable
This is the variable that the scientist observes and changes in response to the independent variable
Controlled Variable(s)
These are variables that cannot be changed

9. Variables & Connection to Hypothesis Tree Experiment Example
Sunday, August 04, 2019
Hypothesis
If a plant is exposed to red light, then the leaves will change color
Independent Variable
Color of light
Dependent Variable
Leaves changing color
Controlled variable(s)
Amount of time plant is exposed to light
Soil
Amount of water provided everyday
The hypothesis reflects the independent and dependent variables.
If the dependent variable does this, then the dependent variable does that.

10. Variables & Experimental Design
Sunday, August 04, 2019
Does the experiment have one independent variable?
Scientists must make sure that all other independent variables have been eliminated.

11. Controlled Variables vs. The Control
Sunday, August 04, 2019
Controlled Variable
Are variables that cannot be changed
Control
Is a test in which the independent variable is kept constant
Used as a comparison when the independent variable is changed
Not all experiments will have a control.