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

Sunday, August 04, 2019 Problem

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.

Sunday, August 04, 2019 Hypothesis

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.

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

Sunday, August 04, 2019 Variables

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

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.

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.

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.