Variables
What is the independent variable?
The variable that is changed by the scientist.
What is quantitative data?
Data that can be numerically measured...an amount or QUANTITIY.
What is the proper format for a hypothesis?
If (I.V.) then (D.V.).
Student basketball sign ups have increased while skiing sign ups have decreased over the last ten years. In this scenario, what kind of graph should be used?
A line graph.
What do you do if your hypothesis is refuted?
Ask another question and investigate again.
What is the dependent variable?
The variable that changes based on the independent variable.
What is qualitative data?
Data that describes the characteristic of something. An observation.
In the conclusion, when you write a sentence describing what happened in the lab, this is called the _____.
Claim
The top four breakfast foods students prefer are cereal, waffles, bagels, and eggs. In this scenario what kind of graph should be used.
A bar graph
What bulleted list is always needed when doing a lab?
A materials list.
What is the control group?
The group that results are being compared to. The group that is most like normal conditions.
How do you set up a graph?
I.V. on the x axis and the D.V. on the y axis.
In order to support your claim, what do you always need to refer to?
Evidence - ACTUAL DATA FROM THE LAB
How is the scale determined for the graph?
The scale should be able to clearly show the data in between the highest and lowest numbers.
How many people in this classroom have pets?
I don't know the answer.
What are constants.
Anything in the experiment that stays the same throughout the experiment.
Do you graph the averages or all of the data from the trials and why?
You graph the averages only because those give a more accurate picture of your experiment than every single data point
Reasoning.
What MUST be present on all graphs (four things)?
title, units, labelled x and y axis, a scale that makes sense
What is the difference between the control group and the experimental group?
control group is a test group kept in normal conditions and the experimental group is the group in which variables are manipulated.
Identify the variables that would test the following scenario: Jenny noticed that when she puts olive oil on her hands she does not get dry skin in the winter. What would be the independent and dependent variables?
Olive oil = I.V. Dry Skin= D.V.
Write a hypothesis for the following data: Plant Height (cm): Red light 2, Green light 1, Blue light 4, White light 8
If plants are grown in white light, then they will grow the tallest.
Create a hypothesis for the following relationship: water is related to plant growth.
If plants are watered regularly, then they will survive better.
When making a graph, what must you always use.
A ruler
As a procedure - a numbered list of steps.