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Variables Extensions - If you would like more challenge relating to variables!



4/18/12 and 4/19/12:

We began our new science unit, Variables. We started out investigating Pendulums. We completed an experiment after which we proved how important variables are to a scientific experiment.

Key vocabulary: Pendulum, Cycle, Variable

-A variable is anything that you can change in an experiment that might affect the outcome.-A mass hanging from a fixed point that is free to swing is called a pendulum.-The number of swings of a pendulum might be affected by mass, length, or starting position.

Here is our data from our first two days of experimenting:
What a difference after the second trial! The second trial was a result of standardizing the procedure used to perform the experiment.

Group/Trial #1/ Conditions /Trial #2
1
26 times
(21-26)
Tested 6 times
Different angles
Back and forth was 2
13
2
26 times
(24-27)
Tested 5 times
Held hand still
13
3
24 times
(21-24)
Tested 5 times
Taped to Phillip’s finger
Phillip’s hand moved
13
4
28 times
(28-30)
Varied angles
13
5
Four trials
(23-26)
Varied angles
13
6
17 times
39 times
Varied angles
14
7
26 times
180 degree angle
13
8
23 times
26 times
180 degree angle
13
9
24 times
45 degree angle
12

Next, we experimented with the mass. What happended when we increased the mass of the pendulum?

4/24/12:

Since the mass did not change the number of swings, what else could we try?

Today we experimented with lengths of swingers. What happened as we experimented and collected data relating to length?

*Remember, we have standardized the testing procedures such as release point and position, mass, and counting a full cycle. The only variable changing today is the length of the swinger. Why is this signficant?

-A standard is the basic procedure used in a controlled experiment, before changing any of the variables.
-A controlled experiement is one in which one, and only one, variable is changed in order to assess its effect.

4/25/12:

Today we continued investigating length as the variable. We proved the following:

-Mass and release positions do not affect the number of swings of a pendulum; length does.
-As the length of the pendulum increases, the number of swings decreases.

We utilized graphing skills to analyze the data.


picture_graph.JPGtwo_coordinate_graph.jpeg


4/27/12:
We finished up the first investigation. Students were responsible for completing the response sheet. It is due Wednesday 5/2.

5/2/12:
Please turn in your RESPONSE SHEET. Please visit the Science Stories page. You will create a new page and link it to your team's Variables page. You will read three stories and investigate questions from each story.

5/9/12:
Today we will investigate life boats. You and your group will follow the instructions on how to construct a boat and then you will load the boat with "passengers" to see how many "passengers" your boat will hold. Next, we will share results. Last, we will begin to have a conversation about capacity.

Here are the results after we gathered data:

Lifeboats data 1.pdf

5/14/12:
Today we designed three more lifeboats, tested the number of pennies each held and then measured the capacity. We noticed a relationship between the capacity and the amount of passengers our boats would hold. We will be able to use this data to make predictions about passengers based on capacity.

(PICTURES FROM TODAY ARE ON THE T:DRIVE IN THE MALISZEWSKI HANDOUT FOLDER, WITHIN THE VARIABLES FOLDER)


5/16/12:

Today we accomplish the following:
1. Finish gathering data about lifeboat capacities and the number of passengers each capacity will hold.
2. Graph the data, analyze patterns and make predictions based on data.
3. Evaluate a hypothetical experiment to determine it's validity.
4. Clean-up and begin to investigate FLIGHT. You will read a story about flight, create a section on your team's wiki page about flight, and generate a list of questions that you have relating to flight.