Science Project 1B. Our brains are indeed rough

Thursday, July 9, 2009 conclusion

After the whole project , we came out with a conclusion that there's no effect on the tadpoles though PHs were added to the water that the tadpoles lives in . The conclusion was made after we found out that none of the tadpole die after the amount of days that we predicted they will die .
This project wasn't successful. The cause of the unsuccessful might be caused by the amount of PH concentration used was not enough.
But overall , the team enjoyed the process working together.
:D

Yu Ji 6:53 AM

Monday, June 15, 2009 A bit of a mistake

Today, we went back to thw lab to check our results.
We were so shocked we=hen we entered the lab.
The alkaline tadpoles were dead , while the acid tadpoles are still alive.
We ask the lab tech about the happening. He said that maybe the tadpoles starve to death
But when he tested the acidic water, he found out that the acid water has gone up from pH4 to 5.
He assumed that, that maybe the reason that the tadpoles are still alive.
But we accidentally change the water of the alkaline, so we were unable to test the pH.
We replace the alkaline, so maybe we must wait for the results on monday.

Yu Ji 7:25 AM

Monday, June 8, 2009 1st day of project

Today, we started our project.

we ask the lab techician to help us put in the pH

We make the first container to have pH 4.(acid)

The second one has pH 11(alkaline)

the last one was left with normal water.

We sat there to observe but there is no change in the tadpoles.

Maybe we will have to wait for the next few days to observe.

Yu Ji 11:02 PM

Saturday, April 11, 2009

Lower Secondary Science Research Project
Proposal Form

Group Name: Rough Brains
Class: 1b

Name of Members and Signatures:
1) Glynis
2) Sarah
3) Yu Ji
4) Ming Shun
5) Nicholas

Project Title:
What is the effect of pH on the lifespan of tadpoles.

Problem Question:
How aoes the chemical affects the lifespan of the tadpoles

Hypothesis:
Our group's hypothesis stated that, if one tadpole lives in neutral water and another lives in acidic water, the one in neutral will live longer. We feel that a tadpole's water is naturally neutral and if it is anything else it may be in danger of death or injury.

Web-Address (Url) of Project Blog:
roughbrains.blogspot.com

Expected date of research completion:

Project Mentor and Signature:

Apparatus and Materials Needed:
1. 6 containers
2. 6 tadpoles
3. acidic drops
4. alkaline drops
5. indicator strips
6. net
7. tadpole food
8. pure water

Experimental Procedure Setup:
1. Prepare 6 containers
2. Put the tadpole into the containers( one in each containner)
3. Put 10 drops of acidic drop on the first two containers
4. Put 10 drops of alkaline into the next 2 containers
5. Leave the last 2 containers with only pure water
6. Give them one food every day
7. replace the water everyday and put the same amount of pH
8. Make sure that the tadpoles receive the same anount of oxygen by outting them at the same place.
9. The water must also be changed and food must be fed at the same time

Independent variable: Type of pH

dependent variable: We are observing which tadpoles will survive the longest amount of time and which one dies first

controlled variables(constant)
The amount of pH, amount of food, the location, same species of tadpoles, the amount of water and the size of the tadpoles

Yu Ji 1:54 AM