Archive for March, 2010
Question: why is a controlled experiment a useful tool in hypothesis-based science?
Answer: A control is something in an experiment that you don’t change, so that you can compare what has changed between the “normal” events and variable or changed events.
For example, if you are trying to see which is better at growing plants soda or plant food. First you buy three of the same plants in separate pots, and set them all in the same area, so they all get the same amount of sunlight. Then you use water for one, plant food for the second one, and soda for the third on. The plant with water is the control because it’s what plants are normally fed in the wild.
Now if you didn’t have the water you couldn’t really see which one was better, so your hypthesis really couldn’t be answered because there is no proof that any one of those is better than the normal conditions.
Amazing I just gave you a good science project, if you still do those. ^_^
Marissa’s HYSTERICAL Science Experiment
Question: I am doing a science fair project on fast food and its affects on the body I need an experiment to go with it.
Any ideas would be helpful!
Answer: You could do something like the guy that did a study on eating McDonalds foods everyday.
Pick one thing like french fries. Eat them every day and see if you gain weight.
Color Changing Milk – Cool Science Experiment
Question: Is this how you’d write step-by-step procedures for a science project on which air freshener lasts longest?
1. Set air conditioner to 76 degrees and make sure it’s on.
2. Keep the fan off.
3. Spray Febreeze for ten seconds around the room.
4. Enter the room every 5 minutes to smell the air freshener.
5. Write down the results.
6. Repeat all steps for second experiment with Oust.
Is this the correct way to write it? If not can you help me. I have to put it on a poster and present it in class.
Answer: That sounds right to me. Just make sure everything stays the same between the two experiments.
How to Make a Periodic Table Science Presentation : Science Fair Presentation Poster Placement