Calling the science/chemistry whizzes on the DIS! HELP!

[Cindy B]

Ok, I admit it... I'm a science/chemistry idiot! Maybe this is so easy I am overlooking the obvious.

I have a real hard time with science/chemistry. I have a tendency to overanalyze, and it gets me in trouble. I'm not sure if I have this idea correctly... so I want to know if I am on the right track.

The assignment is The growth of a bean seedling is is affected by tempature. Design an experiment to test this hypothesis. I need to control remember to control for all of the conditions except one. that means two variables...group a and B...for example must have the same conditions exposed to them with one manipulated.

I understood up to the variable part.

Now if I have in my experiment the same seedling, but in three different specific tempature controlled environment (hot, cold and "normal" environment). Obviously, if its not a specific hot/cold seedling (cactus for example), the tempature will affect each seedling. The hot will wither, the cold will make it brittle and the "normal" environment--not too hot or cold will make the seedling thrive.

Did I get it right? Thanks!

PS. If anyone needs any literature, psychology, (Basic or Child), History of Education help, I'd be glad to answer!

 

[depplyinluv]

sounds like you did it right.... do you have a dependent and an independent variable, did you have to have these or are they just the 'variables'?


good job!

 

[Candlemaker]

Well, I would like to add that you may be incorrect with think the hot (depending on how hot) will wilt the seedling. Here is what I would do:

If you want to use temperature as your variable:

Get 3 bean seeds, plant them in identical pots and soil composition. Put one in a normal place in the home, put one where it is cooler and set one up like a greenhouse with a plastic covering, in a warmer but not HOT spot. The warm one will grow faster and if watered properly will grow faster.

Another variable is light, plant them identical like above and put one in a closet with no light, one in a regular place and put one under a growing light all the time. The one under the light will grow faster.

Another variable is the matter that it is planted in. Plant one in potting soil (nice and rich) plant another in Peat, and another in sand. Which do you think will grow fastest? I know!

Good luck...
Depply...her variable is just a tad off....don't ya love science? I DO!

 

[depplyinluv]

honestly, yes i do absolutely adore science...just not my current science teacher...

I was thinking about light and the soil composition as variables, but i didnt know her exact guidelines ....good advice