Question

I'm studying the following experiment:

https://9arevision.wikispaces.com/file/view/kl%3Bkl'.gif/33170891/kl%3Bkl'.gif

The results given were the following:

Distance of lamp from pondweed/cm VS. Number of gas bubbles per minute.

4cm - 80

6cm - 35

8cm - 20

10cm - 13

12cm - 10

Answer 1

How do I predict the number of bubbles per minute the student might get with a lamp distance of 16cm? I also need to explain how I obtained my answer.

Answer 2

hmm

Answer 3

tricky 1

Answer 4

@tester97 @Elsa213 @Abhisar @anonymous_user help please >.<

Answer 5

@nincompoop @ShadowLegendX @Abhisar

Answer 6

@Cpt.Sparz

Answer 7

Ohhhhhh, you're doing an experiment? :/ I haven't gotten to experiments yet. I just started taking Biology.

Answer 8

Yeah >.< aw, okay, np :)

Answer 9

@Whitemonsterbunny17

Answer 10

This is all it gives you?

Answer 11

Yes, that's all.

Answer 12

I know that as the light intensity decreased the rate of photosynthesis, or the number of bubbles, will slowed down. And that, all of the results concluded that when the lamp was further away from the beaker, less bubbles were produced from the pondweed. So with the lamp now being sixteen cm's away, there will be less than 10 bubbles produced. But, how many? :/

Answer 13

You will have to look at the number of bubbles produced in each distance, and compare them.
For instance, at 4 cm, it was 80, then at 6 it was 35. So find how many less bubbles occurred after that added 2 cm distance.
Do that with each, and see if you find a similarity.

Answer 14

I've tried that, but I can't see a similarity.
45, 15, 7, 3. :/

Answer 15

@Kayne @ikram002p >.<

Answer 16

@dan815

Answer 17

@tester97 @Abhisar @tkhunny @OBEYrolo @paki

Answer 18

@secretx_x

Answer 19

@Somy @jhonyy9 @Jesstho.-.

Answer 20

@hba @hartnn @shrutipande9

Answer 21

have you practically done this experiment?

Answer 22

coz you can't really predict unless you did couple of times

Answer 23

only thing you should know is this :
As light intensity increases (distance between lamp and plant decreases) the volume of oxygen (or the rate of bubble production) increases. This indicates that the rate of photosynthesis increases with light intensity.

However, at sufficiently high levels of light intensity, the rate oxygen evolution remains constant.

Answer 24

@Somy No, I have not done this experiment myself personally, I have to answer from the information given

Answer 25

hmmm well the shorter the distance the more bubbles the longer the distance the less bubbles

Answer 26

so u can just use this idea

Answer 27

Lol, thank you, I knew that from before, and I know the number of bubbles will be less than 10,but I'm not sure about the exact number. I don't know how to work that exact number out >.<

Answer 28

how do you know it? btw does this question have any more details?

Answer 29

Why there will be less than 10 bubbles? Because the distance is 16 cm, and the last distance measured was twelve- he number of bubbles from that was 10. For the 16cm distance it would be less >.< - did that make sense?

No, no more details >.<

Answer 30

.-. why is this not mentioned in the question? and i was thinking how are we supposed to find anything if there is no distance

Answer 31

oh lol i didnt see your post below the post lmao my bad

Answer 32

Lol, the question is in the second post. s'okay x

Answer 33

@PRAETORIAN.10 @Miracrown

Answer 34

hello motto

Answer 35

Hello? >.< can you help?

Answer 36

trying to

Answer 37

lots to read

Answer 38

Can anyone help? >.<

Answer 39

@Compassionate @AngelWilliams16 @sammychahal

Answer 40

>.<

Answer 41

I think one way to go about answering this question is to do some simple regression analysis. I entered the data into excel and added some trendlines. It appears that the exponential (R^2 = .958) and power (R^2 = .998) regressions fit the data the best. According to the exponential model, the equation that best fits the data is: \[f(x) = 185e^{-0.26x}\]According to the power model, the equation that best fits the data is: \[f(x) = 1105x^{-1.92}\]In the two equations, x represents the distance between the lamp and the pondweed and f(x) represents the rate of evolution of gas bubbles. Hence, f(16) in both equations would yield an estimate for the # of gas bubbles per minute if the distance is 16 cm. From the exponential model, f(16) = 3.03. From the power model, f(16) = 5.46.

If you had to give an answer, anywhere from 3 to 5 gas bubbles would be sufficient from these models. I'd lean closer to 5 gas bubbles per minute because the power regression model fits the data slightly better.

Answer 42

I see. I understand :O

Answer 43

WOW, thank you so so so so so so much for the help! :O

Answer 44

You're welcome! :)