Using this article answer the following questions:

1. When you first started reading the article, what were your thoughts?

When answering the question, consider the following: (1) what information were the authors presenting, (2) how were they presenting the information, (3) was this information you already knew or were you learning something new?

 

2. Once you were halfway through the article, did any of the thoughts you had in your answer to question 1 change?

If they did change, what did they change to? Explain why they changed.

If they didn't change, explain why not.

 

3. Once you finished reading the article, were your thoughts any different than what you answered in question 1 and/or question 2?

If they were different, explain how they changed and why.

If they are not different, explain why they didn't change.

 

4. What do the authors suggest at the end of the article, after presenting all the information they did on aspirin and NSAIDs?

After you realize what they are doing at the end of the article, does it change your opinion on the information they presented throughout the article? Do you think they were totally honest with what they presented and how they presented it (did you go an read the references they cited to check up on what they presented)? Could they have possibly presented things in such a way so that your opinion of aspirin was negative and you would be more inclined to agree with their alternative?

Aim: To Analyze Tyndal Effect, Hardness of Water (Metal), germination and growth of seeds using water from Different source. Sample:
1. RO water
2. RO Waste water
3. Tap water
4. Water collected by washing vegetables and fruits.
5. Water from aquarium (fish tank).

PROCEDURE: Collect samples of water about 100 add 50ml of each sample separately in a
glass tumbler. Add 1 drop of dye to each sample and note the colour change and different
among the colors formed in each glass.
Dip the cloth in the coloued water and dry the cloth to analyse the colour variation
Add soap solution to each sample separately and check lather formation.
Sample Intensity of colour Lather formation using soap
1
2
3
4
5
Intensity of colour- (light, dark, darker)
To analyze Tyndale effect, take samples of water separately in the glass tumbler and place it
again the white background (screen). Now allow the light pass through the glass of water in
such away that is has to fall on to the screen.

Note the variations among the intensity of the light while passing to different samples of water.
To analyze the effect the samples of water on seed germination.
Take samples of water separately in a separate glass tumbler soak the seeds for 8 hours then
keep the seeds on tissue paper separately and sprinkle the sample water to find the effect of
water on germinating seeds.


Germination rate ( Slow, fast, faster)
Draw inference referring to the points given below
Germination of seed requires water with nutrient
Lather formation shows mineral salt in water
Colour variation in water after adding dye shows density of water
Intensity of light shows presence of colloidal particles in water.

Questions:
Which water sample is most suitable of seed germination?
Which water sample contains more mineral salt to increase its hardness?
Which water sample is denser?
Which water sample shows more colloidal particles?

you will answer the question how does climate change and human population growth effect each other

Student Work: Making Connections