3. Our Report Data

The aim of our experiment is to see which chemical does algae survive best in.

The independent variable is the different types of chemical solutions.

The controlled variables are the starting mass of the algae, location of where the beakers are placed, the types of algae, the size of the beakers must be the same, the volume of how much chemicals is poured into each beaker

Our hypothesis: Our hypothesis is that chlorine will make algae die faster than hydrogen peroxide and water will.

  1. Pour 200ml of Chlorine/Bleach into 2 glass beakers.
  2. Pour 200ml of Hydrogen Peroxide into 2 glass beakers.
  3. Pour 200ml of water into 1 glass beaker. (Control Set-up)
  4. Put 50g of algae into all 5 glass beakers.
  5. Place 1 thermometer in each beaker.
  6. Cover all the beakers with cling wraps
  7. Measure the starting mass of each beaker
  8. Observe & measure the mass of the beaker every 2day(3 weeks)

Equipment List
  1. 5 250 ml Glass beakers
  2. 500ml Chlorine/bleach
  3. 500ml Hydrogen Peroxide
  4. 5 Thermometer

Mass/ grams
Mass of algae in Clorox (beaker 1)
Mass of algae in Clorox
(beaker 2)
Mass of algae in hydrogen peroxide (beaker 1)
Mass of algae in hydrogen peroxide (beaker 2)
Mass of algae in water (control set-up)
Day 1 (start)
318.18 g
318.18 g
305.75 g
305.75 g
314.60 g
Day 4
317.95 g
311.80 g
305.55 g
310.53 g
314.40 g
Day 6
317.81 g
311.68 g
305.36 g
310.32 g
313.95 g
Day 7
317.78 g
311.64 g
305.21 g
310.23 g
313.63 g
Day 8


We had 5 beakers, one for the control setup, which contained water and algae. We had 2 beakers for each chemical, chlorine bleach, and hydrogen peroxide. One beaker contained algae from a pond, the other beaker had a moss ball. Each 2 beakers contained 200 millimeters of  either chlorine bleach or hydrogen peroxide. The weight of each chemical was all different

    DAY 4
We first put the algae in the Clorox chlorine and on day 4 of our experiment, the algae turned white. Algae in both Clorox chlorine setups decreased in mass. In set-up 1, the algae decreased slightly (-0.23)grams but for set-up 2, the algae decreased a lot (-6.38grams),. Hydrogen barely kills the algae as the mass of the algae decreased slightly only(-0.20grams). However, we conducted the experiment on two beakers with algae, one set up  And let the majority of the algae to survive, so it is not very suitable to use to get rid of algae. Water barely does anything like the mass of the algae also decreased slightly only (-0.20grams), and allows the algae to live.

We measured the growth/loss of the mass of algae once again. The algae in hydrogen peroxide had bubbles on the bottom of the algae, both beakers containing algae and hydrogen peroxide had a decrease in mass. It turned slightly yellow on the sides of the algae.  The algae in clorox had more bits of algae on the bottom of the glass beaker. Some parts of the algae were still floating. Mass decreased by a little in both beakers. The algae is still white in cover since the last measurement. The algae in water is still as green as the previous experiment, the mass is still decreasing, most probably because there is very little oxygen provided to the algae.


Once again, we measured the loss of the mass of algae. The algae in hydrogen peroxide had bubbles on the algae in both beakers. The mass in both beakers had decreased(0.15grams) and (0.09grams). The fringes of the algaes were coloured slightly yellow. The algae in clorox settled at the bottom of the beaker. The mass still decreased, slightly, 0.03 grams and 0.04 grams. The algae is still white in colour and turning brown in colour. The algae is still green, and the mass is still decreased by 0.32 grams.

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