GrowGrow Grass Grass Grow Grow

PurposePurposeWhich type of water would Which type of water would

make the grass grow better make the grass grow better pond, tap or salt? pond, tap or salt?

HypothesisHypothesis I think pond water would grow the best I think pond water would grow the best

because it does not have chemicals in it to because it does not have chemicals in it to affect its growth.affect its growth.

I think tap water would grow, but not as good I think tap water would grow, but not as good as pond because it has chemicals in it that as pond because it has chemicals in it that make it ok to drink. make it ok to drink.

I did not think salt water would grow at all I did not think salt water would grow at all because I thought the salt in the water would because I thought the salt in the water would stop it from growing.stop it from growing.

Materials Materials The materials I used in my project

were 9 pots,1 bag of soil, tap, salt and pond water, 3 novo-meds (for watering) and a measuring cup.

MethodMethodStep: 1. Gather materials.Step: 1. Gather materials.2. Put soil in pots (1 cup).2. Put soil in pots (1 cup).3. Put 1 inch hole in middle of pot to put 3. Put 1 inch hole in middle of pot to put

seeds in.seeds in.4. Put 12 seeds in each hole.4. Put 12 seeds in each hole.5. Cover hole with soil.5. Cover hole with soil.6. Water grass as needed.6. Water grass as needed.7. Watch for first signs of grass.7. Watch for first signs of grass.8. Record watering and when grass comes.8. Record watering and when grass comes.9. Measure grass as it grows.9. Measure grass as it grows.10. Select the best type of water. 10. Select the best type of water.

Variables

Manipulated variable – Type of water

Responding variable – Height of grass.

Controlled variable – Amount of soil and

seeds. Pots they are in.

Type of water. Amount of

light and, placement under light.

ResultsResults I used 3 pots per type of water, so I I used 3 pots per type of water, so I

had the experiment done 3 times. had the experiment done 3 times. At the end I record the tallest piece At the end I record the tallest piece

of grass per pot. of grass per pot. This is the information I obtained. This is the information I obtained.

9 pots 9 measurements9 pots 9 measurements

  Pond     Salt     Tap

Pot #Height

mm Pot #Height

mm Pot #Height

mm

2 375 4 0 1 52

6 316 7 0 3 325

8 266 9 0 5 387

     

Average of experimentsAverage of experiments  Pond     Salt     Tap

Pot #Height

mm Pot #Height

mm Pot #Height

mm

2 375 4 0 1 52

6 316 7 0 3 325

8 266 9 0 5 387

Total 957     0     764

Average 319 0 254.6667

AnalysisAnalysisFor my analysis I first recorded my For my analysis I first recorded my information in 2 charts, all information and information in 2 charts, all information and data averages. data averages.

Then I used excel to graph this information. Then I used excel to graph this information.

The first graph you will see is all data, and The first graph you will see is all data, and the second one is the averages. the second one is the averages.

0

100

200

300

400

Height

Grouth

P1

P2

P3

S1

S2

S3

T1

T2

T3

0

50

100

150

200

250

300

350

Millimeters

Pond Water Salt Water Tap Water

Type of Water

Growth Average

ConclusionConclusion In conclusion, I figured out that In conclusion, I figured out that

my hypothesis was correct.my hypothesis was correct. Pond water grew grass better Pond water grew grass better

than tap or salt water.than tap or salt water. The average height for my grass The average height for my grass

grown with pond water was grown with pond water was 319mm, and tap was 319mm, and tap was 254.6667mm.254.6667mm.

Note!!!!!!Note!!!!!! Although the average pond Although the average pond

water growth was the tallest, water growth was the tallest, one of the tap water pots was one of the tap water pots was the tallest.the tallest.

Tap water would have had the Tap water would have had the best average except one of the best average except one of the pots growth was behind the pots growth was behind the other two.other two.

While the growth range of pond While the growth range of pond was only 109mm, tap water was was only 109mm, tap water was 335mm. 335mm.

Sources of error• Draft from the door on the right

side.• Heat from my dads office on the

left side.• To know if all seeds were equal.

Ways to improveWays to improveHaving sunlight instead of artificial Having sunlight instead of artificial

light.light.

Having a way to see if the seeds I put Having a way to see if the seeds I put in the pots were seeds not just shells. in the pots were seeds not just shells.

Testing salt and pond water for Testing salt and pond water for impurities.impurities.