Testable Question

Title Goes Here

Testable Question

How would adding different amounts of salt to the water supply of a rose affect the growth of the rose over a period of three weeks?

Hypothesis

I believed that adding salt to the water supply would cause the growth of the rose to speed up, because I have seen people spreading salt on the ground outside during winter.

Variables

1) Independent Variables

Amount of salt (in g) added to the water supply of the rose.

2) Dependent Variables

Amount (in cm) that the rose grew after being treated with salt water.

3) Control

Amount (in cm) that the rose grew after being treated with regular water.

Materials

·  5 Roses

·  1 Beaker

·  1 Metric Ruler

·  15 Cans of Salt

·  2100ml Fresh Water

·  5 Plant Pots

·  Soil

Procedure

1.  Recorded initial lengths of rose stems in cm

2.  Planted five roses in pots using Brand X Potting Soil

3.  Mixed 200ml of water with 0, 10, 20, 30, and 40g of salt in separate beakers

4.  Watered each rose with 200ml of one of the above solutions once per day for three weeks (each plant received the same solution each time it was watered)

5.  Mixed more of each solution after each watering

6.  Recorded lengths of rose stems at the end of each week

Data

Rose Stem Growth After Being Watered with Solutions of Varying Salt Content Over Time

Salt in Solution (g) / Initial Stem Length (cm) / Stem Length Week One (cm) / Stem Length Week Two (cm) / Stem Length Week Three (cm) / Total Growth of Stem (cm)
0 / 20 / 25 / 30 / 35 / 15
10 / 21 / 25 / 28 / 32 / 11
20 / 19 / 23 / 25 / 27 / 9
30 / 15 / 17 / 18 / 20 / 5
40 / 25 / 26 / 26 / 26 / 1