User:Azilla000

Problem
How is the growth rate and health of a bean plant affected by the pH of the soil?

Hypothesis
The bean plant will grow best when watered with the pH 7 (tap water) solution as acidic soil will drown the nutrients and basic soil will make it difficult for the plants to take in minerals.

Materials

 * 1) 8 bean seedlings
 * 2) Potting soil
 * 3) Water
 * 4) Vinegar
 * 5) Baking soda

Equipment

 * 1) Measuring cup
 * 2) Ruler
 * 3) 4 Styrofoam cups
 * 4) 4 plastic water bottles
 * 5) Tablespoon
 * 6) Marker

Procedure

 * 1) Keep plant in open sunlight.
 * 2) Water plant with tap water everyday at 4.30 p.m. until it grows up to 4 cm.
 * 3) Take observations everyday before watering it.
 * 4) Then, water plant with its specified pH solution everyday at 4.30 p.m.
 * 5) Take a picture of the plant everyday after watering it.
 * 6) Repeat steps 1 & 2 for every seedling until the plant grows up to 4 cm.
 * 7) Repeat steps 1, 3-5 for every plant everyday.

Variables
Independent variable:
 * 1) *Soil pH; whether it is acidic, basic or neutral.
 * 2) *Atmosphere; cold, warm, hot, etc. All the plants face the same conditions and the experimenter can change them.

Dependant variable:
 * 1) *Height of plant; the growth rate of the plant is affected by the pH of the soil.

Control variables:
 * 1) *Amount of sunlight
 * 2) *Amount of water/solution given to the plant
 * 3) *Type of seed
 * 4) *Type of soil
 * 5) *Location of plant