Growing Plants

A mixture of decaying organic materials such as rotting vegetables and lawn clippings.

A combination of chemical nutrients including nitrogen, phosphorus and potassium.

The amount of matter in an object.

A small, usually hard structure that contains the embryo of a plant.

A mixture of rock fragments (usually sand, silt, and clay) and organic matter.

A factor that can be changed in an experiment.

A controlled experiment is also called a(n)

• variable test

• legit experiment

• fair test

• smart science stuff

When experimenting with the growth of a plant, a scientist uses the same type of plants, the same amount of light, same amount of water, and 2 different fertilizers. What type of variable is the fertilizer?

• Dependent

• Independent

• Control

• Compound

Students used various temperatures of water to see which one dissolved candy faster. 
What was the Independent Variable?

• Amount of Candy
• Amount of Water
• Temperature of Water
• Time for Candy to Dissolve

In the experiment pictured, a student is testing the effect of the amount of fertilizer on plant growth.  Which of the following is NOT a constant in the experiment?

• amount of water
• angle of light
• type of plant
• amount of fertilizer