Scientific Method

What is the independent variable in this research question: What is the effect of the insulation bag thickness on how fast the ice melts?

• how fast the ice melts

• how cold the ice is

• insulation bag thickness

• insulation bag material

What is the dependent variable in this research question: What is the effect of amount of fertilizer on the height of a basil plant?

• amount of fertilizer

• amount of water

• type of fertilizer

• height of a basil plant

You are doing an experiment to understand how adding sugar to water can change the freezing temperature of water. Which of the variables below are control variables

• amount of sugar

• type of sugar

• type of water

• the freezing temperature of water

You are doing an experiment to understand how adding sugar to water can change the freezing temperature of water. Write an example materials list below.

How many versions of an independent variable do you need?

• 1

• 2

• 3

• 4