Question

scientific variables (part 2) identify the variables in the experiment. you decide to test whether plants help prevent erosion of soil or not. you take two samples of soil, and plant grass in one of the samples. once the grass has taken root, you pour water through both soil samples and measure how much soil is removed from each sample. 1. if you were to perform this experiment, what would your hypothesis be? 2. independent variable: 3. dependent variable: 4. control: 5. constants: definitions: independent variable - part of the experiment that is tested or changed by the scientist (starts with the letter i; \i change\) dependent variable - part of the experiment that responds to changes in the independent variable; is measured for results control - part of the experiment that is used for comparison (does not interact with the independent variable). constant - part of the experiment that must remain the same

Explanation:

Step1: Formulate a hypothesis

A possible hypothesis is that plants (grass) help prevent soil erosion.

Step2: Identify independent variable

The presence or absence of grass in the soil sample is what the scientist changes. So the independent variable is the presence of grass in the soil.

Step3: Identify dependent variable

The amount of soil removed is what responds to the presence or absence of grass and is measured for results. So the dependent variable is the amount of soil removed.

Step4: Identify control

The soil sample without grass is used for comparison. So the control is the soil sample without grass.

Step5: Identify constants

Constants could include the amount of water poured, the type of soil (if same), the size of the soil - sample containers, etc.

Answer:

1. Plants (grass) help prevent soil erosion.
2. Presence of grass in the soil
3. Amount of soil removed
4. Soil sample without grass
5. Amount of water poured, type of soil, size of soil - sample containers (among others)