Question

Ashley hypothesizes that adding coffee grounds to the soil will help the plants grow faster. She designs a controlled experiment to determine if this hypothesis is supported.She grows one group of soybean seedlings under normal conditions. She mixes three tablespoons of coffee grounds into the soil of the second group and grows the seedlings under the same light, temperature, and watering regimen. After three weeks, she measures the height of the seedlings and compares the two groups.Identify the parts of the experiment. Place only one term in each category. You will not place all the terms.

Answer 1

The purpose of this study is to determine the experimental group, the control group, the dependent variable, and the independent variable.

Designing and carrying out an experiment is the best approach to prove whether a hypothesis is true or incorrect. To ensure that an experiment examines exactly what the hypothesis claims, scientists must be cautious in how they construct it.

To ensure that only one factor is being altered in an experiment, the independent variables are therefore divided into two groups.

• The control group
• The experimental group

The control group does not experience any changing variable.

The experimental group receives all of the experiment's circumstances, changes as well as the one variable that the experiment is testing.

In Ashley's experiment:

The experimental group:

• Seedlings grown with coffee grounds.

The control group:

• Seedlings grown without coffee grounds.

The dependent variable:

• Seedling height

The independent variable:

• Soil

Therefore, we can conclude that we understand the concept of the experiment carried out by Ashley.

Learn more about the hypothesis here:

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