Question

Marge Simpson decided to start a new garden in her backyard. She heard that plants compete for space and decided to test this idea. She bought a mixture of flower seeds and some potting soil. She put the same amount of soil into each of 5 plastic cups. In the first cup she planted 2 seeds, in the second cup she planted 4 seeds, in the third cup 8 seeds, and in the fourth cup she planted 16 seeds. In the last cup she planted 32 seeds. After 25 days, she determined which set of plants looked the healthiest. what is the 1 independent variable 2 Dependent variable(DV) 3 Controlled variables 4 Hypotesis

Answer 1

Answer:

The correct answer will be -

1.  Independent variable - the number of seeds

2. Dependent variable - growth of the plant

3. Controlled variables - amount of soil

4. Hypothesis - plant growth is directly proportional to the provided space.

Explanation:

In a scientific experiment, the variables could be categorized as dependent variables(to be studied),  independent variables (can be manipulated) and constant (kept constant).

A scientific hypothesis is the prediction or an idea based on the previous work and observations which could be tested to answer the question.

In the given question, the variables to be tested is growth of the plants while the variables which can be manipulated is the number of seeds. The variable kept constant is the amount of soil added to the cups and the hypothesis will be the plant growth is directly proportional to the provided space.

Answer 2

Given: 
She heard that plants compete for space and decided to test this idea.
She bought a mixture of flower seeds and some potting soil.
She put the same amount of soil into each of 5 plastic cups.
1st cup she planted 2 seeds
2nd cup she planted 4 seeds
3rd cup 8 seeds
4th cup she planted 16 seeds.
5th cup she planted 32 seeds.

After 25 days, she determined which set of plants looked the healthiest.

1 independent variable - NUMBER OF SEEDS PLACED IN A CUP
2 Dependent variable(DV) - APPEARANCE OF THE PLANTS
3 Controlled variables - SOIL PLACED IN EACH CUP
4 Hypothesis - If there is more space that a seed can grow then the healthier the plant is and vice versa.