Question

write your answers on the lines below.
maddie is testing different kinds of soil to see which one is the best for growing plants. she fills one cup with a mixture of soil and sand, a second cup with soil and gravel, and a third cup with soil and shredded bark. then, she plants radish seeds in all three cups.

1. write a possible hypothesis for maddie’s experiment.

1. what is the variable in this experiment?

1. how will observation be a part of maddie’s experiment?

Explanation:

Question 3

A hypothesis is a testable prediction. For Maddie's experiment, we can predict the outcome based on the different soil mixtures. A possible hypothesis could be about which soil mixture (with sand, gravel, or shredded bark) will support the best plant growth. For example, we might hypothesize that the soil with shredded bark will be best because bark can retain moisture and provide nutrients as it decomposes.

In an experiment, the variable is the factor that is changed or manipulated. In Maddie's experiment, she is using different types of additives (sand, gravel, shredded bark) with the soil. So the variable is the type of additive mixed with the soil (or the type of soil mixture).

Observation in an experiment involves watching and recording the changes or events that occur. In Maddie's experiment, she will observe the growth of the radish seeds in each of the three different soil mixtures. She can record things like the height of the plants, the number of leaves, the rate of germination, etc. over a period of time. This observation will help her determine which soil mixture is the best for growing radish plants.

Answer:

If radish seeds are planted in soil mixed with shredded bark, soil mixed with sand, and soil mixed with gravel, then the radish seeds planted in the soil - shredded bark mixture will grow the best, because shredded bark can retain moisture and release nutrients as it decomposes, which are beneficial for plant growth.

Question 4