Question

John and emily were experimenting with the effects of road salt on plant growth. to do this, they watered plants daily with the same amount of salt water. they could best improve their experiment by -

Answer 1

To improve the experiment, John and Emily should vary the concentration of road salt in the water and use a control group of plants watered with plain water.

Step-by-step explanation:

In order to improve their experiment, John and Emily could vary the concentration of road salt in the water they use to water the plants.

By comparing different concentrations of salt water, they can determine the specific effects of road salt on plant growth.

Additionally, they should use a control group of plants that are watered with plain water, without any salt, to compare the growth of plants in different conditions.

This will help them isolate the effects of road salt on plant growth.

Answer 2

They could improve the experiment that they made by adding another variable such as: watering the plants with fresh water. This way they could have a better comparison how plants grow based on the type of water they are exposed with.