Question

kayden was setting up an experiment for his science fair project and wanted to test the effect of different liquids on plant growth. he placed different types of plants into individual test tubes and used sugar water, salt water, tap water, bottled water, and pond water. he took measurements every day for three weeks and recorded his measurements in a notebook. what could kayden do differently to ensure he has a valid experiment?

Explanation:

To ensure a valid experiment, Kayden should have a control group (e.g., a plant watered with regular distilled water), keep all other variables constant (such as light, temperature, plant type and size at the start), and repeat the experiment multiple times if possible. He should also use a proper measurement method for plant growth like measuring height or leaf - area consistently.

Answer:

Kayden could add a control group (plant watered with distilled water), keep other variables like light and temperature constant, and use a consistent method to measure plant growth (e.g., height or leaf - area).