Question

It

Find the mistake in the experiment:
Jo read that playing music for plants helps them grow faster. He wanted to test this theory out. He bought 20 plants and kept them in similar
conditions, but in different rooms. One of the rooms was silent. In the other room, he played music continuously, and he also gave the plants
in the music room some fertilizer. He recorded the growth of all the plants for a year, and concluded at the end of the year that the plants that
"listened to music did, in fact, grow taller than the plants growing in silence.
What was Jo's mistake, and how would you design this experiment differently? Answer it at least 3 full sentences.

Answer 1

His mistake was that he also gave the plants in the music room some fertilizer

Step-by-step explanation:

When carrying out a reliable experiment, the only variable should be the question being tested. The question here is whether playing music for plants helps them grow faster. Therefore, all the plants should be grown in exactly the same conditions apart from the presence or absence of music.

However, Jo also added fertilizer to the plants in the room where music was playing. Therefore, we don't know whether the fertilizer or the music caused the plants to grow faster.

Instead, Jo should have not given fertilizer to any of the plants, or given fertilizer to all the plants.