Question

Jorge wants to know whether music affects plant growth. He puts two identical plants in separate rooms. One room is sunny and has a stereo

playing rock music all day. The other room is quiet and dark. He gives both plants the same amount of water. After two weeks he compares
the plants. The plant in the room with music is green and growing. Leaves on the plant in the other room are turning yellow. He concludes
that music helps plants grow.
What makes his scientific explanation weak?
A He did not have a testable hypothesis.
8. He did not use two different plants in each room.
C. He did not add fertilizer to the plants in either room.
D. He had more than one variable in his experimental conditions

Answer 1

D) because with the plant with music he put the plant in a room with light and very sunny, but the plant with no music was put in a dark room with no light. He needed to have put both plants in a room with light but one plant has music and one doesn't.