Jill conducted an experiment to investigate which plant food would make her plants grow faster. She tried 4 different plant foods on plants of the same type and age. Jill concluded that the plant that was fed Brand A grew the fastest. Jill did not realize that the plant that was fed Brand A also received more sunlight. What error did Jill make in her experiment *

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.