Hakeem is testing the effects of sunlight on samples of soil. which of these actions would introduce confounding variables into hakeem’s experiment? (this is multible choice question) a. he tests a theory that’s already been established. b. he tests multiple hypotheses at a time. c. he uses identical specimens when completing multiple trials. d. he adjusts the independent variable and records the effects. e. he uses different types of soil in each of his samples.

Use your vocabulary words to complete the sentences below. more of the world's population is now concentrated in heavily populated urban areas known as a this is quite a contrast from the past when or native groups were either farmers or — hunters and gatherers who moved between places in search of food. advanced technology has led to the integration of world economics and cultures, in the world's more developed countries. this integration requires , the responsible use and management of natural resources.

Why is the indus river so important to the people of pakistan?

All of the following came out of china and were exchanged along the silk road, except a. papermaking b. block printing c. buddhism d. compasses select the best answer from the choices provided a b c d