A scientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas. They are each made of matter. Some are compounds and some are elements. They all contain atoms. [ -best describe all of the materials he is using in the investigation. ]
The answer is D because microbiology is concerning all tiny living organisms. Therefore A is invalid because bacteria,viruses,and parasites are not the only micro organisms.
If you shake sugar and sand in a test tube it makes a mixture.
False a watershed is an area of land that contains a common set of streams and rivers that all drain into a single larger body of water