Answer: A)
Explanation:
the deposition environment has changed from wind-dominated in the past to stream-dominated today.
See the correct answer is b.)PbS
It can be a compound or a single element. An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements, but carbon, hydrogen, nitrogen and oxygen are only a few that make up the largest portion of Earth.
hopefully that helps
Answer:
chemical change
Explanation:
electrolysis process by which electric current is passed through a substance to effect a chemical change.
Answer:
Antibodies are types of proteins in the body that can prevent diseases. Once a vaccine is introduced into the bloodstream, it immediately causes the production of antibodies to occur by using T-cells and B lymphocytes, or at least, most vaccines work like that.
Explanation:
