Classify each substance as a pure substance or mixture. copper which consists of only one kind of atom, carbon dioxide which has two atoms of oxygen for each atom of carbon, table salt which can be separated into sodium and chlorine only by chemical process, a solution of sugar dissolves in water, sea water which can be purified by filtering it

Which of the following best describes the formation of plasma?

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

Stage in which a typical star has completely stopped fusion