Frederick wanted to findout what soil works best for growing roses. he greq them in potting soil, clay, sand, he found outside his yard. after one week, he measured their height and how many leavesthey had. what is the independent, dependent, control and constant?

maritime tropical may be your answer.

what are the options

oxygen is the first element in group 16 (via) of the periodic table. the periodic table is a chart that shows how chemical elements are related to each other. the elements in group 16 are said to belong to the chalcogen family. other elements in this group include  sulfur, selenium, tellurium,  and  polonium.  the name chalcogen comes from the greek word  chalkos,  meaning "ore." the first two members of the family, oxygen and sulfur, are found in most ores.

oxygen is by far the most abundant element in the earth's crust. nearly half of all the atoms in the earth are oxygen atoms. oxygen also makes up about one-fifth of the earth's atmosphere. nearly 90 percent of the weight of the oceans is due to oxygen. in addition, oxygen is thought to be the third most abundant element in the universe and in the solar system.

in case if a person is bitten by a snake then after contacting the medical control, there is a need to apply a pressure immobilization bandage and try to make the person calm and as still as possible unless and until any medical comes.

try to avoid washing of the bitten region as any venom left on the skin can in determining the snake. make sure to not cut the wound, or try to suck the venom out from the region, and do not apply any kind of tourniquet.