I would think that the answer would be C! Good Luck, tell me if it's correct please! :D
Answer:
Explanation:
Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement
I know what quiz this is i am taking it now the options are
1.)Transport proteins move to large molecules from areas of low concentration to areas of high concentration using cellular energy
2.) Transport proteins move to large molecules from areas of low concentration to areas of high concentration without the use of cellular energy.
3.) Small molecules move from ares of high concentration to areas of low concentration using cellular energy to enter a cell.
4.)mall molecules move from ares of high concentration to areas of low concentration without the use of cellular energy.
Answer:
B. Corundum
Explanation:
Using the Mohs scale of hardness, the mineral has a hardness greater than 6.5 (Steel nail) but less than 8.5 (Drill bit). The corundum has a hardness of 9.0, which means it cannot be scratched by a drill bit, but all the other choices have a hardness scale less than 6.5 but the mineral was not scratched by the nail. So the best answer would be B.
