Answer: D). Most rocks are a mixture of minerals
Rocks are the natural substances these are the aggregate of one or more number of minerals. These minerals are responsible for chemical and physical nature of rocks. These are responsible for type of particles, texture of particles and overall rock structure. Example of rock having mineral aggregate is granite which is a combination of minerals like quartz, biotite and feldspar.
Answer:
5. when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent
6.They are moving toward each other
7. The Nazca Plate is bounded on the west by the Pacific Plate and to the south by the Antarctic Plate through the East Pacific Rise
8.Convection currents in the mantle drive plate tectonics. Convection is the reason for ocean currents. Ocean currents result from two processes - the action of wind on the surface of the water, and from variation in water temperature that causes movement.
Both the mantle and ocean experience the heat transfer due to bulk movement of molecules within fluids such as gases and liquids, including molten rock; this is called, again, convection.
There are several things that can cause water erosion. The one that is not a means of water erosion is natural springs. The correct answer is C.
As you go up in an ecosystem the bigger animals have less energy. While the organisms down at the bottom like plants that create their own energy have greater amounts. This is because energy is rated doing everyday things. As energy travels up the food pyramid, it looses more and more energy. This is knower as the 10% rule. In which every time you go up 10% of energy is lost.
