Answer:
Sun(solar energy)
Explanation:
The sun is the ultimate source of energy in our solar system.
The chemical energy in plants all started out with solar energy from the sun.
During the process of photosynthesis;
- green plants manufactures their food using sunlight.
- in the presence of this solar energy, they combine carbon dioxide and water to produce glucose and oxygen.
Photosynthetic reaction simply converts solar energy from the sun into chemical energy.
Almost all animals obtain their own energy needs from the plants converting the chemical energy into other forms of energy.
I think it's a little bad that I know this but the first one is sperm pretty sure and the second not so sure but yeah I hope I helped a little
Correct answer: True
Subsurface mining is one of the types of mining, which is done when minerals that are mined are present below the surface of the earth. This is done because the minerals cannot be obtained from the surface level. Then, in that case, subsurface mining is done.
It is done by constructing a reinforced tunnel down the surface to the place where the mineral resource is present.
Answer:
To electromagnetic radiation can be harmful depending on the frequency of radiation, which can range from microwaves that raise tissue temperatures, infrared radiation that produces heat and burns, x-rays can cause problems such as mutations associated with cancer and cell death , similar to ultraviolet radiation that can range from darkening the skin to promoting the appearance of cancer.
Among the beneficial effects, voltages similar to those produced by the connective system have been developed, to improve the treatment of different musculoskeletal diseases, also some radiation show benefits to treat some types of cancer, they are also used for sterilization of medical instruments or places requiring to be free of bacteria, x-rays are used as diagnostic means for studying bone and related injuries, radiation in the form of laser allows surgical procedures.
