Answer: forming a hypothesis
Explanation: When first stating something without forming an experiment you are forming a hypothesis.
Answer:
The phosphorus that erodes from the rocks and soil when dissolved with water, when joined with oxygen, forms the phosphate.
Explanation:
The phosphorus is a chemical elements which is found in nature combined with other components. The phosphorus is characterized by its white color and its unpleasant smell, it is also a very reactive element, this chemical element when eroding from rocks and the soil with the help of water binds with oxygen and is transformed into phosphate.
Phosphate is a chemical element composed of four oxygen atoms and one phosphorus atom; phosphate is an essential component for living things.
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Answer:
Ptolemy included epicycles in his orbits.
Explanation:
Ptolomy's model of the solar system was geocentric, where the sun, moon, planets, and stars all orbit the earth in perfectly circular orbits. The problem with perfectly circular orbit around the Earth is that they do not explain the occasional backward motion, or retrograde motion, of the planets.
The Greeks insisted that the motion of the planets be perfectly circular. Ptolemy modeled the planets making small circles around a point that orbited the Earth. These smaller circles were called epicycles, and they allowed the planets to move backward relative to the background stars.
Somatic mutations are acquired after birth in non-reproductive cells. These changes occur in only certain cells of the body and can be caused by tobacco use, ultraviolet radiation, viruses, chemicals and age. Acquired mutations are the most common cause of cancer.
Humans experience many somatic mutations over a lifetime, and the human body is normally able to correct most of these changes. This is why there is only a small chance of one mutation causing cancer. It normally takes many mutations over a lifetime to cause cancer. This is why older people are the most likely group to get cancer, as they have had more chances for mutations to build up.