Answer: alpha
Explanation: Alpha particles are fast moving streams of positively charged particles that are shown to be Helium nuclei. They have a mass
number of 4 and an atomic number of 2 and a charge of +2. Alpha particles are represented as 4He2. When 238U92 becomes 234Th90, it emitted a helium nucleus 4He2. The equation for the decay is 238U92 ---> 234Th90 + 4He2.
Answer:
In primary succession there is no presence of soil or the soil cannot support life in secondary succession there is a presence of soil in which it can support life
Explanation:
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Answer:</h2>
Settlement can be directly turned into <u>sedimentary rocks</u>.
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Explanation:</h2>
Sedimentary rocks are kinds of rocks that are framed by the collection or statement of little particles and ensuing cementation of mineral or natural particles on the sea floor or other places on the earth's crust. Sedimentation is the aggregate name for procedures that reason these particles to settle set up.
The particles that structure a sedimentary shake are called residue and might be made out of geographical or natural debris.
Answer:Primary succession occurs on land that is new and has never had a flora and fauna example: glacier retreats, lava flows. Secondary succession occurs on land that has been cleared example: by fire, of flora and fauna, but which still has viable seeds and spores in the soil.
The innermost cells of the epidermis are continuously dividing through mitosis to form new cells. The newly formed cells move up through the epidermis toward the skin surface, while producing a tough, fibrous protein called keratin.
