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mart [117]
3 years ago
7

Approximately _____ elements occur naturally on earth.

Biology
2 answers:
zlopas [31]3 years ago
8 0

Answer: Till date 118 elements have been approximately 94 elements occur naturally on earth. Though some of the elements are present in very small quantities. The rest of the 24 elements in the periodic table are synthetic elements. There are almost 80 elements that have a stable isotope and 38 elements have radionucleides which means that they decay over a period of time.





FromTheMoon [43]3 years ago
3 0
<span>Of the 118 elements that have been discovered, 90 of them indisputably occur in nature. There is disagreement over whether four more or eight more occur naturally as a result of radioactive decay of other natural elements. The answer is, therefore, 94 or 98.</span>
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What characteristic of water causes water to stick to the side of a test tube?
bazaltina [42]

Answer:

The characteristic of water that makes this liquid stick to the side of a test tube is called capillarity (Claim).

Explanation:

Water (H₂O) is a polar molecule with the ability to generate van der Waals forces, which is explained by the 4 hydrogen bonds it forms to bind to other substances. The consequence of the forces of the molecular bonds are four properties of H₂O, including surface tension, cohesion, adhesion and capillarity.

- <u>Claim</u>: The characteristic of water that makes this liquid stick to the side of a test tube is called capillarity.

- <u>Evidence</u>: Cohesion and adhesion of water are properties that come from the forces of the molecular bonds of water, and whose effect is the ability of water to wet surfaces and adhere to a tube that contains it, the latter due to capillarity. Capillarity also allows water to rise through the roots and stems of plants, through their thin vascular ducts.

- <u>Reasoning</u>: <u>cohesion</u> in water depends on the force of attraction between H₂O molecules, <u>adhesion</u> is the capacity of H₂O molecules to join other different molecules and —together with <u>surface tension</u>— make H₂O molecules close to the walls of a glass tube adhere to it, which represents capillarity.

The effect of capillarity is more evident when the test tube is of a smaller diameter, although capillarity and adhesion to its walls always exist, and to a greater degree than any other substance.

8 0
2 years ago
How Do Different Liquids Affect Plant Growth?
Leona [35]
It all depends on what kind of liquid it is, if you were to use water, the plant would be fine, but if you were to give it, say, car gas, the plant would most likely die..... I hope this helped!
7 0
3 years ago
Question 5
Goryan [66]
B migration, that is the answer
3 0
3 years ago
At an intercalated disc, At an intercalated disc, the cell membranes of two cardiac muscle fibers are completely separated by a
Aloiza [94]

Answer:

The correct answer is " two cardiac muscle cells are connected by gap junctions".

Explanation:

Intercalated discs are microscopic features seen in the microscope as cardiac fibers, found between the myocardial cells of the heart. These features correspond of two cardiac muscle cells connected by gap junctions. The intercalated discs allow the interconnection of multiple cardiac cell muscles to work simultaneously as a single functional organ or syncytium.

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3 years ago
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7 0
2 years ago
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