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What is surface runoff?

Surface runoff is a crucial part of the water system. Water evaporates from lakes and rivers, but it must be replenished. While some rain or snow will fall directly into bodies of water, they also need some of the water that falls on land in order to maintain their size or flow. Surface runoff does carry the potential of sweeping up pesticides and other waste products and then polluting a small body of water.

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What is a subscript in science?

Subscripts on the right of an elemental symbol indicate the number of atoms in a molecule for a particular nuclide. Unlike a subscript, a superscript is positioned next to and above another character. Superscripts are used to denote the mass number of an element in chemistry, which is determined by the sum of protons and neutrons. When there is no subscript beside an elemental symbol, it indicates there is one atom present, as the subscript 1 is never shown.\nA subscript can also be used at the end of a parenthesis in a chemical formula, indicating that the enclosed group should be multiplied ..

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Why are the leaves of my plants turning yellow?

The first step to diagnosing the cause of yellowing leaves is to check the roots and drainage of the plant. If the plant isn't draining well, or if an inspection shows damage or compaction of the roots, then repotting, tilling the soil or mulching may be the solution. If poor drainage is evident, then cutting back on watering should also help the plant's health.\nThe most common nutritional deficiency causing yellow leaves in house plants is lack of iron. If the yellowing begins on younger leaves and gradually progresses to older leaves, chances are lack of iron is the cause. Yellowi..

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How much does ice weigh?

Water expands as it freezes. It increases by almost 10 percent in volume. Because of this, ice is lighter than water and takes up more space, which is why you can fill up an ice cube tray with water and the ice cubes will take up more space in each compartment than the water did.\nWhen lakes and ponds freeze over, it is entirely possible for aquatic life underneath to survive. The ice forms a blanket for the water and keeps it at a higher temperature than the outer layer.

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Why is fluorine the most reactive halogen?

Halogens are reactive because the outer shells that orbit the nucleus lack electrons. This makes them eager to grab electrons from wherever they can get them.\nFluorine, whose atomic number is 9, is a violently reactive element. It will even attack glass and noble gases, which are considered inert. Even water explodes when exposed to fluorine. Because of its reactivity, fluorine is never found free in nature, but is found as some type of fluoride.\nAt standard pressure and temperature, fluorine is a pale yellow, poison gas that should not be handled by a non-professional and should certainly n..

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What are the signs of an underactive thyroid?

Mild hypothyroidism typically goes unnoticed because the symptoms are vague and may be attributed to age or daily activities. If two or more symptoms are present and do not go away with time, an appointment with a doctor to have thyroid hormone levels evaluated is sensible—especially for those who are pregnant or may become pregnant. The American Thyroid Association suggests getting tested starting at the age of 35 and every five years thereafter.\nIf left untreated, hypothyroidism may lead to myxedema, which causes cutaneous and dermal swelling, elevated fluid around the heart and lungs, a ..

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How can you reduce your electricity consumption?

Heating and air conditioning are known consumers of electricity. Home owners are advised to utilize sunny days by ensuring the blinds and shades are left open. Closing the windows at night helps retain the heat. All the windows should be closed when the air conditioner is in use.There are multiple electrical devices that are left plugged in, even when they are not in use. The electricity consumption of such devices when in "stand by" mode is equal to that of a 100 or 75 watt bulb left on. Power strips can be employed to switch off stereos, televisions and other home entertainment equipment whe..

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How many codons make up an amino acid?

The codon determines the manner in which the insertion of an amino acid in a polypeptide chain occurs during protein synthesis. A codon is also involved in signaling when protein synthesis is to stop. All of the proteins that are found within the human body are made up of a total of 64 codons. Twenty different amino acids make up all of the proteins found in a human body.

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Can Uranus support life?

For another planet to host the carbon-based living organisms on Earth, certain prerequisites must be met. These include a habitable zone, protective atmosphere, rocky surface and molten core.Uranus is a massive icy ball of methane, water and ammonia. Although it has an atmosphere, the lack of a solid surface signifies the absence of nutritive components to provide the vital energy that drives essential life processes. Even if the planet contains a rocky core as some scientists suspect, the tremendous pressures and temperatures inside Uranus would crush terrestrial life forms.

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What are some facts about animal cells?

Animal cells are eukaryotic cells, which are cells with a nucleus and organelles inside of cell membranes. A nucleus contains the DNA material for eukaryotic cells. Organelles are structures within a cell that carries out specific functions, such as providing energy, producing hormones or creating enzymes.\nPlant and animal cells are both eukaryotic cells, but they have significant differences in their structures. An animal cell is generally smaller than a plant cell. As opposed to a plant cell, an animal cell varies in size is irregular in shape. An animal cell does not have a large vacuole o..

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