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How high does the earth's atmosphere extend?

Above the troposphere, the stratosphere extends 19 more miles up, to a total height of 30 miles. The stratosphere contains the ozone layer, which keeps a lot of the ultraviolet rays from the sun from reaching the surface. Then comes the mesosphere, which is the layer in which most meteors burn up. The highest layer is the ionosphere, so thin that it offers scant protection when compared to outer space. Many satellites and the International Space Station orbit inside the ionosphere.

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What is a mother of millions plant?

Mother-of-millions plants are capable of rapid reproduction, producing hundreds of plantlets in a short amount of time. They can thrive in harsh desert conditions with minimal water, allowing them to spread with little resistance during droughts.\nMother-of-millions plants are typically 12 to 40 inches in height, with pinkish-brown or gray stems. Each stem produces pointed, pale green or brown leaves. The tips of the leaves sprout projections that can grow new plants when they break off. The flowers of the plant grow from a single protruding stem. These flowers are commonly orange or red, and ..

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What is the difference between conduction and convection?

While both conduction and convection are means of transferring heat, the important difference is the medium through which the heat travels. Conduction occurs when heat is transferred through solid objects, like a bar. For example, if a metal rod is held above a fire, the heat eventually travels the length of the rod, making it difficult to hold. The heat then transfers to the person or apparatus holding the rod. On the other hand, convection is the method of heat transferred through liquid or gasses, such as water or air. Heat transfer using convection is used in the oven in the kitchen, using..

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At what temperature does gasoline freeze?

Unlike many other liquids, gasoline is made up of different molecules that slow down as the temperature drops. If it gets cold enough, gas can become quite hard, and hydrocarbons can crystallize if the gas cools slowly.\nThe alcohol components of gasoline might freeze first, whereas some hydrocarbons freeze only at extremely low temperatures, below the temperature of dry ice. Because these different elements are mixed together in gasoline, the temperature at which the liquid begins to freeze varies.

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What is the function of rhizomes?

Many types of plants, including lilies, crabgrass, iris and ginger propagate by means of rhizomes. The rhizome of the ginger plant is the root that cooks use as a spice. Some rhizome tissue stores starches, as in the case of true arrowroot. In ferns and water lilies, the rhizome is the only stem the plant forms.\nGardeners often use rhizomes known as rootstock in the propagation of plants, such as asparagus, lily of the valley and cannas as well as some orchids, through vegetative reproduction. Rhizome propagation is a form of asexual reproduction, with the resulting plant being genetically id..

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Why are nutrient cycles important?

During the carbon cycle, plants remove carbon dioxide from the atmosphere to perform photosynthesis. Animals consume plants and return carbon dioxide to the atmosphere during respiration. Decomposers and detritivores also help to recycle carbon dioxide when they break down dead organic matter and release the gas into the atmosphere.\nIn the nitrogen cycle, nitrogen-fixing bacteria convert atmospheric nitrogen into ammonia in water and soil. Nitrifying bacteria use ammonia, turning it into nitrate and nitrite by-products. These bacteria are essential to ecosystems because they bring nitrogen in..

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How big is a 1:18 scale car?

According to Mint Models, the 1:18 scale car is highly detailed, compared to smaller scaled versions. The large size of the models is directed more toward adult collectors or modelers, rather than children, and they are sold primarily in North America. The 1:18 scale models are also referred to as two-third-inch scale models because each foot of car space is scaled down to two-thirds of an inch of model space.

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Are holly bush berries poisonous to humans?

Authorities differ as to the cause of the nausea and vomiting that holly berries can cause. Some pin the blame on theobromine, an alkaloid found in smaller amounts in chocolate, and others on ilicin. The caffeine in the plant is also toxic to humans if they ingest it in large quantities. Interestingly, despite their toxicity to humans and some animals, the berries are an important source of food for rodents and birds.

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Where do plants grow best?

Some plants thrive in low light, while others require as much direct sun as possible to thrive. Proper plant care varies so much that some plants, such as Tillandsia air plants, don't even need to be potted in soil in order to survive.\nDetermining ideal growing conditions for a plant should be done on a case-by-case basis. Plant owners should carefully research the exact name of their vegetative pets in order to find out exactly how to provide proper care. Everything from potting medium, potting container, light requirements, water requirements, temperature range and nutrient needs shoul..

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At what temperature does water boil at the top of Mount Everest?

Mount Everest is located in southern Asia and has an elevation of about 29,028 feet, but the exact height is disputed among some countries. The Dead Sea is a little over 1300 feet below sea level, making the boiling point of water increase to about 215 degrees. Dissolving a solid substance, such as salt, in water increases the boiling point by a few degrees.

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