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What are some native rainforest plants?

Bromeliads have thick, waxy leaves that fan out in a circle, creating a bowl in the center that catches rainwater. Each miniature pool is home to rainforest creatures such as salamanders, snails and tadpoles. The animals hatch, grow and start the next generation, all in their own mini ecosystems.\nEpiphytes are air plants that attach themselves to tree trunks and branches high in the forest canopy. While they depend on the trees for anchorage, epiphytes are not parasites. They pull their nutrients and water from the humid moist air. Epiphyte seeds are transported through the forest by the wind..

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How many ounces can the human stomach hold?

The stomach holds food for between one and two hours. During that time, secretions and hormones from the stomach, liver, pancreas, gallbladder and intestines help digest the food.\nPeople who undergo some forms of bariatric or weight loss surgery have the amount of food their stomachs can hold drastically reduced. This causes the stomach to feel full more quickly, thus cutting down on how much the patient eats.

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How do you find the density of an object?

Calculate the volume of the objectIn order to calculate the volume of the object, first measure the necessary dimensions of the object that are required for its volume calculation. For instance, if the object is cubical shaped, measure the three sides of the cube. If the object is spherical, measure its diameter. Use appropriate tools to take these readings, and note them down along with their unit. Take all readings in the same unit, and then use these values in appropriate equations to calculate the volume of the object.Measure the massCarefully weigh the object using a balance, and note its..

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When was the moon first discovered?

Even the dinosaurs used the moon in order to hunt. The moon has played a large part in the lives of humanity as a source of light in the night and ancient people have tried to understand the role of the moon in the grand scheme of things. Scientists today are still learning things about the moon, so it is possible new discoveries will be made.

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What does a positive Tollens' test mean?

Wikipedia explains that the Tollens' test is also called the silver-mirror test in reference to what occurs when it is positive. Aldehydes cause the elemental silver to precipitate from the solution. Often, the silver covers the sides of the test tube, creating a highly reflective, mirror-like coating on the inside of the test tube. There is one exception to the Tollens' test. If the reagent is placed in a solution containing alpha-hydroxy ketones, mirror-like particles are formed.\nWikipedia explains that the reagent used in the Tollens' test is not produced commercially becaus..

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How do you explain the Big Bang Theory to kids?

Describe to children that scientists believe the entire universe was contained inside a very hot bubble much smaller than the tip of a needle, so they can imagine how the universe must have been ready to burst out of that extremely tiny and hot space at any given moment. Once this bubble exploded, its contents were able to space far apart and begin to cool down.\nDuring the cooling process, the energy of the explosion began to form into matter, eventually forming into protons and neutrons. Once the temperature cooled to 1 billion degrees Celsius, the protons and neutrons were able to come clos..

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What is the cellular basis of life?

Cells were discovered in the late 1600s by scientist Robert Hook. In the 1830s, German scientists Theodor Schwann and Mathias Schleiden figured out that all living things were made of cells. Around the same time, German pathologist Rudolph Virchow came to the conclusion that cells can only come from other cells. These are the important discoveries that brought the cell theory into existence.

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Where does oak come from?

Humans have used oak wood for thousands of years. The wood is prized for its strength, hardness and resistance to insect damage and rot. It is used in shipbuilding, furniture making and flooring. Oak wood is also used to make sports equipment, musical instruments and barrels to hold wines and other liquors.\nThere are over 400 species of oak. Oak trees can be either deciduous or evergreen, and given advantageous environmental conditions, most can live for hundreds of years.\nAmong the more popular species of oak is the White Oak, which can be found from Canada down to the Gulf of Mexico and Te..

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What are some facts about energy?

The first law of thermodynamics is the principle of conservation of energy. The law states that the total amount of energy in the universe is constant. Energy can transform from one form to another, but transformation does not create or destroy energy.\nThe second law of thermodynamics is the principle of entropy. Each time energy transfers, some energy transforms to an unusable form as the energy moves away from its source. This increases the total disorder of a closed system. Entropy measures the amount of unusable energy in the system.\nThe third law of thermodynamics states that at absolut..

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How do water generators work?

Most hydroelectric power plants make use of a dam to hold back the water before releasing it, giving it high potential energy. The dam is usually built on a large river to raise the level of the water and to control the flow. When the dam's gates are opened, water builds pressure as it flows down a pipeline leading to the turbine. The kinetic energy in the water converts into mechanical energy when the water strikes the turbine's blades with force, causing it to rotate.\nAs the turbine rotates, so do some giant magnets inside the generator. The mechanical energy from the previous sta..

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