Science

A:

Sandstone forms over the course of centuries, as deposits of sand accumulate in rivers, lakes or on the ocean floor, and the sand blends with calcite or quarts and then undergoes compression. After enough time goes by, the pressure pushes all of these elements together to create sandstone. Because not all sand is identical but instead comes in a variety of colors and grain textures, each formation has a unique appearance.

See Full Answer
Filed Under:
    • What is the sky made of?

      Q: What is the sky made of?

      A: Four layers of the earth's atmosphere containing various gases make up the composition of the sky. The layers of the atmosphere are divided into the troposphere, the stratosphere, the mesosphere and the thermosphere. The atmosphere's divisions occur according to temperature fluctuations.
      See Full Answer
      Filed Under:
    • What is a constellation?

      Q: What is a constellation?

      A: The general English definition of constellation is a group or configuration of objects, characteristics, ideas, feelings, etc, as in "a constellation of qualities." The noun constellation is used in astronomy, astrology and general English.
      See Full Answer
      Filed Under:
    • What is the circle of illumination?

      Q: What is the circle of illumination?

      A: The circle of illumination is the line that separates the Earth to create equal parts of day and night. It passes through the poles and allows the entire Earth to have an equal amount of time spent during the daylight and nighttime hours.
      See Full Answer
      Filed Under:
    • How did Galileo impact the world?

      Q: How did Galileo impact the world?

      A: Galileo's main impact on the world was his improvement upon the telescope and being the first to use it in the science of astronomy. He also supported the Copernican system that stated that planets orbit the sun rather than the Earth as the Catholic Church said at the time. His other contribution was to contradict Aristotle's teachings that heavier objects fall faster than lighter ones.
      See Full Answer
      Filed Under:
    • Why do stars pulsate?

      Q: Why do stars pulsate?

      A: Stars appear to pulsate and twinkle in the night sky due to the refraction of light through the Earth's atmosphere. When the light from a star enters the atmosphere, air molecules bounce and deflect the light rays, slightly altering the apparent position and intensity of the star.
      See Full Answer
      Filed Under:
    • What are meteorites made of?

      Q: What are meteorites made of?

      A: The meteorites that land on earth can be made of stone, iron or stony iron. A few meteorites are made of volcanic glass, but scientists aren't sure that all of these meteorites are extraterrestrial in nature. They believe some of these meteorites are formed when material from an impact crater liquefies and then turns to glass as it's ejected into the atmosphere.
      See Full Answer
      Filed Under:
    • See More Astronomy Questions
    • What is the role of producers in an ecosystem?

      Q: What is the role of producers in an ecosystem?

      A: Producers are able to make their own food and do not rely on the ecosystem for nourishment. Examples of producers include photosynthetic microbes and plants.
      See Full Answer
      Filed Under:
    • Why are decomposers important?

      Q: Why are decomposers important?

      A: Decomposers are important because they are crucial for the proper functioning of ecosystems. They recycle the minerals found in dead plants and animals back into the food chain. Ecosystems do not waste energy or materials, and as such, the decomposers capitalize on any remaining energy in a dead organism and make the minerals available to the entire biome.
      See Full Answer
      Filed Under:
    • What is the difference between diffusion and osmosis?

      Q: What is the difference between diffusion and osmosis?

      A: Osmosis is a particular type of diffusion in which water crosses a semi-permeable membrane to an area with a greater solute concentration, whereas standard diffusion often allows the free movement of both solutes and solvent toward equilibrium. Diffusion in general is the net movement of molecules in solution from areas of higher concentration to areas of lower concentration. Osmotic pressure is potentially very powerful, with osmotic pressure being the only force necessary to move water from the roots to the tops of the tallest trees in the world.
      See Full Answer
      Filed Under:
    • What are some characteristics of a Volvox?

      Q: What are some characteristics of a Volvox?

      A: Characteristics of a Volvox include the fact that each cell contains two flagella, which aids in movement through water, and the colonies reproduce asexually. The cells of a Volvox are held together by protoplasm strands.
      See Full Answer
      Filed Under:
    • What is the main artery in your body?

      Q: What is the main artery in your body?

      A: According to WebMD, the main artery in the body is the aorta. It is connected to the left ventricle of the heart. The aorta branches off into a web of numerous smaller arteries that exist all over the body.
      See Full Answer
      Filed Under:
    • How do multicellular organisms grow?

      Q: How do multicellular organisms grow?

      A: Multicellular organisms may evolve into large and complex beings, but they all begin as a single cell and pass through several defined stages of development. All beings, from small plants and insects to large elephants, giraffes and even humans, begin as single, simple cells, called fertilized eggs.
      See Full Answer
      Filed Under:
    • See More Biology Questions
    • What family does titanium belong to?

      Q: What family does titanium belong to?

      A: Titanium belongs to group 4 and is a transition metal. Discovered in 1791 by William Gregor, its atomic number is 22. Shiny and dark gray in color, this metal is the ninth most common element in the earth's crust.
      See Full Answer
      Filed Under:
    • How are colloids classified?

      Q: How are colloids classified?

      A: Colloids are generally classified into four types: emulsion, sol, aerosol and foam. The combination of fog and smoke makes up an aerosol, which is comprised of solid particles or liquid droplets dispersed throughout a gas phase. Mayonnaise is an emulsion, which are two liquids dispersed together.
      See Full Answer
      Filed Under:
    • What is sodium used for?

      Q: What is sodium used for?

      A: Sodium is used to create industrial and manufacturing compounds and is also a common additive in salts, baking soda and baking powder. Sodium is unique in that it is a mineral with nutritional and economic benefits. Sodium is essential for humans and other organisms and is also a key ingredient in many compounds, such as sodium compounds.
      See Full Answer
      Filed Under:
    • What is the use of chloroxylenol in Dettol antiseptic liquid?

      Q: What is the use of chloroxylenol in Dettol antiseptic liquid?

      A: The chloroxylenol in Dettol is an antimicrobial disinfectant used to kill bacteria and to prevent infections on minor scrapes, cuts or burns. The substance is commonly found in antibacterial soaps, but it is also used to control bacteria, algae and fungi on industrial surfaces where clean facilities are needed. Some liquids that contain chloroxylenol must be diluted before application on the human body.
      See Full Answer
      Filed Under:
    • What is gas made of?

      Q: What is gas made of?

      A: Gas comes from crude oil. The remains of organisms that lived on Earth hundreds of millions of years ago were eventually covered with sediment and rock. The pressure and heat of the Earth caused the remains and sediment to combine and create liquid hydrocarbon, or crude oil.
      See Full Answer
      Filed Under:
    • Why do elements tend to form compounds?

      Q: Why do elements tend to form compounds?

      A: The fact that some elements are more atomically stable than others accounts for their tendency to form compounds. This atomic stability is basically the amount of electrons an atom holds in its outer shell. When the outer shell is completely full, an atom is more stable than when the outer shell is only half full.
      See Full Answer
      Filed Under:
    • See More Chemistry Questions