This is an encyclopedia entry for the term "groundwater." Groundwater is all …
This is an encyclopedia entry for the term "groundwater." Groundwater is all the water found underneath the Earth?s surface. Text for this entry is appropriate for the middle and high school grade levels.
This is an encyclopedia entry for "habitat." A habitat is a place …
This is an encyclopedia entry for "habitat." A habitat is a place where an organism makes its home. Text for this entry is appropriate for middle and high school levels.
This is an encyclopedia entry for the term "herbivore." An herbivore is …
This is an encyclopedia entry for the term "herbivore." An herbivore is an organism that mostly feeds on plants. Text for this entry is appropriate for the upper elementary, middle, and high school grade levels.
This is an encyclopedia entry for "keystone species," a plant or animal …
This is an encyclopedia entry for "keystone species," a plant or animal that plays a unique and crucial role in the way an ecosystem functions. Text for this entry is appropriate for the middle and high school grade levels.
This is an encyclopedia entry for the term "mantle." The mantle is …
This is an encyclopedia entry for the term "mantle." The mantle is one of the three main layers of the Earth. Text for this entry is appropriate for the middle and high school grade levels. An accompanying image set provides graphics to add to a lecture on the layers of the Earth.
This is an encyclopedia entry for the term "marine sanctuary." A marine …
This is an encyclopedia entry for the term "marine sanctuary." A marine sanctuary is a general type of marine protected area (MPA). The Flower Garden Banks National Marine Sanctuary and the Pelagos Sanctuary for Mediterranean Marine Animals are featured. Text for this entry is appropriate for the middle and high school levels.
This is an encyclopedia entry for "marsh." A marsh is a wetland, …
This is an encyclopedia entry for "marsh." A marsh is a wetland, an area of land where water covers ground for long periods of time. Text is appropriate for middle and high grade levels.
This is a comprehensive encyclopedia entry that contains information about marine ecosystems, …
This is a comprehensive encyclopedia entry that contains information about marine ecosystems, ocean zones, ocean currents, marine resources, and environmental issues associated with oceans. Text for this entry is appropriate for the middle and high school grade levels.
This is an encyclopedia entry for the term "omnivore." An omnivore is …
This is an encyclopedia entry for the term "omnivore." An omnivore is an organism that regularly consumes a variety of material, including plants, animals, algae, and fungi. Text for this entry is appropriate for upper elementary, middle, and high school grade levels.
This encyclopedia entry is for the term "ozone layer." The ozone layer …
This encyclopedia entry is for the term "ozone layer." The ozone layer is one layer of the stratosphere, the second layer of the Earth?s atmosphere. The stratosphere is the mass of protective gases clinging to our planet. This entry discusses what the ozone layer does for us and how we are impacting the layer. Text for this entry is appropriate for the middle and high school grade levels.
This encyclopedia entry is for the term "precipitation." Precipitation is any type …
This encyclopedia entry is for the term "precipitation." Precipitation is any type of water that forms in the Earth's atmosphere and then drops onto the surface of the Earth. Water vapor, droplets of water suspended in the air, builds up in the Earth's atmosphere. Text for this entry is appropriate for the middle and high school grade levels.
This is an encyclopedia entry for the term "rain." Rain is liquid …
This is an encyclopedia entry for the term "rain." Rain is liquid precipitation: water falling from the sky. Raindrops fall to Earth when clouds become saturated, or filled, with water droplets. Text for this entry is appropriate for the middle and high school grade levels.
This is an encyclopedic entry for the term "silt." Silt is a …
This is an encyclopedic entry for the term "silt." Silt is a solid, dust-like sediment that water, ice, and wind transport and deposit. Silt is made up of rock and mineral particles that are larger than clay but smaller than sand. Text for this entry is appropriate for the middle and high school grade levels.
This is an encyclopedia entry for the term "swamp," described as an …
This is an encyclopedia entry for the term "swamp," described as an area of land permanently saturated, or filled, with water. Text for this entry is appropriate for the middle and high school grade levels.
This is an encyclopedia entry for the term "taiga." The taiga is …
This is an encyclopedia entry for the term "taiga." The taiga is a forest of the cold, subarctic region. The subarctic is an area of the Northern Hemisphere that lies just south of the Arctic Circle. Text for this entry is appropriate for the middle and high school grade levels.
This encyclopedia entry is for the term "tide." The regular rise and …
This encyclopedia entry is for the term "tide." The regular rise and fall of the ocean?s waters are known as tides. Along coasts, the water slowly rises up over the shore and then slowly falls back again. Text for this entry is appropriate for the middle and high school grade levels.
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