a volcano is a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
There are three main types of volcano - composite or strato,shield and dome. Composite volcanoes, sometimes known as strato volcanoes, are steep sided cones formed from layers of ash and [lava] flows. The eruptions from these volcanoes may be a pyroclastic flow rather than a flow of lava.
Answer:
Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent.
Explanation:
Explanation:
Eukaryotic cell
Eukaryotic cells have DNA, and prokaryotic cells do not.
Eukaryotic cells have both membrane-bound organelles and nuclei, while prokaryotic cells have neither
Prokaryotic cell
Prokaryotic cells have membrane-bound organelles, and eukaryotic cells do not.
Prokaryotic cells have nuclus and eukaryotic cells do not.
