Answer:
a) are the sources of long-period comets.
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Oxygen causes the chemical weathering of a rock containing iron to become soft and crumbly and reddish brown in color.
<h3>What is the role of oxygen in rock weathering?</h3>
Oxygen is said to be a very reactive element and this often makes it reacts with rocks and this often leads to rust formation and others.
Therefore, Oxygen causes the chemical weathering of a rock containing iron to become soft and crumbly and reddish brown in color.
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The area was once a forest.
The area was uplifted.
The area was buried in sediment.
The area was probably covered by water.
Petrification of a dead plant or animal organisms occurs when rock mineral displaces the organic elements in the structure of the biotic matter or these minerals seep in between the spaces and pores within the dead plant or organism and become part of the material.
Explanation:
Petrification occurs under high pressure. This is why this process occurs in the crust after layers of sediments create enough pressure on the dead organic matter buried in with the sediments. This phenomenon commonly begins on the ocean floor where dead marine life sinks to the bottom and is buried by sediments over many years.
Occasionally, tectonic plate forces uplift these petrified fossils from deep in the crust exposing them on the surface like in this case.
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Answer:
Glaciers act as reservoirs of water that persist through summer. Continual melt from glaciers contributes water to the ecosystem throughout dry months, creating perennial stream habitat and a water source for plants and animals. The cold runoff from glaciers also affects downstream water temperatures. Many aquatic species in mountainous environments require cold water temperatures to survive. Some aquatic insects--fundamental components of the food web--are especially sensitive to stream temperature and cannot survive without the cooling effects of glacial melt water. Such changes in stream habitat may also adversely impact native trout and other keystone salmon species.
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