Limestone is easily dissolvable by water and often a small steam or even river and carve away at the stone and create caverns or caves
<em>Both the Acanthostega and the Icythyostega were animals characterized by having four extremities and be equipped with gills and lungs at the same time, which determines that they are called tetrapods similar to fish.
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<em>Their characteristics made them suitable for living in aquatic and terrestrial environments, so they probably inhabited shallow waters or even the surface of the earth.</em>
The acid is H2Se, the base is H2O, the conjugate acid is H3O+, the conjugate base is SeH–.
The reaction equation is as follows;
H2Se + H2O → SeH– + H3O+
The acid is the specie that donates a proton while the base is the specie that <em>accepts</em> the proton.
The specie formed from the acid after it donates a proton is called the conjugate base while the specie formed from the base after accepting a proton from the acid is called the conjugate acid.
From the reaction equation, we can see that the acid is H2Se, the base is H2O. The conjugate acid is H3O+ while the conjugate base is SeH– .
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The continental places around the Pacific Ocean have lot of volcanic activity.
Explanation:
The Pacific plate is an oceanic plate. It borders several continental plates. On all sides, the Pacific plate is subducting below the other plates. The subduction zones have resulted in intense geological activity along the boundaries, which are right next to the continental edges. Along the sides of the continents that are having a boundary with the Pacific plate there are lot of volcanoes and earthquakes.
- The boundary between the Pacific plate and the other plates around it makes up the Ring of Fire.
- The Ring of Fire stretches mostly on the edges of the continents, surrounding the Pacific Ocean, and it is the place where most of the volcanoes on Earth are located.
- The formation of volcanoes has influenced the topography of the edges of the continents, and all of them are mountainous along the coastlines.
- All of the volcanic activity and the subduction result in cracking of the crust and adjustment of it, resulting in release of lot of energy, or as we know it - earthquakes.
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Answer:
<h2>b) 640,000</h2>
Explanation:
Given:
Initial population = 10,000
Doubling time= 20 minutes
total culture allowed time = 2 hours
after 2 hours final bacterial population is 640,000
calculation:
10,000 doubles after 20 minutes = 20,000 and so on... final population after 2 hours = 640,000.
