The reason why the large-scale convection currents occur in the atmosphere is because Earth's rotation causes air at the equator to move much faster than air at the poles.
<h3>What is convection?</h3>
This can be defined to mean the circular motion that air is made to pass through.
This causes warmer air with faster molecules to be dense as the cooler air gets to the atmosphere.
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The mississippi river is a physical feature as it was discovered during a time where man weren`t capable of such construction in the earth.
Answer:
Volume = 113.04 cubic units
Explanation:
Given:
Radius (r) = 2 units
Height (h) = 9 units
π = 3.14
Required:
Volume of the cylinder
Solution:
Volume = πr²h
Plug in the values
Volume = 3.14*2²*9
Volume = 3.14*4*9
Volume = 113.04 cubic units
Answer:
animal wastes and fertilizers
Explanation:
The majority of the nitrates that are polluting the rivers come from the animal wastes and from the fertilizers used in the agriculture. The increased amounts of nitrates in the rivers causes eutrophication. This basically means that the water is becoming over-saturated with nutrients. This leads to the spreading out of the algae. As the algae spread out more and more, they cover the surface part of the water, so large portions of the rivers do not receive sunlight, which kills of the organisms that use photosynthesis. Further, the algae reduce the amount of oxygen in the water, often resulting in dying out of the fishes. It is a chain reaction that leads from one thing to another and the end result is devastating.
Multicellular organisms e.g. man meet their needs through use of specialized systems that they have in their bodies. Examples of such include:
1. cardiovascular system composed of heart, veins and arteries which facilitate transport of nutrients to all parts of the body .
2. Skeletal system composed of bones, joints, ligaments and cartilage whose function is support and protection of the body.
3. Digestive system composed of mouth, esophagus, stomach , small and large intestines whose function is breakdown of food and absorption of nutrients.
