Topics in GeographyBranches of Geography: Physical and Environmental Geography Geography Scheme of Work, SS1, First Term Geography Scheme of Work, SS1, Second Term Geography Scheme of Work, SS1, Third Term Classification | Types of Planets and their Characteristics Planets of the Solar System with their Characteristics Functions of the Atmosphere Layers of the Atmosphere Solar System in Geography Atmosphere: Composition of the Atmosphere Geography, Types and Branches of Geography Characteristics and Examples of Igneous, Sedimentary and Metamorphic Rocks
Academic Questions in Geography
Sedimentary rocks are formed from the following processes EXCEPT _____.
A. By the transformation of a protolith
B. By the transportation and subsequent deposition of weathered remains of pre-existing rocks
C. By the accumulation and lithification of detrital rocks
D. By their precipitation from solution
E. By processes resulting from biogenic activity
F. All of the above
The following are examples of igneous rock EXCEPT _____.
LEN ACADEMY SMART SCHOOL SOFTWARE
Click here to watch the video
For a free trial, click here. Recommend to a school and get 25% commission for 6 academic terms
The atmosphere of the earth serves the following important functions:
1. Photosynthesis occurs from the presence of carbon(IV)oxide (CO2) in the atmosphere. Without carbon (IV)oxide, green plants will not be able to manufacture food.
2. Life is present on earth due to the presence of oxygen (O2) in the atmosphere. Oxygen is an essential element in aerobic respiration. (Aerobic means presence of oxygen).
3. The ozone layer of the atmosphere helps in trapping ultraviolet radiation thereby preventing it from reaching the earth.
The part of the atmosphere containing ozone (O3) is referred to as the ozone layer.
Note: In space, an astronaut will burn his or her skin if it's exposed outside the spacesuit.
4. The atmosphere is an important reservoir of water, hence making it an important factor in water cycle. This makes the atmosphere a pathway for rainfall.
5. The atmosphere of the earth acts as a "cloak" that aid in keeping earth's temperature moderately warm through its natural greenhouse gases like water vapour and ozone.
The greenhouse gases (water vapour and ozone) act by trapping the sun's heat directed towards the surface of the earth. It also prevents the sun's heat from escaping back into space. This process keeps the surface of the earth at a moderately warm temperature which is crucial for life.
Note: Some of the planets in the solar system are scorching hot while others are unpleasantly cold. This results from a lack of greenhouse gases in these planets.
Ironically, the various activities of humans like combustion and burning are constantly adding more greenhouse gases into the atmosphere; and this generally has a negative effect on humans and animals alike.
Examples of greenhouse gases added by humans into the atmosphere include methane and carbon(IV)oxide.
The effect of excess greenhouse gases in the atmosphere will result in an increased temperature on the surface of the earth. The term global warming is associated with earth's temperature which is constantly on the rise.
6. The atmosphere has proven to be effective in the transmission of radio waves which is important in global communication.
7. The atmospheric pressure is vital for the boiling processes to occur. This implies that water boils as a result of of the atmosphere.
Boiling is the defined as the process whereby the vapour pressure of a liquid equals the atmospheric pressure.
8. The atmosphere provides a source of livelihood for climatologists, meteorologist and commercial aircraft workers.
9. Weather and climate are present on earth as a result of its atmosphere.
Note: As a student, it is important you comprehend how the above functions (of the atmosphere) support life.
Earth's atmosphere is extremely important for the survival of all its inhabitants.
The explanations below give credence to this fact.
When one moves further away from earth, the atmosphere becomes thinner until it disappears into the outer space. There is no atmosphere in space. For this reason, astronauts will always wear a spacesuit while carrying along their oxygen gas masks and canisters when in space.
People living on very high altitudes will likely experience a reduced amount of oxygen in the atmosphere. Such people survive because their bodily organs become adapted to survive in such conditions.
On mountain Everest for instance, mountain climbers will need to carry oxygen canisters because lesser amount of oxygen is present on this mountain.
Note: The atmospheric composition of oxygen on the moon and other planets are quite different from that of the earth. Usually, they have lesser percentage of oxygen or even no oxygen at all, thus making life incompatible on them. (Some may not even have an atmosphere to begin with). This gives a reason why earth is clearly the only planet compartible with life.
The only process in nature that actively enriches our atmosphere with oxygen is photosynthesis. Every other process like respiration, burning and combustion takes away oxygen from it. In addition, they introduce carbon(IV)oxide (CO2) into the atmosphere.
Note: Photosynthesis is also the only process that takes away carbon(IV)oxide (CO2) from the atmosphere.
Photosynthesis is the process by which green plants manufacture food by utilizing carbon(IV)oxide and water in the presence of sunlight.
Oxygen is given off as a by-product of photosynthesis. In regards to this, it is recommended that each person plants a tree.
Potentially dangerous ultraviolet radiation coming from the space is hindered by the atmosphere (through the ozone layer) from reaching the surface of the earth and that’s a good thing. This is because ultraviolet radiation is harmful to living organisms. On the other hand, the atmosphere allows the sun’s rays to reach the earth, while also preventing it from leaving the earth back into the outer space.
One fact concerning life is:
The sun is the ultimate source of energy.
Without the sun’s rays on earth, life will be non-existent.
The above facts are is in support of the 1st Law of Thermodynamics with regards to food chain.
THANKS FOR READING - Please Help Share!
Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.
CONTRIBUTE TO THIS TOPIC | ASK A QUESTION
Amazing facts in Geography
Earth is the only planet that contains water on it's surface. In fact, the percentage of water on Earth is greater than that of land.
Salt water or Saline water makes up about 97% of Earth's water. It comprises majorly of ocean and sea waters
Metal actually rains on planet Venus
Planet Mars appear brownish/red because it's covered with iron rust.
China is the largest emitter of carbon IV oxide (CO2) in our world today
There are over 125 billion galaxies in our universe. Our galaxy (called the milky way) has about 100-400 billion stars.
The 🌞 sun is actually a 🌟 star; and a single star can be 100 times bigger than the earth.
It is estimated that 50% of all gold ever mined on Earth came from South Africa.
Infact, it came from a single plateau in South Africa called Witwatersrand
We have 7 continents. All the 7 continents ends with the alphabet that began it.
The continents are:
- North America
- South America
Instabul is a city in Turkey. It's the only city that lies between two continents. Instabul lies between Europe and Asia
It is believed that the Amazon rainforest is responsible for producing about 20% of earth's oxygen.
Please read on tropical rainforest here.
NOTABLE POINTS IN Geography