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Earth Sciences

Earth Sciences is the study of the Earth in terms of Geography, Geology, Geophysics, etc. It combines the use of Sciences such as Biology, Chemistry, Physics and Mathematics to understand the Earth System.

34,763 Questions

What extends to 85 km above earths surface?

The exosphere is the outermost layer of Earth's atmosphere, extending up to 10,000 km above the surface. It is a very thin layer where the atmosphere transitions into space.

How does the earth control water?

The Earth controls water through various natural processes such as the water cycle, which involves evaporation, condensation, and precipitation. Additionally, the Earth's topography, such as mountains and valleys, can influence the flow of water through rivers and streams. Gravity also plays a role in guiding water movement on Earth's surface.

What is the name of gaseous sphere surrounding earth?

The gaseous sphere surrounding Earth is called the atmosphere. It is composed of different layers of gases that help regulate temperature, protect against harmful radiation, and support life on our planet.

Why air pollutants produced by forest fires in another country can travel all the way to Singapore?

The air pollutants rise high in the atmosphere where the winds are very active. These high-speed winds in the upper atmosphere is what allows pollutants to travel and spread our through out the world. Even though the winds at ground level seem still, high in the atmosphere they're vigorous and aggressive.

Why is the geosphere layered?

The geosphere is layered due to the differentiation process during Earth's formation. Heavier materials sank towards the center to form the core, while lighter materials rose to the surface to form the crust. This process led to the formation of distinct layers within the geosphere such as the core, mantle, and crust.

How the biosphere and the lithosphere interact with one another through the hydrosphere?

The biosphere and lithosphere interact through the hydrosphere in various ways. For example, water in the hydrosphere provides a critical medium for life to exist in the biosphere and plays a role in shaping the lithosphere through erosion and sedimentation processes. Additionally, the nutrients and minerals that are essential for life in the biosphere often come from the lithosphere and are cycled through the hydrosphere.

Who did scientists discover s and p waves?

Scientists discovered S and P waves through the study of earthquake waves. S waves (secondary waves) are slower and travel through solids only, while P waves (primary waves) are faster and travel through solids, liquids, and gases. These waves are used to determine the internal structure of the Earth's layers and to locate the epicenter of an earthquake.

What are reference points on the earths surface?

We have several reference points on the Earth's surface, for our convenience. The North and South Poles are a couple. The choice of Greenwich as the zero longitude, and of the International Date Line are another two. These points have no specific feature on the surface, they are decided on for the convenience of the users.

What does qualitative observation men?

A qualitative or subjective observation is an observation which uses evidence gathered from one of the five senses i.e. color, texture, taste, etc as opposed to a quantitative or objective observation which describes something using numbers.

Examples of qualitative observations:

"The coat is green."

"The dog is soft."

"The coffee is bitter."

Examples of quantitative observations:

"There are 4 computers in the classroom."

"There are 7 cookies in the jar."

"There are 5 stripes on her dress."

What are the 4 major systems on earth?

The four major systems on Earth are the atmosphere (air), hydrosphere (water), lithosphere (land), and biosphere (living organisms). These systems interact and influence each other to maintain the balance of life on Earth.

How do glacial deposits support continental drift?

Glacial deposits help support the theory of continental drift by showing that ice sheets existed in areas that are now far from the Earth's poles. These deposits indicate that the continents were once connected in a single supercontinent, supporting the idea that they have since moved to their current positions over time.

How do faults affect Earth's surface?

Faults are fractures in the Earth's crust where rocks on either side have moved relative to each other. When this movement occurs, it can cause earthquakes, as the stress built up from the shifting rocks is released suddenly. Additionally, faults can create topographical features such as mountains, valleys, and plateaus due to the uplift or subsidence of the land along the fault line.

How do women get thick?

Women can build muscle mass and increase overall body thickness through strength training exercises such as weightlifting and resistance training. Consuming a balanced diet that includes adequate protein and calories to support muscle growth is also important. Additionally, incorporating compound movements and progressive overload training techniques can help in achieving a thicker physique.

What part of Earth's mantle is near the outer core?

The Earth comprises:-

  1. Continental crust: depth of 0-75 kilometres: Oceanic crust: depth of 0-10 kilometres
  2. Upper mantle: depth of 10-400 kilometres
  3. Transition region: depth of 400-650 kilometres
  4. Lower mantle: depth of 650-2,890 kilometres
  5. D" layer: depth of 2,700-2,890 kilometres
  6. Outer core: depth of 2,890-5,150 kilometres
  7. Inner core: depth of 5,150-6,370 kilometres

What is earth's inclination and climatic zone of the earth?

Earth's inclination is approximately 23.5 degrees. This inclination is responsible for the Earth's seasons. Based on this inclination, the Earth is divided into different climatic zones: tropical, temperate, and polar zones.

How far down have humans drilled Into the earth?

The deepest borehole ever drilled by humans is the Kola Superdeep Borehole in Russia, reaching a depth of approximately 7.5 miles (12 kilometers). This project was started as a scientific endeavor to better understand the Earth's crust and mantle.

What does geosphere?

The geosphere refers to the solid portion of the Earth, including the rocks, minerals, and landforms that make up the planet's crust and upper mantle. It plays a crucial role in supporting life on Earth through processes like nutrient cycling, the formation of soil, and the cycling of water and other substances.

What shows a pie shaped portion of the earth?

A pie-shaped portion of the Earth can be represented using a pie chart or a circular graph. These visual representations can show the relative size or proportion of different categories or data points. By dividing the circle into slices, each slice represents a portion or segment of the whole.

Why were sailors able to use the Earths magnetic field to navigate the seas?

Sailors were and are able to use the Earth's magnetic field to navigate the seas because of the consistency of its orientation. The simple device known as a compass, which is used to indicate the direction of the Earth's magnetic field, contributes to navigational cues by giving an orientation of the ship through the act of comparison to the direction of the Earth's magnetic field, thus yielding useful information about the direction in which the ship sails. Unlike celestial bodies which can also be exploited to provide navigational information, the compass usually operates day or night and regardless of whether the sky is overcast. There are of course nuances in the operation of the compass, such as variation and deviation - allowances for slight local changes in geomagnetic force and differences between true north and magnetic north depending on global position (such as latitude).

How much matter is there in earth?

Elements are defined by their atomic nucleus, the core of the atom, consisting of neutral neutrons and positive protons. The thing that makes two elements different is the number of protons. For example Hydrogen has 1 proton, Oxygen has 8 and Gold has 79. If you have two elements with different numbers of neutrons, they are called isotopes of that element. In principle you can create a new element by smashing together a bunch of protons to create a nucleus, but some combinations are much more stable than others. Therefore the vast, majority of the matter in the universe consists of the first 92 elements of the periodic table (after Uranium, which has 92 protons and is therefore element number 92, they are all radioactive and no higher numbered element occurs naturally on Earth). Most of that matter again consists of Hydrogen with one proton (ca. 75%) and Helium with two (ca. 23%) with all other elements sharing the remaining 2%.

What is called a flat graphical representation of locations on earth?

A map is called a flat graphical representation of locations on Earth. It provides a visual reference of geographical features, boundaries, and distances between places. Maps can be used for navigation, planning, and analysis of spatial data.

How do scientists know the co2 level of earth's past atmosphere?

Ice cores contain gases representative of the atmosphere at the time the original snow fell, and thus are used for exploring ancient atmosphere properties. An upper age of about 800 000 years is the limit at present. The ice core also contains dust and radioactive fallout, and these contaminants serve as precise markers in the core. Very old ice does not preserve the annual climate bands that are such an aid to precise dating. CO2 is one of the embedded gases. [The ratio of the various isotopes of oxygen are a proxy for the temperature of the Earth, for the atmospheric mixing is reasonably quick.]

What is the point from which an azimuth originates?

The azimuth originates at true North
The azimuth originates form the north point. It is a measure of how far an object is form the observer's north point.

What is the difference between a satellite the stars and a planet?

Stars are burning, hot, gaseous (our sun is a 'star') - planets are solids, more or less, like our planet, Earth. Satellites revolve around something else, like the moon is a satellite of Earth, the Earth is a satellite of the sun. The objects we send up to provide telecommunication are called 'satellites' because they revolve around the Earth.