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The correct option is b)21%. The air in Earth's atmosphere is composed of approximately 78% nitrogen and 21% oxygen. Air also contains small amounts of other gases such as carbon dioxide, neon, and hydrogen.

What is the percentage of oxygen in the air?

Solution for the question - what is the percentage of oxygen in the air? 70%78%21%20%

What is the percentage of oxygen in the air?-Turito

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The correct option is c). The Earth looks round from space, but it's actually more of an ellipsoid. But even the ellipsoid cannot adequately explain the Earth's unique and ever-changing shape.

Solution for the question - identify the image of the earth.

Identify the image of the earth.-Turito

The correct option is b)Biosphere. <ul>
<li>The biosphere consists of the parts of the Earth where life exists. The biosphere extends from the deepest root systems of trees through the dark rims of ocean trenches to lush tropical forests and towering mountain peaks.</li>
<li>The biosphere covers all these spheres, as life exists on land, in the air, and in water.</li>
<li>The biosphere is about 20 kilometers (12 miles) from top to bottom, but almost all life exists between about 500 meters (1,640 feet) below sea level and about 6 kilometers (3.75 miles) above sea level.</li>
</ul>

Solution for the question - name the sphere that contains all life. atmospherelithospherebiospherehydrosphere

Name the sphere that contains all life.-Turito

The correct option is a)Part of the Earth, water and atmosphere that occupies living things. <ul>
<li>The biosphere , also known as the ecosphere , is the global sum of all ecosystems. is. It can also be called the realm of life on Earth.</li>
<li>The biosphere is effectively a physically closed system with minimal inputs and outputs.</li>
<li> The biosphere covers all these spheres, as life exists on land, in the air, and in water.</li>
<li>The biosphere is about 20 kilometers from top to bottom, but almost all life exists between about 500 meters below sea level and about 6 kilometers above sea level.</li>
</ul>

Solution for the question - biosphere is_________________. big rocks and water.part of water that contains fishes.some part of soil that contains plants.

Biosphere is_________________.-Turito

The correct option is b)Nickel and iron. The core consists of two layers, the outer core and the inner core, which adjoin the mantle. The boundaries separating these regions are called Bullen discontinuities. About 2,200 kilometers (1,367 miles) thick, the outer core is composed primarily of liquid iron and nickel. The NiFe alloy in the outer core is very hot, 4500-5500 degrees Celsius.

Solution for the question - outer core comprises of __________. none of thesenickel and coppernickel and ironnickel and carbon

Outer core comprises of __________.-Turito

The correct option is c)Biosphere. The biosphere, is the relatively thin layer that supports life on the Earth's surface, extends from a few kilometers in the atmosphere to deep-sea vents in the ocean. The biosphere is the global ecosystem composed of biotic (biofauna) and abiotic (abiotic) factors from which energy and nutrients are derived.

Solution for the question - observe the following image. it belongs to ________. atmospherebiospherehydrospheregeosphere

Observe the following image. it belongs to ________.-Turito

The correct option is c)Land. Land ecosystems play a central role in maintaining the earth's basic life support systems. The air we breathe, the temperatures we can withstand, the water we can drink, the soil that supports the plants we use, and the organisms we live with. Land is very important for humans.

______________ is the main home of human being.

Solution for the question - ______________ is the main home of human being. pondlandskyocean

______________ is the main home of human being.-Turito

The correct option is b)Outer core. The Earth's magnetic field is primarily caused by electrical currents in the liquid outer core. The Earth's core is hotter than the Curie point temperature of 1043 K, above which the iron spins become randomly oriented. Such randomization causes the material to lose its magnetization.

Earth’s magnetic field is developed in _____.

Solution for the question - earths magnetic field is developed in _____. mantleinner coreouter corecrust

Earths magnetic field is developed in _____.-Turito

The correct option is b)Outer planet. <ul>
<li>The outer planets are larger than the inner planets.</li>
<li>Our solar system has her four outer planets: Jupiter, Saturn, Uranus and Neptune.</li>
<li>Jupiter is the largest exoplanet and Uranus is the smallest.</li>
<li>All exoplanets have many moons and thin ring systems of dust and rock.</li>
</ul>

Solution for the question - jupiter is a/an __________ hot planetblue planetouter planetinner planet

Jupiter is a/an __________-Turito

The correct option is c)Neptune. <ul>
<li>It consists of a thick soup of water, ammonia and methane over an earth-sized solid core.</li>
<li>Its atmosphere is made up of hydrogen, helium, and methane. </li>
<li>Neptune has six rings, but they are very difficult to see.</li>
<li>Methane in Neptune's upper atmosphere absorbs the sun's red light, but reflects the sun's blue light back into space. This is why Neptune appears blue.</li>
</ul>

Solution for the question - the name of the planet shown in the image is ________. jupiterneptunesaturnmars

The name of the planet shown in the image is ________.-Turito

The correct option is b)Blue. <ul>
<li>The third closest planet to the Sun is Earth. Appearing blue from space, it is called the blue planet because two-thirds of her surface is covered with water.</li>
<li>This means that 71% of the earth is covered with water.</li>
<li>It is the fifth largest planet in terms of size.</li>
<li>It is slightly flattened at the poles. The shape of the earth is defined as a geoid.</li>
<li>Conditions conducive to life are probably found only on Earth.</li>
<li>There is air and water there, which is very important for life.</li>
<li>Air contains life-sustaining gases such as oxygen. From space, it appears blue because of these bodies of water.</li>
</ul>

Solution for the question - earth is called a________ planet. pinkyellowbluegreen

Earth is called a________ planet.-Turito

The correct option is b)Larger than. Because the inner planets were much smaller than the outer planets, they had relatively low gravity and could not draw large amounts of gas into their atmospheres. In the outer regions of the solar system, where temperatures are cooler, other elements such as water and methane did not evaporate, allowing giant planets to form. These planets are more massive than the inner planets, can attract large amounts of hydrogen and helium, and are composed primarily of hydrogen and helium, the most abundant elements in the solar system and the universe.

The outer planets are ________  the inner planets.

Solution for the question - the outer planets are ________ the inner planets. same in color assame aslarger thansmaller than

The outer planets are ________ the inner planets.-Turito

The correct option is b)Pluto. The International Astronomical Union (IAU) has downgraded Pluto's status to dwarf planet status because it does not meet the three criteria the IAU uses to define a full-sized planet. Essentially, Pluto meets all the criteria except one: "It doesn't clear neighboring regions of other bodies."

_________ is a dwarf planet that was once considered a full planet of the Solar System.

Solution for the question - _________ is a dwarf planet that was once considered a full planet of thesolar system. marsuranusplutoneptune

_________ is a dwarf planet that was once considered a full pla-Turito

The correct option is d)Dwarf planet. Dwarf planets are small bodies of planetary mass in direct orbit around the Sun, smaller than any of the eight classical planets, but still worlds of their own. A typical dwarf planet is Pluto. The International Astronomical Union (IAU) has downgraded Pluto's status to dwarf planet status because it does not meet the three criteria the IAU uses to define a full-sized planet.

Solution for the question - pluto is a __________. dwarf planetouter core planetouter core planetinner planet

Pluto is a __________.-Turito

The correct option is c)Saturn. <ul>
<li>Saturn is huge.</li>
<li>It is the second largest planet in our solar system. Jupiter is the only planet larger than this.</li>
<li>You cannot stand on Saturn. It's not like Earth. Saturn is mostly made of gas. It contains a lot of helium. This is the same kind of gas you put in a balloon.</li>
<li>They are made up of ice, dust, and rock masses. The ring is large but thin.</li>
<li>The main ring reaches almost from the Earth to the Moon. However, it is less than 1 km thick.</li>
<li>Other planets have rings. Saturn's rings are the only rings visible from Earth. All you need is a small telescope.</li>
</ul>

Solution for the question - the following image is of_______. uranussaturnmarsmercury

The following image is of_______.-Turito

The correct option is b)Earth. <ul>
<li>Earth is the third planet from the Sun and the only celestial body known to have life.</li>
<li>Although there is a large amount of water throughout the solar system, only Earth has liquid water on its surface.</li>
<li>About 71% of the Earth's surface is made up of oceans, dwarfing the Earth's polar ice caps, lakes and rivers.</li>
</ul>

Name the planet that has life on its surface.

Solution for the question - name the planet that has life on its surface. uranusneptuneearthvenus

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What is the percentage of oxygen in the air?

20%21%78%70%

It the second most abundant gas in the air. There is 78% nitrogen in air.

The correct answer is: 21%

The correct option is b)21%.The air in Earth's atmosphere is composed of approximately 78% nitrogen and 21% oxygen. Air also contains small amounts of other gases such as carbon dioxide, neon, and hydrogen.

Related Questions to study

Identify the image of the Earth.

Identify the image of the Earth.

Name the sphere that contains all life.

Name the sphere that contains all life.

Biosphere is_________________.

Biosphere is_________________.

Outer core comprises of __________.

Outer core comprises of __________.

Observe the following image. It belongs to ________.

Observe the following image. It belongs to ________.

______________ is the main home of human being.

______________ is the main home of human being.

Earth’s magnetic field is developed in _____.

Earth’s magnetic field is developed in _____.

Jupiter is a/an __________

Jupiter is a/an __________

The name of the planet shown in the image is ________.

The name of the planet shown in the image is ________.

Earth is called a________ planet.

Earth is called a________ planet.

The outer planets are ________ the inner planets.

The outer planets are ________ the inner planets.

_________ is a dwarf planet that was once considered a full planet of the Solar System.

_________ is a dwarf planet that was once considered a full planet of the Solar System.

Pluto is a __________.

Pluto is a __________.

The following image is of_______.

The following image is of_______.

Name the planet that has life on its surface.

Name the planet that has life on its surface.

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20%
21%
78%
70%

The correct option is b)21%.
The air in Earth's atmosphere is composed of approximately 78% nitrogen and 21% oxygen. Air also contains small amounts of other gases such as carbon dioxide, neon, and hydrogen.