what happens to air at the equator

In review, on a non-rotating earth, warm air would rise at the equator, go to the poles, sink to the surface, and flow back to the equator. But because the earth rotates, air is deflected from this path. Air rising at the equator only gets about 30° N and sinks back down to the earth, making the Hadley cell.

What happens as warm air rises and cools over the equator?

Along the equator air is rising as it is warmed by solar radiation (section 8.2). … So the air rising at the equator is warm and full of water vapor; as it rises into the upper atmosphere it cools, and the cool air can no longer hold as much water vapor, so the water condenses and forms rain.

How is Earth’s air produced?

Volcanoes bubbled and released gases from the Earth’s interior for millions of years. The dominant gases released consisted of carbon dioxide, water vapor, hydrogen sulfide and ammonia. Over time these gases accumulated to form the Earth’s second atmosphere.

What happens to water vapor as air rises at the equator?

Hot, humid air rises over the equator. … As air expands due to this decreasing pressure, it also cools. Since cool air is able to hold less water vapor than warm air, condensation occurs. This is why the equatorial regions normally have very high rainfall.

Why are climates generally wet near the equator?

Moisture. … Warm air (gas) holds more moisture than cold. As air above the equator rises, it cools and is unable to hold all of the moisture–so it rains at the equator, creating the climate and moisture conducive for tropical rainforests (known as the intertropical convergence).

Why does air flow to the poles?

At the poles, the cold dense air sinks. Air from the upper levels of the atmosphere flows in on top of it increasing the weight and creating an area of high pressure at the poles. The air that rises at the equator does not flow directly to the poles. … The sinking air reaches the surface and flows north and south.

What happens to air when it is heated at the equator quizlet?

Wind causes air to move because of the differences in air pressure. The uneven heating of the Earth causes differences in air pressure. At the equator, warm air, which is less dense, rises, causing a low pressure. This is because the equator receives more direct solar energy than any other latitudes.

Why is the air at the equator less dense and rises?

Due to the tilt of the Earth, the air around the equator is consistently warmed. This warm air is less dense and rises. … Winds generally move from the poles to the equator because air moves from areas of high pressure to areas of low pressure.

What happens to the air in the surroundings as warm air rises?

As air warms up, the molecules start to vibrate and bump into each other, increasing the space around each molecule. Because each molecule uses more space for motion, the air expands and becomes less dense (lighter).

What is created when warm air rises at the equator and cold air sinks at the poles?

Air rises at the equator and sinks at the poles, creating a single convection cell in each hemisphere. The prevailing winds moving over the Earth’s surface blow from the poles towards the equator in both hemispheres (Modified by PW from globe image by Location_of_Cape_Verde_in_the_globe.

How is air a fluid?

A fluids is any substance that flows. Air is made of stuff, air particles, that are loosely held together in a gas form. Although liquids are the most commonly recognized fluids, gasses are also fluids. Since air is a gas, it flows and takes the form of its container.

Which came first water or air?

The atmosphere, or air, was first, followed by the water.

Can you breathe in pure oxygen?

Oxygen radicals harm the fats, protein and DNA in your body. This damages your eyes so you can’t see properly, and your lungs, so you can’t breathe normally. So breathing pure oxygen is quite dangerous.

What happens to the air pressure at the equator as the warm air rises?

The air pressure decreases as the hot equatorial air rises through the atmosphere because there is less and less weight of air overhead. The rising air expands due to the decreasing pressure.

What happens to the rain after reaching the ground?

Once on the land, rainfall either seeps into the ground or becomes runoff, which flows into rivers and lakes. … Water falling on uneven land drains downhill until it becomes part of a stream, finds a hollow place to accumulate, like a lake, or soaks into the ground.

Is there more oxygen near the equator?

The pressure at the equator will be greater than the pressure at higher altitudes. Because of this, more oxygen gas is dissolved in the water at the equator than at higher altitudes.

Why does the Sahara get no rain?

Hot, moist air rises into the atmosphere near the Equator. … As it approaches the tropics, the air descends and warms up again. The descending air hinders the formation of clouds, so very little rain falls on the land below. The world’s largest hot desert, the Sahara, is a subtropical desert in northern Africa.

Why is the equator not the hottest place on earth?

This is because as the dry air descends from high altitudes, its compression leads to an increase in its temperature. … Therefore, air temperature in the tropics (42 degrees Celsius) is greater than that of the Equator (30 degrees Celsius). This is why tropical regions are hotter than the Equator.

Why is the equator the hottest?

Why is it hot at the Equator and cold at the poles? Due to the tilt of the Earth, the Equator is closer to the sun so receives more of its energy. The Equator has a smaller surface area so heats up quickly compared to the poles. … This means more heat from the sun makes it to the surface of the Earth.

Why does the air sink at the North Pole?

1. The very cold air over the poles is so dense that it has a tendency to sink vigorously to the surface, creating high surface pressure — polar highs. The air then moves equatorward, because that is the only direction it can go from the pole.

Why does air crossing the equator turn right?

Because the Earth rotates on its axis, circulating air is deflected toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere. This deflection is called the Coriolis effect.

What happens to the Coriolis effect at the equator?

The Coriolis deflection decreases as latitude decreases, until it is zero at the equator. In the Northern Hemisphere, the sense of Earth’s rotation is counterclockwise as seen from above the North Pole.

Why does air rise at the equator quizlet?

Wind causes air to move because of the differences in air pressure. The uneven heating of the Earth causes differences in air pressure. At the equator, warm air, which is less dense, rises, causing a low pressure. This is because the equator receives more direct solar energy than any other latitudes.

What happens to warm air when it cools?

As air warms up, the molecules start to vibrate and bump into each other, increasing the space around each molecule. … The opposite effect happens when air cools. As the temperature drops, molecules move more slowly, taking up less room. The amount of space the air takes up shrinks, or reduces the air pressure.

Where does the cool air move to?

At the top of the troposphere, half moves toward the North Pole and half toward the South Pole. As it moves along the top of the troposphere it cools. The cool air is dense and when it reaches a high pressure zone it sinks to the ground. The air is sucked back toward the low pressure at the equator.

Why does the cold air sink?

This is because cold air sinks. … Cooler air is denser, hence heavier since the molecule bonds absorb lesser energy than hot air. That is why cold air stays closer to the surface.

Is air thinner at the poles?

This means at the north and south pole, the atmosphere is thinner than anywhere else on earth, because the air is pulled away from there. Ozone is in the same percentage all around the earth (because gasses diffuse % evenly) so it is natural that there is less at the poles.

Why is the Earth unevenly heated?

Solar heating of the Earth’s surface is uneven because land heats faster than water, and this causes air to warm, expand and rise over land while it cools and sinks over the cooler water surfaces. … Air moves because of these differences as it is expands where it’s hot and contracts where it’s cold.

What made the air move in that direction?

The Movement of Air. Movement of air caused by temperature or pressure differences is wind. … This is due to the rotation of the Earth beneath the moving air, which causes an apparent deflection of the wind to the right in the northern hemisphere, and left in the southern hemisphere.

What happens when air gets heated?

When air is heated, the molecules will start to vibrate and bump into each other Because each molecule uses more space for motion, the air expands and becomes less dense. Therefore, the air expands when heated. When the air becomes warm, its air rises, and when it rises it becomes cooler.

What warm ups faster?

Water reflects most solar radiation that reaches its surface back to the atmosphere. Since land absorbs more solar radiation the land surface retains more heat as do the vegetation for energy. Thus, land surfaces warm more quickly than water.

Why is the warmer air rising while the colder air is sinking?

Hot air rises because it is less dense than cold air, so air will rise above a heater and sink near a cold window. … Hot air rises, because it’s less dense than cold air. Warm air in a room quickly rises upward, and cold air sinks downward, even if the tempera- ture differences are quite small.