When our Earth was covered with water?

Earth may have been a ‘water world’ 3bn years ago, scientists find. Scientists have found evidence that Earth was covered by a global ocean that turned the planet into a “water world” more than 3bn years ago.

When the earth was with water all creatures had to swim in it a cover B covers C covered?

Answer: When the earth was covered with water, all creatures had to swim in it. When the water subsided, the land that was covered appeared. All creatures crawled out and learnt to breath and move on land.

Which of the following part of the earth is converted by water?

Option A- of the total earth surface 71% part is covered by water rest 29% comprises land. The water part comprises oceans, rivers, lakes, underground water and ice. Which of the following is not a terrestrial ecosystem?

How many parts are covered by water?

Answer. Answer: About 71 percent of the Earth’s surface is water-covered, and the oceans hold about 96.5 percent of all Earth’s water.

Are present all around us in air as well as in water?

Gases are present all around us in air as well as in water.

Gases are also present in water in dissolved form. Such as Nitrogen, Carbon dioxide, ammonia etc.

Is transparent and has no Colour?

Answer: When light encounters transparent materials, almost all of it passes directly through them. Glass, for example, is transparent to all visible light. The color of a transparent object depends on the color of light it transmits. …

What does the child see when he is up in the air?

Answer: The child sees trees, rivers and cattle over the countryside while he is up in the air.

What is the moving air called?

Air is constantly moving around the earth. This moving air is called wind. Winds are created when there are differences in air pressure from one area to another.

What is morning air called?

General Science

Morning air is called fresh air. Explanation: Trees just started the process of photosynthesis (to make oxygen) so the air whuch is present in morning has more quantity of pure oxygen. So the morning air is called fresh air..

How hot or cold the air is?

Air temperature is a measure of how hot or cold the air is. It is the most commonly measured weather parameter. More specifically, temperature describes the kinetic energy, or energy of motion, of the gases that make up air.

What are the 4 types of wind?

Types of Wind – Planetary, Trade, Westerlies, Periodic & Local Winds.

Where is the horse latitude?

The horse latitudes are subtropical regions known for calm winds and little precipitation. The horse latitudes are regions located at about 30 degrees north and south of the equator. These latitudes are characterized by calm winds and little precipitation.

What if there was no wind?

Absent a gentle breeze or mighty gale to circulate both warm and cold weather around the Earth, the planet would become a land of extremes. Areas around the Equator would become intensely hot and the poles would freeze solid. Whole ecosystems would change, and some would completely disappear.

What is the sea breeze?

sea breeze, a local wind system characterized by a flow from sea to land during the day. Sea breezes alternate with land breezes along the coastal regions of oceans or large lakes in the absence of a strong large-scale wind system during periods of strong daytime heating or nighttime cooling.

Do they still make Seabreeze?

I was very happy to see that Sea Breeze is still available, but the new product does not quite measure up to the original.

What causes wind?

Wind is caused by uneven heating of the earth’s surface by the sun. Because the earth’s surface is made up of different types of land and water, it absorbs the sun’s heat at different rates. One example of this uneven heating is the daily wind cycle.

How sea breeze happens?

Sea breezes occur during hot, summer days because of the unequal heating rates of land and water. During the day, the land surface heats up faster than the water surface. Therefore, the air above the land is warmer than the air above the ocean. Now, recall that warmer air is lighter than cooler air.

Why is wind stronger over water?

The winds, whether generated by a coastal storm or an afternoon summer sea breeze, blow faster over the ocean than over the land because there is not as much friction over the water. The land has mountains, coastal barriers, trees, human-made structures, and sediments that cause a resistance to the wind flow.

Why is sea water cold in day time and warm at night?

Why the water in the beach feels warm during the night and cold during the day? The great ocean conveyor moves water around the globe. Cold, salty water is dense and sinks to the bottom of the ocean while warm water is less dense and remains on the surface. Cold water has a higher density than warm water.

What happens to air when heated?

As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.

Does cold air rise or 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.

Which warms up faster land or water?

It takes less energy to change the temperature of land compared to water. This means that land heats and cools more quickly than water and this difference affects the climate of different areas on Earth.

How does the air get cold?

The reason the can gets cold after being used is due to a process known as adiabatic cooling, a property of thermodynamics. A gas, initially at high pressure, cools significantly when that pressure is released.

Why are deodorant cans cold?

Ans. Deodorants contain low boiling point compounds like ethanol, which when come in contact with our skin, evaporate quickly by taking the required latent heat of vaporisation from the skin making it feel colder. Also, when the deo is sprayed, its contents come out from high pressure area to the low pressure area.

Can of air sprayed on skin?

The liquid inside canned air can cause frostbite when the skin is exposed to a steady stream. This can vary from an intense burning sensation to serious physical injuries such as skin cracking, and damage to muscles, blood vessels and nerves.