How many species of hominin coexisted 100,000 years ago?

1 answer:

4 0

100,000 years ago, there were three species of hominin that coexisted on Earth. They were Homo heidebergensis, Homo neaderthalensis, and Homo erectus.

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WILL GIVE A BRAINLEST

natka813 [3]

<h3>Answer;</h3>

absorbed by Earth’s core

When energy from the sun reaches Earth, it is not absorbed by Earth's core.

<h3>Explanation;</h3>

The energy from the sun reaches the earth, such that 23 percent of the incoming solar radiation is absorbed by the atmosphere by water vapor, dust and ozone.
48 percent of the solar energy is absorbed by the earth's surface, this translates to 71 percent of the energy which is absorbed by the systems of the Earth.
The remaining 29 percent is reflected back to space by clouds, atmospheric particles etc.

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3 years ago

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All of the following are examples of limiting factors except

elena-14-01-66 [18.8K]

Answer:

soil is the answer

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3 years ago

How are elements, compounds, mixtures alike?

Alex

Answer:

A compound contains atoms of different elements chemically combined together in a fixed ratio. A mixture is a combination of two or more substances where there is no chemical combination or reaction. ... Mixtures contain different elements and compounds but the ratio is not fixed nor are they combined via chemical bonds.

Explanation:

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2 years ago

What is the oxygen cycle ?

icang [17]

Oxygen cycle is the cycle which maintains the level of oxygen in the atmosphere.
Oxygen from the atmosphere is used up during combustion, respiration and in the formation of oxides of nitrogen.
This oxygen is returned to the atmosphere by lithosphere.
This forms the oxygen cycle in nature.

Hope you could get an idea from here.

Doubt clarification - use comment section.

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2 years ago

Describe one major laboratory accident mentioned in the training presentation, what chemicals were involved, the type of PPE tha

olga2289 [7]

One major lab accident was of fire where gases were exposed to heat.

Explanation:

Accidents that occur in the laboratory which lead to some mishappening are known as the lab accidents. The reasons for such accidents may be many like fire, chemical spills, personal injuries and so on. To avoid all this, there should be proper check and focus while working in the lab.

One of the major lab accidents was of the fire when gas was exposed to heat. The chemical involved in this accident was the use of methane. The type of personal protective equipment worn at the time of accident was protective eye-wear and the lab coat and the lab gloves. To avoid such kind of accidents, people in lab should be very careful and it should be made sure that there are proper equipment in case of any mishap.

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3 years ago