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nordsb [41]
3 years ago
9

What caused the decrease in the global human population in 1400?

Biology
1 answer:
Alinara [238K]3 years ago
4 0

Answer:

<u>Pandemic plague</u>

Explanation:

The Black death or the Great Plague occured during 1347 to 1351 in Eurasia causing death of almost 75 million to 200 million people. The cause of this plague was identified a bacterium known as <em>Yersinia pestis . </em>This plague outbreak was first major European plague pandemic and it killed almost 30% to 60% population of the Europe.

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Give three instantaneous scale (time) examples of Earth's systems, two long-term scale (time) examples of Earth's sytems, and th
Goshia [24]

The Earth comprises many spheres of subsystems, which associate with each other to develop a composite and spontaneously changing system of the Earth. The processes taking place in the system of the Earth occurs on spatial scales changing from fractions of millimeters to thousands of kilometers, and on time scales, which varies from milliseconds to billions of years.  

The examples of instantaneous scales are a rotation of the Earth, breathing, an earthquake.  

The examples of long-term scales are making coal and plate tectonics.  

The system of the Earth is featured by various overlapping cycles in which matter is recycled again and again. The cycles involve interactions between multiple spheres and systems. The examples of cycles are rock cycle, day and night, and seasons.  

Volcanoes discharge a huge concentration of particulate matter into the atmosphere. These particles function as nuclei for the development of droplets of water (hydrosphere). The rainfall, that is, hydrosphere usually upsurges after an eruption, initiating growth of the plant (biosphere). Thus, volcanoes and volcanic activities are a good illustration of system interactions.  


8 0
3 years ago
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Pretend you’re a researcher in charge of conducting new research on the flu research on the flu virus. Identify four scientific
borishaifa [10]

Answer:

Explanation:

A scientific researcher performs scientific methods to answer any natural process. The researcher will follow the protocol of a scientific method which includes: observe the natural phenomenon, ask related questions, suggest a hypothesis, perform the experiment and suggest answers.

In the given question if the researcher has to study about the flu virus, the possible questions he would ask will be:

1. The life cycle of the flu virus.

2. Effect of the virus on the life of an organism.

3. The mechanism used by the virus to replicate and to infect any organism.

4. Molecular mechanism of a virus.

3 0
3 years ago
Label the plant elements​
spin [16.1K]

Explanation:

everything can be found in the picture

3 0
2 years ago
1. Why is it important to conduct a market survey?​
myrzilka [38]

Answer:

ᗷEᑕᗩᑌᔕE

ITᔕ ᐯEᖇY IᗰᑭOᖇTᗩᑎT Iᑎ ᗰᗩᖇKET ᑕOᑎᑭETITIᐯEᑎEᔕᔕ. ITᔕ IᗰᑭOᖇTᗩᑎT ᗷEᑕᗩᑌᔕE ᗷEᑕᗩᑌᔕE YOᑌ ᑕᗩᑎ ᒪEᗩᖇᑎ ᗩᗷOᑌT ᗷᑌIᔕEᑎEᔕᔕ, Oᑎ ᕼOᗯ IT ᗯOᖇKᔕ ᗩᑎᗪ Oᑎ TᕼEIᖇ E᙭EᖇIEᑎᑕEᔕ. TᕼIᔕ Iᔕ IᗰᑭOᖇTᗩᑎT TO KEEᑭ TᕼE ᗷᑌIᔕEᑎEᔕᔕ ᔕᑌᑕᑕEᔕᔕᖴᑌᒪ, ᗩᑎᗪ OᖇGᗩᑎIᘔEᗪ.

3 0
2 years ago
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How many species of squid are there?
Arturiano [62]

Answer:

There are about 300 different types of species, but we've not explored even more than 50% of the ocean

Explanation:

6 0
3 years ago
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