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fenix001 [56]
3 years ago
12

Why do we not know exactly when life first evolved on Earth? *

Geography
1 answer:
enot [183]3 years ago
6 0

Simple, we weren't around during that time, so we made theories and conclusions to when life evolved on earth.

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Why are ocean fossils found on top of the rocky mountains?
Anna35 [415]
Let's start from the beginning. 

<span>Millions and millions of years ago, planet Earth was absolutely crowded with volcanoes. </span>

<span>As you may know, volcanoes release steam and gasses. </span>
<span>As the years went by, the gasses released from volcanoes formed the atmosphere around the planet, which prevented the steam from disappearing into outer space. </span>
<span>The steam eventually, in cycles, began to fall back to Earth. Viola, rain had just been "invented". </span>

<span>As more and more rain fell, considering almost every surface of the planet was volcanic, the water began to build up and "flood" the planet. Many active volcanoes had now been transformed into underwater volcanoes. </span>

<span>As more and more years went by, eventually, bacteria in the water slowly began to evolve, first into jelly-fish like creatures, then tadpole-like creatures, leading all the way up to large ferocious underwater reptiles, amphibians and fish. </span>

<span>As the planet started to warm up, probably by methane gasses released from the prehistoric underwater creatures, the water levels on Earth began to drop again. At the same time, the active underwater volcanoes were creating new landmasses, either by lava cooling on the surface of the water or tectonic plates pushing the volcano above sea level. </span>

<span>So, this, is how fossils of sea creatures ended up in high land-based mountains. </span>
<span>Because millions of years ago, most of Earth was underwater until the water levels dropped or lands "grew" higher. </span>
<span>The Rocky Mountains were once underwater. </span>


<span>If you take a look at images of the Grand Canyon in the United States, you'll see that it resembles the deep caverns and canyons that you find at the bottom of oceans. </span>
<span>That's because the Grand Canyon WAS at the bottom of an ocean.</span>
4 0
3 years ago
Read 2 more answers
Provide examples of the way maps are helping local governments become more democratic.
Andrei [34K]

Answer:

Maps help local governments become more democratic by giving local governments are more precise spatial knowledge of the regions that they govern.

This also applies for national or federal governments. Maps are an increasingly important source of information for government at all levels, because they are a great tool to place all kinds of information about a region: demographic information, economic information, physical geography information, and so on.

8 0
3 years ago
How could energy conservation help to control or decrease air, water and land pollution
guapka [62]

A large portion of our energy originates from consuming fossil fuels , consuming non-renewable energy sources dirties the air by putting all ash of harmful gases in it and also ozone harming substances which influence the atmosphere.

Conserving energy can anticipate things like synthetic compounds going into the air from control plants, or on the off chance that we drive less then we annihilate the air less in light of less CO2 outflows. Conserving energy additionally forestalls things like oil slicks into the sea.

Conserving energy can help with diminishing air, water, and land contamination in light of the diverse options we have for energy. We have sun powered power energy that is a sustainable source. Sun based power vitality doesn't contaminate the air that we inhale or discharge any ozone harming substances while creating power. You likewise have tidal energy that believers waves into clean, contamination free power. This shields the water from being dirtied.

3 0
3 years ago
Read 2 more answers
Why do debris flows contain a variety of sediment sizes?a. Intense rain generates surface flow with the power to move lots of se
My name is Ann [436]

Answer:

e. All of these

Explanation:

  • As the debris is geologically event with the water-laden masses of soils and rocks fragments and fall down from the mountains and a funnel into the stream channels and also, objects there paths with thick mud and blocks valleys. The volume if the debris flows generally ranged from the 100,000 cubic meters and frequent n the mountainous regions and can be very destructive.
4 0
3 years ago
Who is the head of state for both Australia and New Zealand?
Anni [7]
<span>C. the reigning monarch of the United Kingdom </span>
7 0
3 years ago
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