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Papessa [141]
3 years ago
8

Crustal plate movement occurs because the Earth's mantle flows as a result of uneven heating inside the mantle. Convection cells

are created by very hot material deep in the mantle rising, then cooling, sinking again, and then heating again and then repeating the cycle. This process occurs because of the energy generated by _________________ within the Earth.
Geography
2 answers:
Tresset [83]3 years ago
8 0
The energy is generated by the semi-molten core of the earth which drives the convection currents in the mantle and which causes the plates to move in plate tectonics. James Hutton was the first geologist to intepret that the plutonic rocks on surface like granite were once molten.
mamaluj [8]3 years ago
3 0

It is because of the radioactive decay of elements.

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Why are harbors important<br> to trade?
seropon [69]

Answer:

Harbors can provide safe anchorage and permit the transfer of cargo and passengers between ships and the shore. A harbor is deep enough to keep ships from touching bottom and should give ships and boats enough room to turn and pass each other.

Explanation:

6 0
2 years ago
How do the population densities of La Paz and Lima compare?​
Gre4nikov [31]

Answer:

La Paz is a bit more densely populated than Lima, since the former has a population density slightly higher than this of latter.

Explanation:

In this case, we need to know the populations and occupied area of the city. By definition, population density is the ratio of the population of the city to the occupied area in the same location.

The required information is gathered below:

La Paz (Bolivia)

Population: 1.801 million (Metropolitan area)

Occupied area: 475 square kilometers.

Population density: 3792 inhabitants per square kilometer.

Lima (Perú)

Population: 9.674 million

Occupied area: 2672 square kilometers.

Population density: 3621 inhabitants per square kilometer.

In this case, La Paz is a bit more densely populated than Lima, since the former has a population density slightly higher than this of latter.

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6 0
3 years ago
How is energy from the sun distributed around earth?
amm1812
There are a few different answers to this question, depending on what you are asking. I'll go over the main ones.

1. The Earth's axis is tilted in comparison to the Sun, so days get shorter in the winter months. This is due to less light, and therefore energy, hitting the Earth directly. Instead, that energy either misses entirely, or hits nearer to the Equator. This is why the poles have twenty-four hour days and nights depending on the season. (Night in the winter, day in the summer.)

2. In terms of the food chain, energy from the sun is converted to basic sugars by plants in a process known as photosynthesis, inside the plant's cloroplasts. Small animals such as mice and insects consume the plants, and the energy those plants converted from sunlight. This continues up the food chain until you get to apex-predators (tigers, bears, wolves, owls, etcetera).

3. In terms of electricity, solar panels are made of tons of 'solar cells' which tend to be lots of silicon atoms, which like to share electrons, and a conductive backing. (Pardon me if some of this section is incorrect, I only have a basic understanding of solar panels) When a photon (that is, a light particle) hits the silicon, it bumps off an electron, and the conductive backing catches it, resulting in a electrical current. This current is incredibly small per solar cell, so you need a ton of them to make any sort of useful power out of them. Solar panels do degrade over time, but incredibly slowly, there are some from the 1970's that still generate just as much power as they did originally (if not, only ever so slightly less).

I hope I answered what you needed to know! If you wanted a different answer, feel free to comment with some clarification and I would love to fill you in :)
3 0
3 years ago
Read 2 more answers
A marine climate is generally characterized by
kicyunya [14]

Answer:

a.  Milder weather in the summer but colder weather in the winter

Explanation:

  • The oceanic climate of the marine climate s dominated by fewer temperature extremes. Having a monthly mean temperature below 22 degrees. As precipitation is evenly distributed through the seasons.
  • In the polewards type of climate dominant precipitation in the form of snowfall is more frequent they have a mild west coast around the middle latitudes. All depending on the type of land and ocean surface.
  • Mostly the presence of milder climates around the world and is prevalent in most parts of Oceania.
6 0
2 years ago
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