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Troyanec [42]
3 years ago
8

The global occurrence of earthquakes reveals that

Geography
1 answer:
blagie [28]3 years ago
4 0
The answer is D (they usually occur on the boundaries of plates.
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Describe in detail what causes seafloor spreading. Use as many key terms as possible.
bixtya [17]

Answer:

Seafloor spreading results from intense activity in the upper mantle which cracks the crust and pushes it away.

Explanation:

Seafloor spreading is a process that was first noticed by Alfred Wegener and was used by him in his theory of plate tectonics. There are three types of plate boundaries; convergent boundary, transform boundary, and divergent boundary. The last one is the one where seafloor spreading occurs.

The convection currents in the mantle are the process that breaks up the crust and move the tectonic plates, and when there is higher activity than usual at some place it results in break up the crust of an already existing tectonic plate.  Basically, magma rises at a higher rate and pushes through the crust, in this case, the oceanic crust, and it manages to gradually break through it and come out on the seafloor. By doing so, the magma and the pressure from below are pushing the two now divided parts of the plate. As the space between the two different parts becomes larger and large the density of the crust becomes smaller and smaller so more and more magma rises through. The magma quickly solidifies on the ocean floor and piles up, thus creating an underwater mountain range known as a mid-ocean ridge.

8 0
2 years ago
Load shedding effects on the people’s lives? In South Africa
statuscvo [17]

Answer:

Eskom chief operations officer, Jan Oberholzer, publicly stated that the primary reason for load shedding was due to a lack of maintenance and neglect over the preceding twelve years resulting in an unpredictable and unreliable system.

Explanation:

The year has already gotten off to an eventful start, with the South African Reserve Bank (SARB) unexpectedly cutting the repo rate by 25 basis points to 6.25%, while lowering 2020 economic growth projections down from 1.4% to 1.2%.

Of the opinion that this revised growth estimate may still be over-optimistic, Jeff Schultz, senior economist at global bank BNP Paribas South Africa, predicts another tumultuous year for the local economy.

Speaking at a BNP Paribas quarterly economic update event at Melrose Arch in Johannesburg on Monday (10 January), Schultz cited the continued electricity outages as the main reason behind this seemingly pessimistic view.

“Assuming that the first half of 2020 could see a minimum of 15-20 days of Stage 2 load-shedding, we estimate this could shave a further 0.3-0.4pp off growth, which is why we have lowered our already sub-consensus GDP growth forecast to just 0.5% from 0.8%.”

Schultz put the likelihood of a recession at between 30-40%, dependent on the state of power supply management going forward.

While noting that the recent rate cut came earlier than anticipated, Schultz said that another cut in the second half of the year cannot be ruled out.

“We think that there is still room for the SARB to make another 25bp rate cut later on this year, although timing will depend on February’s budget and the Moody’s rating decision.”

On the topic of the upcoming budget, Schultz hopes to see fiscal restraint through lower wage adjustments but also predicts a continued rise in debt ratios on low nominal GDP.

“With the primary balance adjustments likely to fall short of expectations and a weaker nominal GDP growth outlook, we think a decision by Moody to downgrade South Africa’s last remaining investment-grade credit rating is possible.

“It is our view that this downgrade of the sovereign rating will be felt more in economic confidence than in local asset prices,” he added, noting that the downgrade is already relatively well discounted by markets.

“This is not to say that there would not be forced passive selling of SAGBs owing to South Africa’s likely exit from the FTSE World Government Bond Index. However, we believe the net effect is likely to be smaller than the $5-8 billion in potential outflows that the SARB has warned about.”

With all eyes sure to be on government’s plans for South Africa’s ailing state-owned enterprises – especially the restructuring of Eskom and SAA – Schultz believes economic reform could be highly beneficial.

“We expect to see some hope on medium-term growth prospects through progress on institutional reforms and corruption prosecutions.

“However, several events in mid-2020 might contribute to an increase in political noise which might impact the speed of the process,” he said.

5 0
3 years ago
Which of the following are ways in which the Madrid Protocol protects Antarctica?
amm1812

Answer:

prohibits the introduction of invasive species

controls the kind of waste and pollutants allowed

assesses human influence on the environment

designates protected zones on the continent

Explanation:

These four key terms are some of what the Madrid Protocol includes.

Prohibiting the introduction of invasive species keeps the ecosystem from being dominated and/or destroyed by a single species that the ecosystem is not built to handle.

Controlling the kind of waste and pollutants allowed on the continent ensures that the environment remains stable without the influence of outside chemicals, such as oil or carbon emissions that could harm the ecosystems.

Assessing human influence on the environment keeps track who does what and how they do it, essentially preventing extreme human action from being taken so as to preserve Antarctica's natural order.

Designating protected zones on the continent that can only be accessed with special permits ensures that only people who require access for research or whatnot, or more simply, qualified personnel, are able to enter these zones, so as to keep contact down to a minimum and further preserve Antarctica's natural environment.

6 0
1 year ago
Name the three oceans that border the continent on which you live
ycow [4]
Indian ocean
Atlantic ocean
pacific ocean
3 0
3 years ago
What air masses affect<br> the weather in southern<br> California?
shtirl [24]
“The southern portion of the Pacific coast—particularly southern California—can be influenced by maritime tropical air masses, abbreviated mT. These warm, moist air masses originate in the subtropical Pacific Ocean. They may bring fog or low clouds with them.”
5 0
3 years ago
Read 2 more answers
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