Scientists<span> can tell by observing the seismic waves that are recorded all over the surface of the </span>earth<span> from distant earthquakes. The seismic waves are reflected (bounced off) </span>layers<span> of different density, and they are refracted (bent) when they enter </span>layers<span> of different density.</span>
Answer:
Waves meet the shore and cause the crest to spill over the trough.
Explanation:
This activity creates a back and forth movement of the sand which causes them to settle at a certain area below the water.
Answer:
The Democratic Republic of the Congo (DRC), the second-largest country in Africa, has been mired in conflict for decades. A country of paradoxes, it is a land rich in natural resources, but its people are among the poorest in the world.
While the DRC has vast amounts of oil, diamonds, gold, and other natural resources, a majority of the population — about 64% — is considered extremely poor and lives on less than $1.90 a day, according to World Bank estimates.
The country is fraught with political instability, armed clashes, and human rights violations. Conflict erupted in 2016 in the Kasai region, which includes five provinces in the center of the country. It is yet another instance of fighting between the military and splintered ethnic militias. Nationally, 2.1 million people were newly displaced in 2017 and 2018, making the DRC the African country with the highest number of internally displaced people — 4.5 million. About 13 million people lack adequate food, including more than 1.3 million children under 5 affected by severe acute malnutrition.
Ebola alert — July 17, 2019: The World Health Organization has declared an Ebola outbreak in northeast DRC that began in August 2018 to be a public health emergency of international concern. WHO chief Tedros Adhanom Ghebreyesus called for countries to commit more resources to fight the disease. His announcement came three days after a case of Ebola was confirmed in Goma, the capital of Northern Kivu province, which is a transportation hub and home to 1 million people.
Ebola briefly broke out in May 2018 in northwestern DRC, then the deadly virus resurfaced in August in the northeast. This is the 10th outbreak of the deadly viral disease in the DRC since it was identified in the 1970s. Earlier outbreaks were quickly contained and didn’t spread beyond isolated rural communities.
Explanation:
Type of Erosion Control<span> </span>Pros of Using this Control
- Jetties - protect buildings on beaches from losing sand
- Breakwaters - Stop the waves from hitting the beach
- Beach Renourishment - easy way to prevent sand erosion
- Planting of dune grasses and plants - roots hold sand together and make it more difficult to wash away
Cons of Using this Control
- can seriously affect the tidal circulation and the health of wetlands
- changes profile of the beach
- can cause bottom organisms and habitats to e smothered by muddy water
- can make the beaches difficult to use for recreation
<span>Paragraph:
</span> I think that Breakwaters<span> are the best to use. One reason is the only major con that is has is changing the profile of the beach instead of harming wildlife and taking away funding (recreational use.) Another reason is that the rocks used provide great climbing tools for beachgoers and might entertain them. A third reason is that breakwaters can be underground as well, not damaging the beach very much. Finally, they save millions of dollars in replacing sand.</span>
