Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.
When do stars, in their life cycles, fuse other elements together heavier than hydrogen or helium?
Answer:
As the main sequence star glows, hydrogen in its core is converted into helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by nuclear fusion, the core becomes unstable and contracts. The outer shell of the star, which is still mostly hydrogen, starts to expand. As it expands, it cools and glows red. The star has now reached the red giant phase. It is red because it is cooler than it was in the main sequence star stage and it is a giant because the outer shell has expanded outward. In the core of the red giant, helium fuses into carbon. All stars evolve the same way up to the red giant phase. The amount of mass a star has determines which of the following life cycle paths it will take from there.
diagram of the life cycles of low and high-mass stars
The life cycle of a low mass star (left oval) and a high mass star (right oval).
the different evolutionary paths low-mass stars (like our Sun) and high-mass stars take after the red giant phase. For low-mass stars (left hand side), after the helium has fused into carbon, the core collapses again. As the core collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers. The core remains as a white dwarf and eventually cools to become a black dwarf.
Explanation:
4. If a ball is dropped from the top of a 10 m building and it hits the ground 5 points 2 seconds later, what speed was the ball traveling? *
Attendance:Timothy 2-18-21
1.David Paner
2.Beverly JosonAttendance:Timothy 2-18-21
1.David Attendance:Timothy 2-18-21
1.David Paner
2.Beverly Joson 2-18-21
1.David Paner
2.Beverly Joson
2.Beverly Joson
Does anyone know the Answer to this question?
Which physical feature separtes North Afican and the Middle East?
Answer:
The Red Sea
Explanation:
Which of the following statements must be true about this diagram? Check
all that apply.
wº
I A. y + z = w
I B. W>y
C. W> x
1 D. z>x
1 E. x + y = 2
O F. X+ y = w
Answer:
a b f and e
Explanation:
I just know it is
Where are 90% of volcanoes located?
Answer:
The ring of fire
Explanation:
Seventy-five percent of Earth's volcanoes—more than 450 volcanoes—are located along the Ring of Fire. Ninety percent of Earth's earthquakes occur along its path, including the planet's most violent and dramatic seismic events. This is where I was supposed to be going for my vacation, but that plan failed because of a volcano that had erupted so badly.
A fish farmer intends to place a few cages along the coast of a large inland lake in Africa to grow a popular species of fish from North America. Which of the following is the most valid concern for people who practice traditional subsistence or commercial fishing in the area?
A.
If fish escape the cages, they may disrupt native species and reduce fishing production.
B.
The caged fish may consume all the nutrients in the lake water and cause a die-off.
C.
North American fish species produce excess nutrients that will create algae blooms.
D.
The local population will become accustomed to eating more fish, causing overfishing.
E.
The introduced fish will not be incorporated into local diets, and the new industry will fail.
Answer:
The answer is A.
Explanation:
In a new environment, a invasive species is not included in the natural niche yet and doesn't have any natural predators. In turn, this would cause the environment to bloom with these fish, along with different sub-species of this fish due to evolution and natural selection that would occur over the time it is an inhabitant.
This region usually has a warm and dry climate which is interrupted by two rainy seasons. It is home to the largest animal migration in the world. What is this region?
Explain one factor that has led to China becoming an "emerging economy" (3 Marks)
Answer:
They are referred to as 'emerging countries'. China's growth is partly due to its move from agricultural production to manufacturing. China joined the World Trade Organisation in 2001. Even today, many manufactured goods that we buy in the UK come from China.
Explain what happens during the new moon and full moon phases, as
seen from Earth.
Answer: From Earth POV, the new moon will appear to be completely dark, while the full moon, it will appear completely lit up
Explanation: In the new moon phase, the moon is in between sun and earth, the new moon phase is lit on the side of the moon thats facing the sun, while dark on the side facing the earth, in the full moon phase, the side of the moon facing the sun is also facing earth, making it visible completely.
what are 3 benifits of living in an under populated country?
In which location are earthquakes least likely to occur?
O A. Where tectonic plates are being pushed apart
O B. Along a fault line at a tectonic plate boundary
O C. At the center of a tectonic plate
O D. Where tectonic plates are being pushed together
At the center of a tectonic plate is the location are earthquakes least likely to occur. Hence, option C is correct.
What is a tectonic plate?Tectonic plates are massive pieces of the upper mantle and crust of the Earth. They are made up of both oceanic and continental crust. Earthquakes occur around mid-ocean ridges and important faults that create plate boundaries.
The heat generated by nuclear reactions taking place inside the planet's center causes the plates to move periodically toward and occasionally away from one another. This movement is also referred to as a tectonic shift.
There are four different types of boundaries between the tectonic plates as a result of their movement: divergent and convergent boundaries, transform fault boundaries, and plate boundary zones.
Thus, option C is correct.
For more information about a tectonic plate, click here:
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Help on 16 please!!!
it is c
Explanation:
I just took it so I know it is rigjt
If ALMN ASTR, then find the measure of ZS.
R
M
T
(2x + 30)
55°
65°
S.
N
0 65
23
O 180
O 90°
What are the different types of aid
Answer:
Types of aid
BILATERAL AID (also known as 'tied aid') - the country receiving the aid must spend the money on goods and services from the country providing it.
MULTILATERAL AID - high-income countries donate money through organisations such as the United Nations (UN) and the World Bank
Explanation:
MARK ME
How does a quickly changing coastline affect wildlife
Answer:
It can change the wildlife's habitat and which traits are favourable.
Explanation:
Ex: If there are less islands for seals to rest on, seals that can swim for longer periods of time will reproduce more.
Which lists a geographical feature that has kept the Balkan Peninsula isolated, and a second feature that helps overcome that isolation?
Surrounded by three seas/mountainous terrain
Mountainous terrain/surrounded by three seas
Alpine mountains/network of navigable rivers
Network of non-navigable rivers/flat, inland plains
PLEASE ANSWER QUICKLY GIVING 30 POINTS!
A solar flare does not last as long as a
prominence, but
A. .....it is more powerful and can reach Earth.
B. ....... it forms an arch and can be seen from Earth.
Answer:
I believe it is (( B ))
Explanation:
Solar flares are sun releases of energy from the surfae of the Sun and can intersect with the earth.
Sudden movements between the Earth’s plates results in:
Which term is used only in the North-Western part of Pacific Ocean?
Answer:
The Pacific Ocean is the largest and deepest of Earth's oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south and is bounded by the continents of Asia and Australia in the west and the Americas in the east.
Why isn't glass considered a natural resource
Answer:
Glass is not considered a natural resource because it has to be made and can not be found already made before humans
Explanation:
Answer:
Cuz its almost always man-made
Explanation:
Believe it or not, glass is made from liquid sand. You can make glass by heating ordinary sand (which is mostly made of silicon dioxide) until it melts and turns into a liquid. You won't find that happening on your local beach: sand melts at an incredibly high temperature of 1700°C (3090°F) Although most people think of glass as a man-made material, it is found in many forms in the natural world. ... Scientists tell us that glass is a state of matter rather than a single material. Glass is created when molten material cools so rapidly that there is not enough time for a crystalline structure to form.
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Softwood trees found in the temperate region is used to make
What is the main topography of the Philippines? Plateaus, mountains, plains
Answer:
the answer is mountains
11. Which of the following increases as you move from the crust to the
core (select all that apply)?*
30
Temperature
Pressure
Density
Thickness
12 Why is it import
Answer:
temperature
Explanation:
the hottest part is the core therefore, if you are moving closer to it, the temperature will be rising
What are the boundaries of central America
What are the borders of Central America? It is bordered by Mexico to the northwest, Colombia to the southeast, the Pacific Ocean to the west, and the Caribbean Sea to the east. The borders of Belize are Mexico, Guatemala, and the Caribbean Sea.
yes it was copy and pasted.
How are the relative length of geologic time periods determined?
Answer:
Geologists have done the same thing to geologic time by dividing the Earth's history into Eras -- broad spans based on the general character of life that existed during these times -- and Periods -- shorter spans based partly on evidence of major disturbances of the Earth's crust.
Explanation:
How are the three international conflicts similar and how are they different?
Answer:
International Conflict By Cate Malek Updated May 2013 by Heidi Burgess Definition: ... the term "international conflict" referred to conflicts between different nation-states
Explanation:
native to a certain place.
Answer:
1 : one born or reared in a particular place. 2a : an original or indigenous inhabitant. b : something indigenous to a particular locality. 3 : a local resident especially : a person who has always lived in a place as distinguished from a visitor or a temporary resident.
Explanation:
First of all, some background knowledge. Over the years, people have attempted to create a state named “Lincoln” in areas of eastern Washington, the panhandle of Idaho and western Montana. The most recent attempt was in 2005. My question is why don’t they just rename Washington State or Washington DC? Instead of cutting out a portion of 3 states? Wouldn’t that be easier? I mean, they only want to create Lincoln State because they think that it is unfair that only one president gets a state.
Answer:
um man i forgot
Explanation:
Summary of natural influences for rainforest.
Answer:
Throughout their existence, rainforests have been affected by natural forces like fire, drought, and storms. These events occur on a random basis and can damage large stretches of rainforest.
Humans are organisms that live on the surface of the Earth.
In recent years, many products that people use have released chemicals into the air. This has slightly changed the composition of the air that surrounds the planet.
Which statement describes this interaction?
A.
The biosphere interacted with the atmosphere.
B.
The atmosphere interacted with the geosphere.
C.
The geosphere interacted with the hydrosphere.
D.
The hydrosphere interacted with the biosphere.
Answer:
I believe that the answer ends most like a since humans live on the biosphere part of the world and we have affected the atmosphere around us causing to make it more dense and stuff