Answer:
Explanation:
Geologists believe that the impact of a 13-km-wide meteorite 65 million years ago generated a hot-air blast and blaze that caused worldwide forest fires.ejected chemicals into the atmosphere that produced acid rain, ejected debris into the atmosphere that caused months of winter-like night conditions halting photosynthesis and generated 2-km high tsunamis.
Answer:
c. ejected chemicals into the atmosphere that caused thousands of years of winter-like night conditions that halted photosynthesis.
Explanation:
This was the result obtained by the researchers when an investigation was carried out regarding to the meteorites impact on earth 65 million years ago.
The principle of fossil succession states that:
a. fossil species found in rock are the same as species living today.
b. every fossil species spans only a limited range of rock layers, corresponding to the time period over which it lived.
c. every rock layer contains only one species of fossil.
d. the same fossil assemblages appear throughout geologic time in a repeating intervals.
Answer:
B. Every fossil species spans only a limited range of rock layers, corresponding to the time period over which it lived
Explanation:
A. Fossil species found in rock are the same as species living today: This is incorrect as the fossil record contradicts that statement.
C. Every rock layer contains only one species of fossil: Example, Ghost Ranch, New Mexico United States. The locality is famous for the Coelophysis quarry which contains the fossils of a Bipedal Triassic dinosaur, the Coelophysis. Other fish fossils were located in the bone bed with the Coelophysis. This contradicts the above claim.
D. The same fossil assemblages appear throughout geologic time in a repeating intervals: Although some rock types do repeat in certain areas they usually don't contain the same fossils unless the rock types repeat in the same group of rock formations in the same time period even than fossils don't always last the whole period. One way of age dating rock formations is worked out by using different fossils and is called Biostratigraphy. This only works because different time periods contain different fossils.
The images show two different fronts. Item A: A cold front and warm front meet with high level, grey clouds. Item B: Warm air is above cold and very cold air, lower clouds with rain falling. Which fronts are shown?
Answer:
D
Explanation:
Item A shows a stationary front, and item B shows an occluded front.
What is stationary front?A weather front or transition zone between two air masses (cold and warm) is said to be stationary when neither air mass is moving into the other at a ground-surface speed greater than 5 knots.
A warm air mass stuck between two cold air masses creates an occluded front. As the chilly air masses push against one other and collide in the center, the warm air mass rises. As the warm air mass is forced upward and occluded, or "cut off," from the earth, the temperature decreases.
A stationary front is one that is moving very slowly or not at all between warm and cold air masses. An occluded front is a combination of two fronts that develops when a cold front passes over a warm or nearly stationary front.
To learn more about occluded front
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At which location would an object s weight be the greatest
Answer: Option #3 or C. on the Sun
Explanation:
Option #3 or C. on the Sun. Got it correct on Edge.
The _____ side of a mountain range often has lush plant life?
Answer:
The bottom side of a mountain range often has lush plant life.
The windward side often has lush plant life.
which of the following peninsulas are in southwest asia
Answer: Arabian Peninsula
If P (7, 5) and P' (2,8) then the rule for translation is
Answer: (x-5,y+3)
Explanation:
The coordinates of P was translated 5 units to the right and 3 units up to get the coordinates of P' or P prime.
Deforestation is a major problem in the Amazon Rainforest. Which American state is about the size of the area of the
Amazon that was cleared between 1990 and 2010?
A. Arizona
B. Maine
C. Texas
D. Montana
Please select the best answer from the choices provided
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Answer:
The correct answer is D. The state of Montana is about the size of the area of the Amazon that was cleared between 1990 and 2010.
Explanation:
Deforestation is the main problem that threatens the ecological stability of the Amazon jungle, generating through the reduction of forest land contamination, extinction of native species, alteration of ecosystems and many other damages to the environment.
It is calculated that more than 18,000 square kilometers of jungle are cut or burned annually, which, projected over 20 years, gives more than 360,000 square kilometers in which the Amazon jungle has been reduced due to human action. This amount of territory can be compared with the extension of the state of Montana, which has an area that exceeds 380,000 square kilometers.
answer: D
Explanation:
The state of Rondônia in western Brazil — once home to 208,000 square kilometers of forest (about 51.4 million acres), an area slightly smaller than the state of Kansas — has become one of the most deforested parts of the Amazon.
20 percent
That is more than 150 acres lost every minute of every day, and 78 million acres lost every year! More than 20 percent of the Amazon rainforest is already gone, and much more is severely threatened as the destruction continues. It is estimated that the Amazon alone is vanishing at a rate of 20,000 square miles a year.
Threats Facing The Amazon Rainforest
Ranching & Agriculture: Rainforests around the world are continuously cut down to make room for raising crops, particularly soy, and cattle farming. ...
Commercial Fishing: Fish are the main source of food and income for many Amazonian people. ...
Bio-Piracy & Smuggling: ...
Poaching: ...
Damming: ...
Logging: ...
Mining:
The forests are cut down to make way for vast plantations where products such as bananas, palm oil, pineapple, sugar cane, tea and coffee are grown. As with cattle ranching, the soil will not sustain crops for long, and after a few years the farmers have to cut down more rainforest for new plantations.
What changes are occurring to the size of the Amazon rainforest?
Climate change and deforestation could convert the majority of the Amazon rainforest into savanna, with massive impacts on the world's biodiversity and climate.
Deforestation and forest degradation are responsible for around 15% of all greenhouse gas emissions. These greenhouse gas emissions contribute to rising temperatures, changes in patterns of weather and water, and an increased frequency of extreme weather events.
about 100 years
In addition to the carbon release associated with deforestation, NASA has estimated that if deforestation levels proceed, the remaining world's forests will disappear in about 100 years.
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