Answer:The law of superposition states that rock strata (layers) farthest from the ground surface are the oldest (formed first) and rock strata (layers) closest to the ground surface are the youngest (formed most recently). A fossil is the remains or traces of plants and animals that lived long ago.
Explanation:
Law of Superposition
The relative ages of rocks are important for understanding Earth's history. New rock layers are always deposited on top of existing rock layers. Therefore, deeper layers must be older than layers closer to the surface. This is the law of superposition.
Something that we hope you have learned from these lessons and from your own life experience is that the laws of nature never change. They are the same today as they were billions of years ago. Water freezes at 0° C at 1 atmosphere pressure; this is always true.
Knowing that natural laws never change helps scientists understand Earth’s past because it allows them to interpret clues about how things happened long ago. Geologists always use present-day processes to interpret the past. If you find a fossil of a fish in a dry terrestrial environment did the fish flop around on land? Did the rock form in water and then move? Since fish do not flop around on land today, the explanation that adheres to the philosophy that natural laws do not change is that the rock moved.
1What type of unconforruity is represented between layers E+I+F and E? Is intrusion C older or younger than
layers D, H, and A? Which principle do you apply to solve this? Is fault *5 older or younger than intrusion C? Which
principle do you apply to solve this? Rock sequence fi'om oldest to youngest:
Answer:
boron and carbon isotope, Phytane, Ice cores, Corals, Lake and ocean sediments etc.
Explanation:
- Drillings in ice cores like within ice sheets of Greenlands, Antarctica started in 1956. Collecting core samples of 4 and a half inches and use of molecules of water O 16 and 18 that helps to determine the past atmospheric carbon.
- Corals, skeletal rings have bands of paleo-climatological information and as their body is made of the calcium carbonates these limes creating organisms help to determine the atmospheric concentration of carbon on prehistoric earth.
- The use of oxygen isotope in lakes and oceans has given data related to the content of ocean sediments, and values deposited in clay and sand.
- The use of phytane a diterpenoid alkane that breaks down chlorophyll is used to estimate the ancient Co2 level.
Answer:
False, East Asia thrived in crop growing.
Explanation:
Answer:
1- One of the most immediate and obvious effects of worldwide warming is the increase in temperatures around the world. The average worldwide temperature has increased by about 1.4 degrees Fahrenheit (0.8 degrees Celsius) over the past 100 years, according to the National Ocean-related and (related to the air outside) Management (NOAA).
The (related to the air outside) carbon dioxide concentration has risen from about 270 parts per million (ppm) before 1700 to about 355 ppm today. Climate changes, including a mean worldwide surface temperature rise of between 2.8 and 5.2°C, have been (described a possible future event) by five independent general circulation models (GCMs) for a doubling of the carbon dioxide concentration. The goals of this paper are to examine plant responses to rising carbon dioxide levels and (related to the Earth's weather) changes and to understand/explain the results of these changes on crop water use and water supplies for the United States.
2- Human activity has increased the direct warming effect of carbon dioxide in the atmosphere by 50 percent above pre-industrial levels during the past 25 years, according to NOAA's 10th Once-a-year (glass building where plants are grown) Gas Index.
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