Answer:
True.
Explanation:
Climate has to do with how much energy is in the Earth system, is indeed a
"True statement" or the first option.
The Earth is purely powered on solar energy and depending on how much of the suns energy is in the Earth's system varies the climate. One of the most common examples of this are deserts. During the day in a desert, it is very hot and humid because the sun is giving off its energy which is heating up the sand making the area much warmer. When it's night it gets pretty cold, because the sun is no longer out giving off its energy in that area and is now cooling off.
Hope this helps.
Scientists combine several well-tested techniques to find out the ages of fossils. The most important are Relative Dating, in which fossils and layers of rock are placed in order from older to younger, and Radiometric Dating, which allows the actual ages of certain types of rock to be calculated.
Relative Dating. Fossils are found in sedimentary rocks that formed when eroded sediments piled up in low-lying places such as river flood plains, lake bottoms or ocean floors. Sedimentary rock typically is layered, with the layers derived from different periods of sediment accumulation. Almost any place where the forces of erosion - or road crews - have carved through sedimentary rock is a good place to look for rock layers stacked up in the exposed rock face. When you look at a layer cake, you know that the layer at the bottom was the first one the baker put on the plate, and the upper ones were added later. In the same way, geologists figure out the relative ages of fossils and sedimentary rock layers; rock layers, and the fossils they contain, toward the bottom of a stack of sediments are older than those found higher in the stack.
Radiometric Dating. Until the middle of the last century, "older" or "younger" was the best scientists could do when assigning ages to fossils. There was no way to calculate an "absolute" age (in years) for any fossil or rock layer. But after scientists learned that the nuclear decay of radioactive elements takes place at a predictable rate, they realized that the traces of radioactive elements present in certain types of rock, such as hardened lava and tuff (formed from compacted volcanic ash), could be analyzed chemically to determine the ages, in years, of those rocks.
Putting Relative and Radiometric Dating Together. Once it was possible to measure the ages of volcanic layers in a stack of sedimentary rock, the entire sequence could be pinned to the absolute time scale. In the Wyoming landscape shown below left, for example, the gray ash layer was found to be 73 million years old. This means that fossils in rock layers below the tuff are older than 73 million years, and those above the tuff are younger. Fossils found embedded within the ash, including the fossil leaves shown below right, are the same age as the ash: 73 million years old. So, there for the relationship between the age of a fossil and the layer of rock in which it was found dates back to about the same time era.
- Got this out of an article, hope it helps! (:
Answer is Nitrogen...............
Cnidarians are found in aquatic environments and possess two embryonic germ layers.
Cnidarians belong to the phylum Cnidaria and contain diverse organisms of more than 9000 species.
Cnidaria originates from Greek word "cnidos," which implies stinging nettle.
Over 11000 species of marine and freshwater environments accommodate in this group and is categorized under kingdom Animalia.
In order to capture a prey, special types of cells are present in them called 'cnidocytes'.
In sum, this phylum contains soft-bodied animals which includes jelly fish, sea anemones and corals.
If you need to learn more about aquatic environments click here
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Answer:
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