Akun B
11 Mei 2024 17:12
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Akun B
11 Mei 2024 17:12
Pertanyaan
Amber is one of nature's gems. Ambers are interesting because they can contain (1) Creatures and plants from millions of years ago. They have also been used in You might have thought that ambers come from (2) tree saps. Actually, they are created from resins. The difference is that sap transports nutrients around the tree, while resin is semi-solid and acts as a defense response for the plant's immune system. When the tree has a (3) wound (like a broken branch) or if it is attacked by insects or fungi, it exudes thick resin that plugs up the injury and prevents further (4) damage It seals and sterilizes the injury. When resin is secreted, it's not certain that it will be turned into (5) Amber More often than ne it gets weathered away. First of all, the resin needs to be chemically stable and not degrade over time. It has to be resistant to sun, rain, extreme temperatures, and (6) microorganisms like bacteria and fungi. There are two types of resin produced by plants that can fossilize. Terpenoids are produced by Gymnosperms (conifers) and Angiosperms. They are composed of ring structures made from isoprene (C5H8) units. Phenolic resins are only produced by Angiosperms. An extinct type of trees called medullosans produced another (7) unique type of resin. The next factor is that the resin needs to be in the right conditions to (8) fossilize Young amber could be transported in seawater (it floats), and then buried under sediment to fossilize. In the Baltics, glaciers knocked down many trees and buried them, allowing them to fossilize. Wet clay and sand (9) Sediments preserve resin well because they don't contain much oxygen and the sediments eventually transform into rocks. Intense pressure and temperatures cause the resin to become a solid orange gem. First molecular polymerization forms copal (young amber) and then the heat and pressure drive out terpenes and complete the amber (10)transformations. Most amber found is about 30-90 million years old, though it's not sure how long the process to turn resin into amber actually takes. The oldest amber discovered is from the Upper Carboniferous, 320 million of years ago. Most ambers are from pine trees or other conifers, though there are a variety of trees that the can come from. However, most amber is from extinct species because the resin was exuded so long ago. bantu jawab Opening/General Statement Explanation Sequence 1 Explanation Sequence 2 Explanation Sequence 3 Closing
Amber is one of nature's gems. Ambers are interesting because they can contain (1) Creatures and plants from millions of years ago. They have also been used in You might have thought that ambers come from (2) tree saps. Actually, they are created from
resins. The difference is that sap transports nutrients around the tree, while resin is semi-solid and acts as a defense response for the plant's immune system. When the tree has a (3) wound (like a broken branch) or if it is attacked by insects or fungi, it exudes thick resin that plugs up the injury and prevents further (4) damage It seals and sterilizes the injury. When resin is secreted, it's not certain that it will be turned into (5) Amber More often than ne it gets weathered away. First of all, the resin needs to be chemically stable and not degrade over time.
It has to be resistant to sun, rain, extreme temperatures, and (6) microorganisms like bacteria and fungi. There are two types of resin produced by plants that can fossilize. Terpenoids are produced by Gymnosperms (conifers) and Angiosperms. They are composed of ring structures made from isoprene (C5H8) units. Phenolic resins are only produced by Angiosperms. An extinct type of trees called medullosans produced another (7) unique type of resin.
The next factor is that the resin needs to be in the right conditions to (8) fossilize Young amber could be transported in seawater (it floats), and then buried under sediment to fossilize. In the Baltics, glaciers knocked down many trees and buried them, allowing them to fossilize. Wet clay and sand (9) Sediments preserve resin well because they don't contain much oxygen and the sediments eventually transform into rocks. Intense pressure and temperatures cause the resin to become a solid orange gem. First molecular polymerization forms copal (young amber) and then the heat and pressure drive out terpenes and complete the amber (10)transformations.
Most amber found is about 30-90 million years old, though it's not sure how long the process to turn resin into amber actually takes. The oldest amber discovered is from the Upper Carboniferous, 320 million of years ago. Most ambers are from pine trees or other conifers, though there are a variety of trees that the can come from. However, most amber is from extinct species because the resin was exuded so long ago.
bantu jawab
Opening/General Statement
Explanation Sequence 1
Explanation Sequence 2
Explanation Sequence 3
Closing
3
1
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Salsabila M
Community
14 Mei 2024 00:46
<p>Opening/General Statement:<br>Amber, one of nature's gems, holds a fascinating history that spans millions of years. From its origins as resin secreted by trees to its transformation into a solid gemstone, the journey of amber is both intriguing and remarkable.</p><p>Explanation Sequence 1:<br>Amber is formed from resin, not tree sap, as it is commonly believed. Resin, which is semi-solid, acts as a defense mechanism for plants, sealing wounds and protecting against damage from insects or fungi. When resin is secreted, it may eventually fossilize under specific conditions.</p><p>Explanation Sequence 2:<br>For resin to fossilize and become amber, several factors must align. Firstly, the resin must be chemically stable and resistant to degradation from environmental factors such as sunlight, rain, extreme temperatures, and microorganisms. Two types of resin, terpenoids and phenolic resins, produced by different plant species, have the potential to fossilize.</p><p>Explanation Sequence 3:<br>The fossilization process of resin involves burial under sediment, where the resin is preserved in an oxygen-depleted environment. Over time, intense pressure and temperatures transform the resin into copal, a young form of amber, and eventually into solid amber through molecular polymerization and the expulsion of terpenes.</p><p>Closing:<br>Amber, with its ability to encapsulate creatures and plants from ancient times, serves as a window into the past. Its formation process, involving the resilience of resin and the geological transformations it undergoes, highlights the intricate workings of nature over millions of years.</p>
Opening/General Statement:
Amber, one of nature's gems, holds a fascinating history that spans millions of years. From its origins as resin secreted by trees to its transformation into a solid gemstone, the journey of amber is both intriguing and remarkable.
Explanation Sequence 1:
Amber is formed from resin, not tree sap, as it is commonly believed. Resin, which is semi-solid, acts as a defense mechanism for plants, sealing wounds and protecting against damage from insects or fungi. When resin is secreted, it may eventually fossilize under specific conditions.
Explanation Sequence 2:
For resin to fossilize and become amber, several factors must align. Firstly, the resin must be chemically stable and resistant to degradation from environmental factors such as sunlight, rain, extreme temperatures, and microorganisms. Two types of resin, terpenoids and phenolic resins, produced by different plant species, have the potential to fossilize.
Explanation Sequence 3:
The fossilization process of resin involves burial under sediment, where the resin is preserved in an oxygen-depleted environment. Over time, intense pressure and temperatures transform the resin into copal, a young form of amber, and eventually into solid amber through molecular polymerization and the expulsion of terpenes.
Closing:
Amber, with its ability to encapsulate creatures and plants from ancient times, serves as a window into the past. Its formation process, involving the resilience of resin and the geological transformations it undergoes, highlights the intricate workings of nature over millions of years.
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