<span>Scientists choose where are units of time began and ended based on major changes in life forms at certain times</span>
Answer:
Carbon dioxide from volcanic activity became a major part of the atmosphere.
Explanation:
<u>Answer:</u>
All of the above mentioned options can be used by scientists to date the sediment layer they are found in.
<u>Explanation:</u>
- Rock fossils, animal fossils, etc.found in the sediment layer can be used to determine the age of the sediment based on the period of the existence of that animal or the period of formation of the rock.
- Tree rings clearly exhibit the age of the tree. Hence, a sediment layer with the evidence of tree rings can tell the age of the sediment layer.
- An amalgamation of the data obtained from the animal growth rings and the period of existence of that specific animal species can be used to calculate the age of the sediment.
- The intensity of radioactivity left in the isotopes clarifies how old the isotope is.
- The age of mineral elements can be determined exactly with the help of processes like Potassium-Argon dating, Uranium-Lead dating, etc.
- Thus it would be easy to determine the age of the sediment layer containing mineral elements.
I am pretty sure it is Dallas
Answer:
Rising ocean temperatures will influence reef species to move to another area that has cooler areas.
Pollution will create dead zones where there are little to no wildlife. Material pollution like plastic will also kill marine life.
Human interference can affect the ecosystems by polluting, overfishing, and destroying coral.
Explanation:
Some marine life are not suitable to warm temperatures, and this will cause them to move to cooler ones, disrupting the normal balance the ecosystem once had.
Pollution from fertilizer runoff and others can deplete the oxygen in the water, and animals like turtles believe plastic is food and will kill them by destroying internal organs and blocking intestines.
Humans pollute and overfish, and this throws the ecosystems off balance because it will create dead zones and will significantly decrease the amount of wildlife there. Humans also destroy coral, which will make reefs die and destroy habitats for wildlife.
