Answer:
1. Radiometric dating
2. Relative dating is used to determine the age of fossils or rock layers by by comparing it to similar rocks and fossils of known ages.
3. The youngest rock layers are at the top and the oldest are at the bottom, which is according to the law of superposition.
4. Tribolite and Pecten fossils
Fossils are used to determine the ages of rock layers. Index fossils are the most useful in determining relative aging. Index fossils are of organisms that lived for a short period of time. An index fossil allows a scientist to determine the age of the rock it is in. So if they are found in a particular age, it means they belong in that age.
5. Scientists commonly use radioactive dating methods by using radioactive decay cloak of certain elements such as potassium or carbon to date fossils or rocks.
6. Law of superposition because in terms of finding the age of the rock as an object, all that needs to be identified are the layers of the rock.
7. The nuclear decay of radioactive elements are a process that behaves in a clock-like fashion which makes it a useful tool for determining the exact age of fossils or rocks.
Answer:
The moon isn't visible on the left side. There is a shadow on the left side on the sphere. The light or sun is casting down reflecting light of the right side of each surface.
Explanation:
The original source of phosphorus in a terrestrial ecosystem is soil microorganisms. soil becomes deficient in phosphorous leading to ecosystem retrogression. phosphorous can be found in our body, it builds strong bones and teeth.
hope it helps!
This blockage will likely increase the resistance to flow in his circulatory system, and as a result will decrease the rate of blood flow.
Blood vessels in the circulatory system transport blood away from and towards the heart. Arteries transport blood away from the heart, while veins transport blood back to the heart. The circulatory system transports oxygen, nutrients, and hormones to cells while also removing waste products such as carbon dioxide.
Vascular disease (vasculopathy) affects the blood vessels that transport oxygen and nutrients throughout your body and remove waste. Plaque (made of fat and cholesterol) slows or blocks blood flow inside your arteries or veins, causing common vascular problems. When there is too much cholesterol in the blood, the cholesterol and other substances can combine to form deposits (plaques) on the artery walls. Plaques can cause an artery to narrow or become blocked.
To learn more about circulatory system, here
brainly.com/question/3305440
#SPJ4
genes control traits so when a gene is changed the trait changes
A
