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Dimas [21]
4 years ago
10

Where did the earth get all of the heavy elements that it is made of?

Biology
1 answer:
ra1l [238]4 years ago
8 0

Answer:

Heavy elements were cooked up in the core of stars during fusion reaction. But elements heavier than Iron were made in supernovas. Our solar system and sun is a third generation star and its planets.so heavy elements came to earth from a past supernova which happened before the formation of earth

Explanation:

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Trees play an important role in the carbon cycle because
MariettaO [177]
Forests exchange large amounts of CO2 and other gases with the atmosphere and store carbon, in various forms, in trees and soils. ... Much of the CO2 in the air above a forest is taken in by trees through the process of photosynthesis,where it becomes one of the building blocks fortree growth or energy for life. (i hope this can help you ):)
4 0
4 years ago
What are the stages of the nitrogen cycle??
ludmilkaskok [199]

Answer:

·        Nitrogen fixation

·        Nitrification

·        Assimilation

·        Ammonification

·        Denitrification

Explanation:

Nitrogen fixation is the process where nitrogen is converting into ammonium.

Nitrification is the process of ammonium oxidation into nitrate.

Assimilation is the process where animals and plants receive NO3. Plants are using this nitrate for proteins and acids.

Ammonification is the process where the nitrate that is contained in plants and animals is recycled after their death.

Denitrification is e the last process in this cycle and during this process nitrate is converting to gases.

5 0
3 years ago
Compare and contrast two of the cycles of matter
Akimi4 [234]
The two cycles of the matter are the carbon and nitrogen cycle. Both of them are biogeochemical cycles, it means that the chemicals spend a portion of the cycle in living things and non-living things. They are also common in that they both recycle nutrients that are essential to all organisms. 

They are different in the manner that they cycle. Nitrogen is huge, 78% of the air around us is nitrogen. It cannot be used by plants or animals. Once the nitrogen is used by the plant and make its way to the animal, it can be released to decomposition. 

Carbon has no requirement in processing by bacteria prior to plants and animals being able to use. Plants take carbon dioxide and make it sugar, animals eat the sugar. Some of it is released carbon dioxide that we exhale.

6 0
3 years ago
Sample Response: The sound of the drumstick hitting the metal bar will get to me in a shorter amount of time in Scenario 1. The
maks197457 [2]

Answer:

The sound will reach my ear in a shorter time in Scenario 1.

The speed of sound waves in solids is faster than it is in gases.

Explanation:

The sound which is produce due to hitting of metal bar with a drumstick reaches to the ears in short time because sound is a longitudinal wave which requires or needs medium for its propagation from one place to another and in solids the particles of medium are close to each other as compared to air so the sound travels faster in solid materials as compared liquid and gases and takes less time to reach my ears.

7 0
4 years ago
The digestive tract lining contains epithelial (outer lining) cells that do not allow food particles to randomly go inside the b
Natasha2012 [34]

Answer:

D) Tight junctions

Explanation:

Based on the information provided within the question it can be said that the structure that performs this function are known as tight junctions. This structure has two different functions. The first being to limit the passage of molecules and ions through the space between cells, and the second function is that is blocks the movement of important membrane proteins between the epithelial cells

6 0
3 years ago
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