1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MariettaO [177]
2 years ago
8

What happens when sand and gravel roll along a river bed?

Biology
1 answer:
Alenkinab [10]2 years ago
8 0
It serves as a barrier to biological activity. 
You might be interested in
What do you mean by environmental degardation?​
sashaice [31]

Answer:

if you mean environmental degradation it is where the environment deteriorates(gets worse).

Explanation:

this happens through lack of air,water and soil, destruction of ecosystems and habitat destruction

5 0
3 years ago
Read 2 more answers
The medical specialist that frequently determines the cause of death is the
Ad libitum [116K]
Answer:  board-certified "pathologist" (physician).
_________________________________________________
6 0
2 years ago
Which of these statements best describes a similarity between photosynthesis and dissolving in the sea?
Mama L [17]

The correct answer is D. Both absorb carbon dioxide from the atmosphere.

The process of photosynthesis is carried out using atmospheric carbon dioxide by green plants. Many gases including carbon dioxide are dissolved in seawater. Some of the carbon dioxide gas remains in dissolved state but most of the carbon dioxide is reacts with water to form carbonic acid. Dissolved gases in seawater make balance with atmosphere by mixing of the surface by wind and waves. Therefore, both photosynthesis and sea water take carbon dioxide from the atmosphere.  

8 0
3 years ago
¿Qué se puede agregar a un átomo para hacer que un electrón sin valencia en el átomo se convierta temporalmente en un electrón d
NNADVOKAT [17]

Energía.

Explicación:

Generalmente, los electrones giran continuamente en las capas de los átomos. Si estos electrones se encuentran en las capas más externas de un átomo, se denominan electrones de valencia.

Son necesarios para las reacciones químicas de un átomo en particular con otro, a través de sus pérdidas o compartidas.

En los átomos sin valencia, sus capas más externas no tienen electrones en sus capas más externas, tales átomos son estables.

Sin embargo, si se suministra cierta cantidad de energía a dicho átomo, el electrón gana energía y, por lo tanto, se excita.

Por lo tanto, se mueven de niveles de energía más bajos a niveles de energía más altos, y hacen que el átomo sin valencia se convierta en valencia temporalmente, a medida que se mueven hacia la capa más externa.

Answer:

Energy.

Explanation:

Generally, electrons revolves continuously in the shells of  atoms.if these electrons are located in the outer most shells of an atom,they are refereed to as the Valence electrons.

They are needed for chemical reactions of a particular atom with another,through their loses or sharing.

In Non -valence atoms their outermost shells do not have electrons at their outermost shells,such atoms are stable.

However, if  certain quantity of energy is supplied  to  such atom, the electron  gains energy and therefore becomes excited.

They therefore move from lower energy levels to higher energy levels,and makes the non- valence atom becomes valence temporarily, as they move into the outermost shell.

5 0
3 years ago
What are all of the energy transformations that take place as sunlight is converted to usable energy within humans
Charra [1.4K]
<span>The energy transformation in the sun is primarily the change of nuclear energy to light energy. 

More Explainable: </span><span>The sun is said to "burn hydrogen" but what that really means is that near the center of the sun there is enough temperature and pressure to cause the fusion of hydrogen nuclei (protons) into helium nuclei (two protons and two neutrons). The fusion (not fission) reaction energy give off energy in a complex way that includes heat and light. The light works its way out from the center of the sun to the surface and eventually out of the surface into space. That is the sunlight we see as well as some light that is outside our range of vision. The light is electromagnetic energy. </span>
4 0
3 years ago
Other questions:
  • A fossil is found to have a 14c level of 67.0% compared to living organisms. how old is the fossil?
    11·1 answer
  • scientists have found that although plants require light to carry on photosynthesis Very high levels of sunlight can kill some p
    9·1 answer
  • The _______________ completely covers the surface of the protoplasm.
    8·1 answer
  • Which of these plant hormones is associated with the spoilage of a bushel of apples?
    15·1 answer
  • All fungi are
    9·1 answer
  • Unlike other animals, mammals can perspire. The main benefit of perspiring is that it -
    13·1 answer
  • A group of similar cells that perform a similar function is called a(n)
    15·1 answer
  • if two black mice are crossed, the resulting offspring are as follow: 10 black mice and 3 white, what are the genotype of the pa
    8·1 answer
  • How is each cell like a big city?
    8·1 answer
  • SECTION C
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!