Video Quiz: EUTROPHICATION (biología - 4 eso - ecology


EUTROPHICATIONVersion en ligne Video about the phenomenom of eutrophization par Pablo González Andrés 1 How does he name the state in which the Gulf of Mexico becomes every summer? a Beautiful Zone b Dead Zone c Incredible Zone 2 The Gulf of Mexico is the only place in the planet in which a "Dead Zone" can be observed... a Yes b No c Incredible Zone 3 Why does he explain how an aquatic ecosystem works? a Because it is beautiful to know it. b Because the knowledge does not occupy space c Because, first, it is necessary to understand how the marine ecosystem works to understand the causes that promote a Dead Zone 4 The only organisms able to carry out photosynthesis are the plants... a Yes b No c Because, first, it is necessary to understand how the marine ecosystem works to understand the causes that promote a Dead Zone 5 Which is the right order of events? a Excess of nutrients-excessive growth of algae and cyanobacteria-dead of seaweeds and aquatic plants-oxygen disappears in water-animals die b Excess of nutrients-oxygen disappears in water-excessive growth of algae and cyanobacteria-dead of seaweeds and aquatic plants-animals die c Oxygen disappears in water-excess of nutrients-excessive growth of algae and cyanobacteria-dead of seaweeds and aquatic plants-animals die 6 Eutrophication happens in a natural way in some areas in the world but, what has it made this phenomenon becomes more frequent and widespread? a It never appears as a natural phenomenon. It always appears because of human activities. b It has not increased its frequency. c It is currently more frequent because of the effect of human activities that dump pollutants to the water masses. 7 Fertilizer used in agriculture is one of the most important pollutants that produces eutrophication. How many states do they empty fertilizer residues to the Gulf of Mexico through the Mississippi River? a 21 b 31 c 41 8 The source(s) of pollutants that are able to produce eutrophication are..... a Only fertilizer used in agriculture b There are thousands of sources, most of them unknown yet. c There are several human activities that produce it. Fertilizer used in agriculture is one of the most important in several places in the world. but not the unique. 9 Solutions for eutrophication: a We know how avoiding it but it is impossible to be carried out b It is easy to solve if we want c It is difficult to repair and prevent but we must do it Explanation 1 He says that the Gulf of Mexico is full of life, but every May all the species that are able to swim go away and the other ones, which are not able to do it, die. 2 No, there are several places throughout the world in which this phenomenon happens. 3 To understand how solving a problem that appears in an ecosystem, it is necessary firstly to understand how it works. 4 There are several organisms that can carry out photosynthesis. Algae and a particular bacterium, called cyanobacteria, are able to carry out it. Eutrophication is an alteration of aquatic ecosystems produced by the excessive growth of algae and cyanobacteria because of an excess of nutrients, like phosphorus and nitrogen, in the water. 5 The order of events is: the excess of nutrients (P and N) makes algae and cyanobacteria grow a lot. Because of it sunlight is not able to reach the bottom of the water mass. So, seaweeds and aquatic plants, which are in the bottom, die. It makes the level of oxygen in the water descent. Additionally, they are decomposed by aerobic organisms that consume oxygen to decompose dead seaweeds and aquatic plants. It makes that the level of oxygen descents even more. Eventually, living beings that need oxygen to live (animals) die suffocated. Since these dead organisms must also be decomposed, it becomes in a vicious circle that aggravates the problem. 6 Eutrophication can appear like a natural phenomenon some times and, in these cases, there are species naturally adapted to such conditions. However, human activities that dump its residues to lakes, river or the sea have increased the frequency and the locations where it is observed. 7 Fertilizers are rich in Phosphorus and Nitrogen. If farmers apply more amount than the crops need for growing, the excess will go to the aquatic masses when raining. If the supplement is apply in a wrong moment (for example when it is raining) it can end in the water masses too. The problem is much more complex to solve because the amount of fertilizer that a soil can accept is different depending on several factors such as pH, texture, etc... 8 Any source that dumps organic compounds that favors the growth of algae and cyanobacteria is able to make eutrophication appear. There are two key elements to consider when we study the possible sources: phosphorus and nitrogen. 9 There are several solutions that can prevent it. The difficulty is that there are several sectors or the population that must collaborate all together.

1

How does he name the state in which the Gulf of Mexico becomes every summer?

a

Beautiful Zone

b

Dead Zone

c

Incredible Zone

2

The Gulf of Mexico is the only place in the planet in which a "Dead Zone" can be observed...

a

Yes

b

No

c

Incredible Zone

3

Why does he explain how an aquatic ecosystem works?

a

Because it is beautiful to know it.

b

Because the knowledge does not occupy space

c

Because, first, it is necessary to understand how the marine ecosystem works to understand the causes that promote a Dead Zone

4

The only organisms able to carry out photosynthesis are the plants...

a

Yes

b

No

c

Because, first, it is necessary to understand how the marine ecosystem works to understand the causes that promote a Dead Zone

5

Which is the right order of events?

a

Excess of nutrients-excessive growth of algae and cyanobacteria-dead of seaweeds and aquatic plants-oxygen disappears in water-animals die

b

Excess of nutrients-oxygen disappears in water-excessive growth of algae and cyanobacteria-dead of seaweeds and aquatic plants-animals die

c

Oxygen disappears in water-excess of nutrients-excessive growth of algae and cyanobacteria-dead of seaweeds and aquatic plants-animals die

6

Eutrophication happens in a natural way in some areas in the world but, what has it made this phenomenon becomes more frequent and widespread?

a

It never appears as a natural phenomenon. It always appears because of human activities.

b

It has not increased its frequency.

c

It is currently more frequent because of the effect of human activities that dump pollutants to the water masses.

7

Fertilizer used in agriculture is one of the most important pollutants that produces eutrophication. How many states do they empty fertilizer residues to the Gulf of Mexico through the Mississippi River?

a

21

b

31

c

41

8

The source(s) of pollutants that are able to produce eutrophication are.....

a

Only fertilizer used in agriculture

b

There are thousands of sources, most of them unknown yet.

c

There are several human activities that produce it. Fertilizer used in agriculture is one of the most important in several places in the world. but not the unique.

9

Solutions for eutrophication:

a

We know how avoiding it but it is impossible to be carried out

b

It is easy to solve if we want

c

It is difficult to repair and prevent but we must do it

Explanation

1

He says that the Gulf of Mexico is full of life, but every May all the species that are able to swim go away and the other ones, which are not able to do it, die.

2

No, there are several places throughout the world in which this phenomenon happens.

3

To understand how solving a problem that appears in an ecosystem, it is necessary firstly to understand how it works.

4

There are several organisms that can carry out photosynthesis. Algae and a particular bacterium, called cyanobacteria, are able to carry out it. Eutrophication is an alteration of aquatic ecosystems produced by the excessive growth of algae and cyanobacteria because of an excess of nutrients, like phosphorus and nitrogen, in the water.

5

The order of events is: the excess of nutrients (P and N) makes algae and cyanobacteria grow a lot. Because of it sunlight is not able to reach the bottom of the water mass. So, seaweeds and aquatic plants, which are in the bottom, die. It makes the level of oxygen in the water descent. Additionally, they are decomposed by aerobic organisms that consume oxygen to decompose dead seaweeds and aquatic plants. It makes that the level of oxygen descents even more. Eventually, living beings that need oxygen to live (animals) die suffocated. Since these dead organisms must also be decomposed, it becomes in a vicious circle that aggravates the problem.

6

Eutrophication can appear like a natural phenomenon some times and, in these cases, there are species naturally adapted to such conditions. However, human activities that dump its residues to lakes, river or the sea have increased the frequency and the locations where it is observed.

7

Fertilizers are rich in Phosphorus and Nitrogen. If farmers apply more amount than the crops need for growing, the excess will go to the aquatic masses when raining. If the supplement is apply in a wrong moment (for example when it is raining) it can end in the water masses too. The problem is much more complex to solve because the amount of fertilizer that a soil can accept is different depending on several factors such as pH, texture, etc...

8

Any source that dumps organic compounds that favors the growth of algae and cyanobacteria is able to make eutrophication appear. There are two key elements to consider when we study the possible sources: phosphorus and nitrogen.

9

There are several solutions that can prevent it. The difficulty is that there are several sectors or the population that must collaborate all together.

EUTROPHICATION

Video Quiz

Téléchargez la version pour jouer sur papier

Créé par

Top 10 résultats

Top Jeux

Video Quiz

Music genres

Video Quiz

Why do cats "knead"?

Video Quiz

Watch the video and answer the questions!

Video Quiz

History of Dutch's cycle paths

Video Quiz

Watch the following video and answer questions.

EUTROPHICATIONVersion en ligne

par Pablo González Andrés

How does he name the state in which the Gulf of Mexico becomes every summer?

The Gulf of Mexico is the only place in the planet in which a "Dead Zone" can be observed...

Why does he explain how an aquatic ecosystem works?

The only organisms able to carry out photosynthesis are the plants...

Which is the right order of events?

Eutrophication happens in a natural way in some areas in the world but, what has it made this phenomenon becomes more frequent and widespread?

Fertilizer used in agriculture is one of the most important pollutants that produces eutrophication. How many states do they empty fertilizer residues to the Gulf of Mexico through the Mississippi River?

The source(s) of pollutants that are able to produce eutrophication are.....

Solutions for eutrophication:

Explanation