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3 years ago

Why are there fewer organisms in each level as you go up the energy pyramid

1 answer:

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Explanation: The energy pyramid describes how energy gets distributed through an ecosystem. The more there is of an organism on the energy pyramid, the more it gives overall to the ecosystem. The less there is of an organism, the less it gives to the ecosystem. Take the Floridian Everglades as an example. There is an abundance of sawgrass, and that makes up the foundation of the system, along with mangroves and such. But there are less of predators in the ecosystem because they only feed of of their prey like small mammals or fish. They never start the food chain, they end it.

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Which processes are caused by convection currents in the mantle? Check all that apply.

trapecia [35]

Answer:

slab push, volcanic eruptions, and subduction

Explanation:

To understand better, let's consider an example. Make small pieces of paper and put them in a bowl containing water. Then heat the bowl. After sometime, you will see that the pieces are moving. This is because of same phenomenon (convection currents) forming inside the bowl of water. The water will warm move upward whereas colder water will come to its place. Convection currents in Earth are formed due to high temperature of magma (molten rock material) that rises up and colder magma takes its position.

This process results in slab push, volcanic eruptions, and subduction.

Slab pull: Slab pull is the force exerted by plates during subduction. Subduction is a process when a denser plate moves beneath the less denser plate. Thus slab pull is also caused by convenction currents.

Volcanic eruption: During subduction, denser plate moves beneath the less denser plate until it reaches magma. There, the lithosphere destroyes. On a weaker lithosphere zone, the magma moves upward and break the crust thus leading to volcanic eruptions.

Subduction: As mentioned above, during subduction, denser plate moves beneath the less denser plate which is driven by convectin currents.

5 0

3 years ago

Read 2 more answers

In a _______________________ av junction, the impulse will reach the atria and the ventricles simultaneously, so the p wave is h

professor190 [17]

In a mid-av junction, the impulse will reach the atria and the ventricles simultaneously, so the p wave is hidden by the complex.

The definition of an urge is a strong or unexplained urge. An example of an urge is when you have the urge to go to Vegas. An example of an impulse is buying something without thinking. noun.

An urge is a sudden desire to do something. Unable to contain his impulses, he stared at the sea again. An impulse buys, or impulse buy, is something you didn't plan on doing but decided to do when you saw it. For a constant force, the momentum of a force is the product of the resulting force ΣF and the duration of that force Δt. The force impulse is the cause of the change in movement and therefore the change in impulse.

Learn more about impulse here

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6 0

1 year ago

How do mutations affect an organism? A. they may cause the development of a disease-causing allele B. they may cause the develop

lubasha [3.4K]

The answer is D. All of the above

5 0

2 years ago

What happens to cells when they contian lead?

Fed [463]

They would get poisoned making your blood poisoned

7 0

3 years ago

Write a 600 word report discussing nuclear reactors. The report should include a description of the way a reactor works and the

barxatty [35]

Answer:

Explanation:

A nuclear reactor is an installation capable of initiating, maintaining and controlling the chain fission reactions that take place in the reactor core, consisting of the fuel, coolant, control elements, structural materials and moderator in the case of nuclear thermal reactors.

The core is the part of the reactor where the nuclear chain reaction is produced and maintained.

Components of the core:

The fuel of a nuclear reactor is fissionable material.

Control rod beams provide a rapid means of controlling the nuclear reaction, allowing rapid changes in reactor power and eventual shutdown in case of emergency.

The neutrons produced in fission have a high energy in the form of velocity. Their speed should be reduced to increase the probability of other atoms fissioning and not to stop the chain reaction. This is achieved by elastic collisions of the neutrons with the nuclei of the moderator.

Most of the energy released by fission is in the form of heat. To be able to use this, a refrigerant must pass through the interior of the reactor that absorbs and transports this heat.

In a nuclear chain reaction, a certain number of neutrons tend to escape from the region where it is produced. This neutron leakage can be minimized by the existence of a reflecting medium, thus increasing the efficiency of the reactor.

When the reactor is in operation, a large amount of radiation is generated. Protection is needed to isolate the installation workers from radiation caused by fission products. Therefore, a biological shield is placed around the reactor to intercept these emissions.

A breeder reactor is a nuclear reactor that generates more fissile material in the fuel than it consumes. Considered highly attractive because of their superior fuel economy: a normal reactor consumes less than 1% of the natural uranium that starts the fuel cycle, while a 'breeder' can burn it almost completely. It also generates less waste for the same amounts of energy. Breeders can be designed to use thorium, which is more abundant than uranium. Currently, there is renewed interest in both breeder designs due to the increased price of natural uranium.

All commercial reactors breed fuel, but they have low (though still significant) breeding ratios when compared to machines that are traditionally considered breeders. In recent years, the commercial energy industry has been emphasizing high burn fuels, which last longer in the core of the reactor.

Reproduction of fissile fuel is a common feature in reactors, but commercial reactors are not optimized for this feature which is referred to as improved burning. Up to one-third of all electricity produced in the current U.S. reactor inventory comes from reproducible fuel, and the industry is working hard to increase that percentage over time.

The advantages are:

Generates a large amount of electricity

No production of greenhouse gases

Dependence on oil is reduced

Less damage to the environment

A major disadvantage is the difficult management of the nuclear waste generated.

Nuclear power plants have a limited lifetime. The investment for the construction of a nuclear plant is very high.

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3 years ago

Why are there fewer organisms in each level as you go up the energy pyramid ​

Why are there fewer organisms in each level as you go up the energy pyramid