i have 2 7th grade science questions i need answered involving Biology

Physics
Tutor: None Selected Time limit: 1 Day

#1 Suppose that the local temperature changes in favor of greater oxygen levels in the water. Write a short paragraph to describe how both the population of the small fish species and the wading bird population would change in response to the new oxygen levels over the next six months. Then explain why these changes occur.

#2 Compare renewable and nonrenewable energy sources, and discuss the effects on each biodiversity.
Thanks!
May 22nd, 2015

1JUST A MIN and i will deliver the work


May 22nd, 2015

Okay, Thank You

May 22nd, 2015

1. CHANGES THAT MAY OCCUR TO FISH AND BIRD POPULATION  AND REASONS BEHIND IT

Low level of oxygen  reduces the mortality rate of  fish and wading birds by approximately 50% by six months.Their population will change affecting the survival  of small fishes and birds and also affecting deeply on growth of big fish in water.Small amount of oxygen in water means that the act of conversion of gases is impaired, meaning the process of  conversion of oxygen to carbon dioxide is  slow and thus reduce the activeness of energy and growth enhancement in the organism.I am trying to mean that high supply of oxygen will increase the survival and  thus from the question above its evident that the population of fish will increase in population by 50% in the next six months


2 RENEWABLE AND NON RENEWABLE ENERGY

Renewable energy is energy which can be renewed  while non renewable is the one which cannot be renewed

Renewable are like the sun ,waves and heat of earth, they are carbon neutral and do not produce greenhouse effect thus less harmful to environment,its disadvantages are wind needs a lot of turbines to function

Renewable is cheap to acquire unlike non renewable which needs  finances and maintenance like hydro power. 

May 22nd, 2015
Renewable energy is the energy which is generated from natural sources i.e. sun, wind, rain, tides and can be generated again and again as and when required
ADVANTAGES OF RENEWABLE ENERGY

  • The sun, wind ,geothermal are available in the abundant quantity and free to use.
  • The non-renewable sources of energy that we are using are limited and are bound to expire one day.
  • Renewable sources have low carbon emissions, therefore they are considered as green and environment friendly.
  • Renewable helps in stimulating the economy and creating job opportunities. The money that is used to build these plants can provide jobs to thousands to millions of people.
  • You don’t have to rely on any third country for the supply of renewable sources as in case of non-renewable sources.
  • Renewable sources can cost less than consuming the local electrical supply. In the long run, the prices of electricity are expected to soar since they are based on the prices of crude oil, so renewable sources can cut your electricity bills.
  • Various tax incentives in the form of tax waivers, credit deductions are available for individuals and businesses who want to go green.

DISADVANTAGES

  • It is not easy to set up a plant as the initial costs are quite steep.
  • Solar system can be used during the day time and not during night or rainy season.
  • Geothermal energy which can be used to generate electricity has side effects too. It can bring toxic chemicals beneath the earth surface onto the top and can create environmental changes.
  • Hydro power provide pure form of energy but building dams across the river which is quite expensive can affect natural flow and affect wildlife.
  • To use wind energy, you have to rely on strong winds therefore you have to choose suitable site to operate them. Also, they can affect bird population as they are quite high.


They are called non-renewable because they cannot be re-generated within a short span of time. Non-renewable sources exist in the form of fossil fuels, natural gas, oil and coal.

ADVANTAGES OF NON RENEWABLE

  • Non-renewable sources are cheap and easy to use. You can easily fill up your car tank and power your motor vehicle.
  • You can use small amount of nuclear energy to produce large amount of power.
  • Non-renewable have little or no competition at all. For eg: if you are driving a battery driven car your battery gets discharged then you won’t be able to charge it in the middle if the road rather it is easy to find a gas pumping station.
  • They are considered as cheap when converting from one type of energy to another.

DISADVANTAGES

  • Non-renewable sources will expire some day and we have to us our endangered resources to create more non-renewable sources of energy.
  • The speed at which such resources are being utilized can have serious environmental changes.
  • Non-renewable sources release toxic gases in the air when burnt which are the major cause for global warming.
  • Since these sources are going to expire soon, prices of these sources are soaring day by day.

GOOD LUCK

May 22nd, 2015

Amazing work! thanks so much

May 22nd, 2015

I DELIVER  QUALITY WORK , IF YOU HAVE ANY  HOMEWORK PLEASE MAKE ME YOUR GUARANTEE TUTOR.

May 22nd, 2015

Sure thing thank you again 

May 22nd, 2015

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