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GCSE: The Earth and Beyond

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  • Marked by Teachers essays 5
  • Peer Reviewed essays 24
  1. Marked by a teacher

    Stars, Supernova and Black holes

    4 star(s)

    The sun is a star, like the other stars it is a ball of very hot gas. The sun gives us huge amounts of energy into space. The energy that keeps the sun shining is produced in its centre or core. The pressure in the core is enormous, and the temperature reaches 15 million degrees centre grade. Under these conditions, atoms of hydrogen gas join together to form another gas called helium. This process is called nuclear fusion. The sun is a very important star in the sky, the sun not only lights and heats the earth and it is in the centre of the solar system with the planets orbiting around it.

    • Word count: 809
  2. Marked by a teacher

    'Sheenagh Pugh presents us with a Sad View of the Future and a Grim Warning of What Could Be. Discuss How She Does This, Paying Particular Attention to the way She Uses Mood and Language and how She Organizes the Poem.'

    4 star(s)

    The poem is set out as 24 short-worded lines and is also written in a free-flowing verse just like 'Do you think we'll ever get to see earth sir?'. The poem creates a sad atmosphere, by using phrases such as 'not back to port'. This shows that they, the survivors, are trying not to feel sad and are not looking back. They are looking forward to the place that they are going and the future that they will have. In line 2, one of the survivors says 'at least that was the name scratched on the smooth door', which creates sound in the poem - sibilance - the use of the 's' on 'scratched' and 'smooth'.

    • Word count: 1823
  3. Marked by a teacher

    My project this year is based on the solar system. In my project I will discuss the theory behind the start of the solar system. I will also describe the sun and planets moving round it.

    4 star(s)

    It is also possible that the planets were never a part of the hot Sun itself. They may have come from the remainder of an exploding star (supernova) that happened near the Sun. The planetary orbits are elliptical in shape and all lie in one plane except Mercury and Pluto whose orbits are tilted at an orbit of 7?and 17?. All the planets move the same direction. Asteroids and comets move in a completely different plane. Planets are recognised in the night sky because they shine with a steadier light than the twinkling stars.

    • Word count: 4431
  4. Peer reviewed

    Concepts of the universe creation

    4 star(s)

    In 1965, Radioastronomers Arno Penzias and Robert Wilson discovered a 2.725 degree Kelvin (-454.765 degree Fahrenheit, -270.425 degree Celsius) Cosmic Microwave Background radiation (CMB) which pervades the observable universe. This is thought to be the remnant which scientists were looking for. Penzias and Wilson shared in the 1978 Nobel Prize for Physics for their discovery. * Finally, the abundance of the "light elements" Hydrogen and Helium found in the observable universe are thought to support the Big Bang model of origins.

    • Word count: 1426
  5. Peer reviewed

    To determine the refractive index of glass

    4 star(s)

    The table should contain 8 rows excluding the column titles. 2. The rectangular prism is placed at the middle of the top of the page and its perimeter is traced with the help of the ruler and pencil. The normal is soon after marked out in the approximate centre of the perimeter using the protractor at the 90 degrees point. The operation is then repeated at the middle of the bottom of the page and finally to the back of the page.

    • Word count: 560
  6. Peer reviewed

    The Life Cycle of the Stars

    4 star(s)

    In the Hierarchy of the universe, stars play an important role. They are huge bodies that have come into being from great clouds of light elements, either with the stars forming simultaneously, or in later evolution of the galaxies. When a star is born out of enormous clouds of gas and dust, they come together into a gigantic ball. Then there is the pressure from all the gas and dust banging into each other and it can reach millions of degrees in temperature.

    • Word count: 1184
  7. Peer reviewed

    Solar Energy

    4 star(s)

    In this essay I will explain how we humans take the use of solar energy. The advantages and drawbacks of this energy and how essential and useful solar energy is to our modern global society. Solar Thermal Energy Form of Energy: Thermal energy This energy is used for: Cooking/Heating, Drying/Timber seasoning, Distillation, Electricity/Power generation, Cooling, Refrigeration, Cold storage Some of the gadgets and other devices: Solar cooker, Flat plate solar cookers, Concentrating collectors, Solar hot water systems (Domestic and Industrial), Solar pond, Solar hot air systems, Solar Dryers, Solar timber kilns, solar stills, Solar photovoltaic systems, Solar pond, Concentrating collectors,

    • Word count: 1670
  8. Peer reviewed

    What types of problems and effects are been forced upon the planet with modern technology and the increasing population and what can be done to make the planet healthier?

    4 star(s)

    Paper which is made from trees should not be wasted and recycled when finished with. In order to prevent unnecessary usage of the planets resources' recycling helps to curb the effects of deforestation. Whenever a person uses a car or forgets to switch their television off at the mains, leaving the little red light to waste energy, a thought should be spared for the millions of men women and children that survive every day in third world countries who have quite possibly never seen a television. If every commuter car in the U.S. transported an extra person, it would save eight billion gallons of fuel a year.

    • Word count: 1295
  9. Peer reviewed

    Is the human race on a collision course for its own destruction’?

    4 star(s)

    This fact maybe false by religious standards but it is the most likely solution to the problem of how we came to be. For Christian people we were came to be by an omnipotent being that took out the time to create two people, Adam and Eve, and I think that this is a good example of peoples delusions of supremacy. For thousands of years now man and woman have played an overwhelming part in the development of this planet usually with the misconception that Earth is theirs and theirs alone and everything else is just here for are needs.

    • Word count: 671
  10. Peer reviewed

    The planets and the universe

    4 star(s)

    The sun was formed from a large blob at the center of a cloud. As time passed bye the sun became large enough to collect most of the hydrogen gas surrounding it and to pull smaller objects into orbit. Deep inside the blob the gases became more and more squashed. Eventually, the pressure and temperature became high enough to push hydrogen nuclei together to form helium nuclei. This process is called Nuclear Fusion and it releases a huge amount of energy. Once nuclear fusion has started, the blob had become a star-the sun. How a star is formed Stars are formed from massive clouds of dust and gas in space.

    • Word count: 945
  11. Peer reviewed

    Astronomical observation

    4 star(s)

    2.Describe the observed motion of the sun in the sky each day, and how this varies over the year, at different latitudes. From the earth the sun is seen to rise in the east, arc across the sky, and set in the west. However this is only an apparent motion, which happens because the earth spins on its axis from west to east.

    • Word count: 374

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