Download File - Mr. Hoover's Science Classes - Mr Hoover's ...

Download File - Mr. Hoover's Science Classes - Mr Hoover's ...

UNIT 4: Space and Earth Science Lesson 1 SPACE FLIGHT TO THE STARS Looking Back in Time In all societies, people have looked to the night sky for inspiration, to find

directions, to decide when to plant or harvest crops, or just to appreciate its great beauty Celestial is a term that refers to the sky. Celestial Objects Objects in the sky that we can see The Sun, the Moon, Earth, other planets, and

comets are all examples of celestial objects. Astronomy is the study of the universe and the objects in it. An astronomer is a person who studies astronomy. Speed of light

Light takes time to travel. At short distances, this delay does not make a difference. However, when you are looking out into space, the delays begin to add up. For example, it takes about 1.5 s for the light to reach Earth from the Moon (Figure 7.2). We therefore always see the Moon as it was 1.5 s ago. The planet Jupiter, farther from Earth than the Moon is, appears to us

as it did 45 min before. From Earth to the Stars of the Milky Way The solar system is the Sun together with all the planets and other celestial objects that are held by the Suns gravitational attraction and orbit around it. Among the other

celestial objects in the solar system are moons, comets, and asteroids. The Sun and Inner Solar System The Sun and Inner Solar System The Moon Twelve people have walked on the

Moon, the last time in 1972. With their Apollo spacecraft travelling about 30 times the speed of a jet airplane, the astronauts trip to the Moon took four days. It has no atmosphere and little or no water. As the Moon orbits Earth, it rotates at a speed that keeps the same side always

facing Earth. The Sun and Inner Solar System The Sun A star is a hot ball of plasma, an electrically charged gas, that shines because nuclear fusion is taking place at its core. Nuclear fusion is the process in

which the nuclei of atoms fuse together and form larger atoms. During this process, an enormous amount of energy is released. The Sun and Inner Solar System Other Planets Between the Earth and the Sun are

Mercury and Venus Behind the Earths is Mars which is the last of the 4 rocky planets that make up the inner solar system. Measuring Distances in Space is so huge that the use of

Space kilometres impractical, thus the astronomical unit was created. One astronomical unit (AU) equals the average distance between the Sun and Earth, about 150 million km. Example: Mercury is 0.39 AU from the Sun. Mars is 1.52 AU from the Sun.

Measuring Distances in Outside Space of the solar system AU units become impractical and so distance is measured in light years One light-year (ly) equals the distance that a beam of light can travel through

space in 1 year. It is equivalent to 63 000 AU or 9000 billion km. At the speed of light, you could travel around Earth seven times in 1 s. A trip from the Sun to Neptune at the speed of light takes about 5 h. The Outer Solar System The Outer Solar System

Out past Mars, we encounter the asteroid belt, a region of rocky debris that forms a ring all the way around the Sun at a distance of about 3 AU. The asteroid belt contains billions of pieces of rock of all sizes. Beyond the asteroid belt lie the four gas giant planets: Jupiter, Saturn, Uranus, and Neptune.

The Outer Solar System Jupiter could fit several thousand Earths inside it. The gas giant planets do not resemble Earth at all. Their atmospheres are made mostly of hydrogen and helium. The planet farthest out in the solar system is Neptune, in orbit 30.1 AU away from the Sun.

The Outer Solar System Besides the eight major planets there are other objects such as moons, comets, minor planets such as Pluto, and tiny grains of dust and ice. Some of these objects are held up to 50 000 AU away. To the Stars

The Centauri system (3 stars) is the next closest group of starts to Earth, 4.3 ly away. To the Stars A system with two stars is called a binary system.

To the Stars The title of brightest star visible from Earth goes to Sirius, even though it is nearly twice as far from us as the Centauri system is. Sirius is brighter because it is a different kind of star than the Centauri stars. Sirius is about twice the mass of our Sun.

Exploding Stars When a star explodes, it is called a supernova. The gradual build-up of heavy elements in the star's centre causes the core to collapse. The outer layers of the star are pulled into the core by gravity. As the outer material crashes into the inner core, the temperature and pressure increase and the star explodes.

Exploding Stars High pressures and temperatures created during the supernova explosion lead to the formation of new elements. As the star rips apart, debris from the explosion provides the matter for another type of celestial object, a

nebula. A nebula is a large cloud of dust and gas. Nebulae are often called star nurseries, because it is from their dust and gas that stars develop. Currently, about one supernova a week is detected by telescopes that are based in orbit and can scan deep

space The Milky Way The group of stars in our galactic home is called the Milky Way. We cannot see the entire Milky Way directly because the solar system is inside it. The shape of it is sort of like a pinwheel. A galaxy with this shape is known as a spiral

galaxy. Other shapes of Galaxies - Barred spiral Elliptical Galaxies Irregular Galaxies Scientific Notation

Scientific notation helps to make very large numbers shorter and easier to handle. Scientific notation is based on powers written using the base number 10. For instance, using scientific notation to write the number 321 000 000 000 results in 3.21 1011. The first part of the number (in this case, 3.21) is always greater than or equal to 1 but less

than 10. The second part of the number is a power with base 10 and an exponent number (in this case, 11, written in superscript, raised and set up to the right of the 10). Scientific Notation Example: The speed of light is about 299 800 000

m/s. Write this in scientific notation. Step 1: Put a decimal point after the first digit on the left. This gives 2.99 800 000 for the example. Step 2: Count the number of places from the decimal point to the end of the zeros. For 2.99 800 000, there are eight places. This means the power of base 10 has an exponent of 8, written as 108.

Step 3: Delete the zeroes. The number written in scientific notation is 2.998 108 m/s. Write the following numbers in scientific notation: Scientific Notation Complete the scientific notation questions first Then complete the All These Worlds worksheet as a group

Then complete the questions on the note for homework.

Recently Viewed Presentations

  • Jekyll and Hyde - Weebly

    Jekyll and Hyde - Weebly

    Research Lesson! Next term we will be studying The Strange Case of Dr Jekyll and Mr Hyde by Robert Louis Stevenson.. Your challenge today is to undertake research into the novel: the plot, it's key charactersand main themes.. You must...
  • Geology Midterm Review

    Geology Midterm Review

    Arial Calibri Default Design GEOLOGY TEST OUT REVIEW PowerPoint Presentation magnetite galena graphite quartz calcite biotite muscovite halite PowerPoint Presentation HEMATITE Olivine plagioclase K-feldspar (orthoclase) gypsum garnet fluorite chalcedony AMPHIBOLE PYROXENE Amphibole vs. pyroxene IGNEOUS ROCKS GRANITE gabbro rhyolite Rhyolite...
  • Word List Timeline Muawiya ibn 660-750 Umayyad Abi

    Word List Timeline Muawiya ibn 660-750 Umayyad Abi

    Word List Timeline Berbers Visigoths Jabal Tariq (Gibralter) Charles Martel 711-16 Most of Spain taken. 716-17 Last attack on Constantinople. 732 or 733 Franks defeat Muslims at Tours/ Poitiers. Word List Timeline 'Abd al-Malik qadi (judge) jizya (poll tax) 685-705...
  • Protocoles de Population pour Modèles Mixtes à Réponses ...

    Protocoles de Population pour Modèles Mixtes à Réponses ...

    Minimiser la variance d'estimation des paramètres Approches pour évaluation et optimisation de protocole Simulation Longue et coûteuse en temps Limite sur le nombre de protocoles évaluables Approche statistique Matrice d'information de Fisher Limite de ces approches pour modèles non linéaires...
  • FORSYTH COUNTY SCHOOLS CAPITAL PROGRAM LOCATION CONSTRUCTION PROJECT

    FORSYTH COUNTY SCHOOLS CAPITAL PROGRAM LOCATION CONSTRUCTION PROJECT

    forsyth county schools capital program location. construction project. architect. a/e start. gc/cm. open. summary status. high school additions and modifications
  • Presentation title goes here

    Presentation title goes here

    Welcome to All CFAS Attendees! More than 130 people are attending this meeting, including an array of CFAS reps, speakers, AAMC staff, and guests Of CFAS reps, approximately 55 percent are senior reps, and 45 percent are junior reps.
  • ABRASIVE WHEELS - EHS DB.com

    ABRASIVE WHEELS - EHS DB.com

    PORTABLE HANDHELD GRINDER AUTHORISATION TRAINING WELCOME Health and Safety at Work etc. Act 1974 Management of Health of Safety at Work Regulations 1999 Provision and Use of Work Equipment Regulations1998 Noise at Work Regulations 1989 Personal Protective Equipment Regulations1992 HASAWA...
  • Literary Term Inventory - Cardinal Hayes High School

    Literary Term Inventory - Cardinal Hayes High School

    The place from which an author considers things, which shows us the opinion, or feelings of the individuals involved in a situation. In literature, it is the mode of narration that an author employs to let the readers "hear" and...