Tugasan 2 new

Tugasan 2 new

• 1.
  Science Year 4 Unit6 : The Earth And The Universe Lesson 1 : Our Solar System The Universe The Earth
• 2.
  Our SOlar SYStem Inner Planets Mercury Venus Earth Mars Neptune Sun Uranus Outer Asteroid Belt Planets Saturn Comet Jupiter
• 3.
  the Sun Corona Convection Zone  Is a star, a hot ball glowing gases at the heat of solar Radiation Zone system.  Largest object in the solar Core system. Photosphere  Without the sun’s intense energy and heat, there would be no life on Earth.
• 4.
  mercurY  Closestplanet to the Sun.  The Smallest planet in the solar system. 。 。  Heavily cratered surface can reach 801 F ( 427 C )  No atmosphere to trap the heat, 。 。 night time temperatures plummet to -279 F ( -173 C )
• 5.
  VenuS ( earth’S SiSterplanet)  Similar to Earth in size and mass.  Its atmosphere is primarily carbon dioxide.  Permanent blanket of clouds traps heat, creating surface temperatures hot.  Reflective cloud cover makes it the brightest.
• 6.
  earth ( the bigblue marble )  The only planet to support life.  Is a complex system of air, water, and land.  Thin and dynamic veil of atmosphere.  Rapid spin and molten nickel-iron core give rise to a magnetic field.
• 7.
  marS ( the red planet)  Rocky planet’s surface has seen volcanoes, meteor impacts, shifting tectonic plates, and huge dust storms.  Seasonal temperature fluctuations. Jupiter ( the giant )  Largest planet.  Mainly hydrogen and helium atmosphere resembles that of our sun.
• 8.
  Saturn ( theringed planet )  Gas giants.  Made of hydrogen and helium.  Has 3 wide rings. uranuS ( the blue planet )  Spins on a axis that often points directly at the sun.  Methane gas in its atmosphere.
• 9.
  neptune ( the OutermOSt planet )  Bright blue coloring from methana gas in its atmosphere. plutO ( celeStial SnOwballS )  Dwarf Planets.  In 2006, petite Pluto was stripped of its planet status and down graded to dwarf planet.
• 10.
  aSterOid belt  Between Mars and Jupiter. aSterOid  Chunks of rock that travel around the sun.
• 11.
  cOmet  Balls of rock and ice that grow tails as they approach the sun.  Gas and dust are expelled and trail behind them as it heat up. meteOr  Tiny rocks which probably come from the asteroid belt.  Meteorite impacts velocities. meteOrite impactS VelOcitieS
• 12.
  Distance from Sun Mass of Planet Time for 1 Orbit of Sun Planet ( million Km ) ( x1022 kg) ( days ) Mercury 58 33 88 Venus 108 487 224.7 Earth 150 598 365.2 Mars 228 64.2 687 Jupiter 778 109,000 4,332 Saturn 1,429 56,900 10,760 Uranus 2,871 8,690 30,700 Neptune 4,504 10,280 60,200 Pluto 5,913 1.49 90,600
• 14.
  exerciSe 1. What isthe closest planet to the Sun? Mercury 2. What planet is famous for the beautiful rings Saturn that surround it? 3. What is the hottest planet in our solar system? Venus 4. Can humans breathe normally in space as they can on Earth? No 5. Is the planet Neptune bigger than Earth? Yes 6. What planet is known as the red planet? Mars 7. Is the sun a star or a planet? A star 8. Who was the first person to walk on the moon? Neil Armstrong 9. Does the sun orbit the Earth? No 10. What is the name of the force holding us to the Gravity Earth? More exercises More information