5.2 Summative Review On-Level & PreAP. The Sun Main elements: Hydrogen & Helium Gravity is greatest due to: MASS Center of our solar system. Planets orbit.

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Presentation transcript:

5.2 Summative Review On-Level & PreAP

The Sun Main elements: Hydrogen & Helium Gravity is greatest due to: MASS Center of our solar system. Planets orbit the sun !

Comets Cosmic snowballs of frozen gases, rock, and dust. About the size of a small town. Have extremely elliptical orbits !! Big beautiful tails that appear to glow because they reflect the light from the Sun.

Gravity Newton's law of universal gravitation states that any two bodies in the universe attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Gravity is the force that keeps the planets orbiting the sun and the moons orbiting their planets !!!

Galileo main points to remember: Improved the telescope He was the first to observe the moons or satellites of Jupiter!

SPACE TRAVEL

● Sputnik I is the first man-made satellite to orbit around the earth. Russian ● Yuri Gagarin is the first man to orbit the earth ….. Russian ● America responds with Project Mercury!!! First manned space flight by U.S. Sending Alan Shepherd and then John Glenn into space. ● John F. Kennedy’s “We choose to go to the moon …. In this decade!” - It happens in 1969!!!

Astronauts have brought back many items from space …….. Are they souvenirs or are they brought back for research?

Launching rockets! Great force is required to escape earth’s atmosphere. Less force required on planets or moons with less mass (means less _______)!!! Rockets push down - to thrust the spacecraft upward! Just the way you push down to accomplish a push UP!

Space Stations The current operational space station is ISS - INTERNATIONAL SPACE STATION NASA currently is working on a plan to explore other worlds. The space station is one of the first steps. NASA will use lessons learned on the space station to prepare for human missions that reach farther into space than ever before. Check out the live views of earth herehere Video herehere

Watch this ………. What are the dangers to the spacecraft re-entering the earth’s atmosphere and why?

Future of space exploration

METAMORPHIC- form deep inside the earth. HEAT & PRESSURE! IGNEOUS- form deep inside the earth. MELTING & COOLING ! SEDIMENTARY - Weathering and Erosion !!