I understand the relative size and relationship between the solar system, galaxy, and universe.

1. I understand the relative size and relationship between the solar system, galaxy, and universe.

2. Objects in the Universeordered from largest to smallest LARGEST Universe Galaxy Solar System Smallest

3. The Universe is…. everything that exists

4. Galaxies Galaxies are giant structures made of BILLIONS of stars There are hundreds of billions of galaxies in the universe.

5. Our solar system located in a galaxy called the Milky Way.

6. Solar systemsare located around individual stars in a galaxy. Our solar system is located on the outer edge of a spiral galaxy called the Milky Way.

7. Which is smaller? UNIVERSE or Galaxies Solar Systems or Galaxies Stars or Solar Systems Galaxy or stars

8. What is a solar system? • A region of space where the gravitational force of a star influences all other objects. • In our solar system, the gravitational pull of the sun keeps the planets in orbit

9. Our solar system • Our solar system is made up of one star and 8 planets, dwarf planets, comets, asteroids, and moons. • Our star, the sun, is the largest object in the solar system. • Our solar system started about 5billionyears ago. • We live on Earth. The third planet from the sun. • Our solar system is in the Milkyway galaxy.

10. The Sun • 93,000,000 miles away from Earth • Rotates • Has dark spots that are cooler areas called Sunspots • Has solar Flares-Large amount of energy leaves the sun. • has layers • Different layers act different • Sun is made of gas

11. A planet is…. • an object that is a sphere • Revolve around a star • Large enough to have enough gravity to clear all objects out of it’s orbit • Orbit is on the same plane as other planets in the solar system

12. The planets in our solar system

13. I can contrast inner and outer planets with respect to size, composition and distances between orbits.

14. Inner Planets vs. Outer Planets

15. On a piece of paper, sort the following characteristics into 2 groups. 1: inner planets 2: Outer planets

16. Day, Month, Year Days, months and years are different for each planet in the solar system.

17. Key Vocabulary orbit, revolution and rotation

18. I can describe how the force of gravity maintains orbits within a solar system.

19. What keeps the planets in orbit around the sun? Gravity is the attractive force between 2 objects. The force of gravity is dependent on the size of the objects & the distance between the 2 objects. Size: Larger objects with more mass have more gravitational pull Ex. Since the sun is the largest object in the solar system, it and has the most gravity of any object in the solar system. All objects in the solar system are trapped in the suns gravitational pull. Distance: Objects farther away from each other have less gravitational pull. Ex. The moon and the Earth are pulling on each other. However, the Earth is larger and has a greater gravitational pull, so the moon is trapped in Earth’s gravitational pull. However, the moon doesn’t crash into Earth, because it’s pulling on the Earth in the opposite direction. We see evidence of this as tides.

20. Gravity in action: Ex. The moon and the Earth are pulling on each other. However, the Earth is larger and has a greater gravitational pull, so the moon is trapped in Earth’s gravitational pull. However, the moon doesn’t crash into Earth, because it’s pulling on the Earth in the opposite direction creating a balance of gravitational force. We see evidence of this as tides.

21. Effects of GRAVITY is observedthroughout the universe!!!! • Formation of all objects in space-planets, moons, stars, galaxies • Keeps the planets in orbit around the sun • Keeps the moons in orbit around the planets • Causes the tides on Earth • Causes the same mass to have different weights on different planets.