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

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

3. everything that exists
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 systems are 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. Solar Systems or Galaxies
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 5billion years 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
Closer to the sun
Farther from the sun
Small
Large
Rocky
Gas
Less mass
More mass
More Dense
(More mass within a given space)
Less Dense
(Less mass within a given space)
Close to each other
Far from each other
Hotter temperatures
Colder temperature
Shorter Year
Longer Year
Shorter revolution
Longer revolution
I can contrast inner and outer planets with respect to their size, composition and distances between orbits.

15. On a piece of paper, sort the following characteristics into 2 groups
On a piece of paper, sort the following characteristics into 2 groups. 1: inner planets 2: Outer planets
Small
Closer to the sun
Longer year
Hotter temperatures
large
Farther from the sun
Shorter year
Cooler temperatures
Made of gas
More gravitational pull
Longer revolution
More dense
Made of rock
Less gravitational pull
Shorter revolution
Less dense
Place 2 colmun notes

16. Day, Month, Year
Days, months and years are different for each planet in the solar system.
Day
The time it takes for a planet to rotate (spin) once on it’s axis.
Ex. Earth takes about 24hours to rotate one time on it’s axis
Month
The time it takes for a moon to revolve one time around a planet.
Ex. The moon revolves around the Earth once every 28 days.
Year
The time it takes for a planet to revolve once around the sun.
Ex. The Earth revolves around the sun once every year. An earth year is days.

17. Key Vocabulary orbit, revolution and rotation
(Revolve)
When one object goes around another object.
Ex. Planets revolves around the sun
Ex. The moon revolves around the earth
Rotation
(Rotate)
Spinning on an axis
Ex. The Earth spins on it’s axis
Ex. The moon spins on it’s axis once every 28 days.
Orbit
The path an object takes as it revolves around another object
Ex. Planets orbit the sun in an elliptical path.

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 observed throughout 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.