Transcript Place the following objects in order from largest to smallest:

I understand the relative size and
relationship between the solar
system, galaxy, and universe.
Objects in the Universe
ordered from largest to smallest
LARGEST
Universe
Galaxy
Solar System
Smallest
The Universe is….
everything
that
exists
Galaxies
Galaxies are giant structures
made of BILLIONS of stars
There are
hundreds of billions of
galaxies in the universe.
Our solar system located in a
galaxy called the Milky Way.
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.
Which is smaller?
UNIVERSE
or
Galaxies
Solar Systems or Galaxies
Stars
Galaxy
or
Solar Systems
or
stars
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
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.
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
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
The planets in our solar system
I can contrast inner and outer
planets with respect to size,
composition and distances
between orbits.
Inner Planets vs. Outer Planets
INNER PLANET
Closer to the sun
Small
Rocky
Less mass
More Dense
OUTER PLANETS
Farther from the sun
Large
Gas
More mass
Less Dense
(More mass within a given space) (Less mass within a given space)
Close to each other
Far from each other
Hotter temperatures
Shorter Year
Shorter revolution
Colder temperature
Longer Year
Longer revolution
On a piece of paper, sort the following characteristics
into 2 groups. 1: inner planets 2: Outer planets
Small
Closer to the
sun
large
Farther from
the sun
Made of gas More
gravitational
pull
Made of rock Less
gravitational
pull
Longer year
Shorter year
Longer
revolution
Shorter
revolution
Hotter
temperatures
Cooler
temperatures
More dense
Less dense
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 365.25 days.
Key Vocabulary
orbit, revolution and rotation
Revolution When one object goes around another object.
(Revolve) Ex. Planets revolves around the sun
Ex. The moon revolves around the earth
Rotation
Spinning on an axis
(Rotate)
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.
I can describe how the force of
gravity maintains orbits within a
solar system.
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.
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.
•
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.