Download Planets and Stars

PLANETS AND
STARS
EQ: How do Earth and its moon
move?
Vocabulary Words
 Rotate
 Axis
 Moon
 Orbit
 Revolves
 phases
Day and Night
 We have the cycle of day and night
because Earth rotates, or spins, on its
axis.
Times Zones
 The United States has 7 time zones
from Puerto Rico in the east to Hawaii
in the west.
Seasons
 Earth revolves, or travels in a path around the
sun. An orbit is the path of one object in
space around another.
 Earth takes about 365 days to orbit the sun.
The seasons change as Earth orbits the sun.
Phases of the Moon
 Over 29 ½ days the moon shape seems
to change. These different shapes are
called phases.
Let’s Review






What time zones do we live in ?
How do we get day and night?
How do we get the seasons?
Demonstrate orbiting and rotating.
What are the phases of the moon?
How many days does it take
 the Earth to rotate?
 the Earth to orbit?
 the moon to complete its phases?
EQ: What objects are in the
solar system?
Vocabulary Words
 solar system
 planet
 comet
Solar System
 A solar system is a group of objects
in space that travel around a star.
Solar System
The sun is the star in the center
of our solar system.
Planet
 A planet is a large object that moves
around a star. Earth is one of the 8
planets. Can you name the other planets?
Comet
 A comet is a ball of rock, ice, and
frozen gas.
Inner Planets
These are the four Inner planets.
Inner Planets
1st

planet from sun.
 Small with rocky
surface.
 Mercury is very hot it
can be 840°F.
 2nd planet from sun.
 Hottest planet in
solar system.
 Small with rocky
surface.
Inner Planets
 3rd planet from sun.
 Earth is the only planet
with liquid water and lots
of oxygen.
 Earth is a small planet
with a rocky surface with
1 moon.
 4th planet from sun.
 Called the “Red” planet.
 Small, about half of Earth’s
size with rocky surface
Outer Planets
These are the 4 Outer planets.
Outer Planets
 5th planet from sun.
 largest planet in our
solar system & made of
gas
 has at least 63 moons
and Great Red Spot
caused by a storm.
 6th planet from sun.
 Has rings and 31 moons.
 Has no known solid
surface.
 Made of gas helium, and
hydrogen .
Outer Planets




7th planet from sun.
Rotates on its side
Has a t least 27 moons
Large and made of
gases




8th planet from sun.
Very windy
Has at least 13 moons
Made of gas helium, and
hydrogen .
Inner Planets Outer Planets
Rotates slowly
Rotates quickly
Orbit the sun
quickly
Orbit the sun
slowly
Few moons
Lots of moons
No rings
Lots of rings
Have a solid
surface
Balls of gas with no
solid surface
Small planets
Huge planets
What about Pluto?
 Pluto is made of ice and rock. It use to
considered an Outer Planet, but it very
different from the Outer Planets.
 Now Pluto is called a “Dwarf Planet”.
What about Pluto?
There are 2 other Dwarf Planets called
Eris and Ceres.
Small Solar System Bodies
 There are 2 other kinds of objects that
revolve around the sun, asteroids and
comets.
Asteroids
Comets
 Comets are ball of rock, ice
and frozen gas. Most are
smaller than asteroids.
 Asteroids are made up
of rock and metal. Most
asteroids orbit between
Mars and Jupiter .
 Comets can change when
they get close to the sun.
Some of the frozen matter
turns into gas, which looks
like a tail.
Let’s Review
 What is the solar system?
 What is in the center of our solar system?
 Name the planets in the correct order.
 How is a planet defined as a inner or outer
planet?
 Name the inner and outer planets.
 Describe the other objects that orbit the
sun other than planets.
EQ: What can we see in the
sky?
Vocabulary
 Galaxy
Words
 Universe
 Star
 Sun
 Constellation
Star
 A star is a huge ball of very
hot gas.
Sun
 The sun is a star in the
center of our solar system.
The Sun and Other Stars
 A star is a huge ball
of very hot gases.
Star may be
different sizes and
colors.
 Red = coolest star
 Blue = hottest star
 Yellow = between
hottest and the coolest
Constellation
 A constellation is a
group of stars that
form an imaginary
picture in the sky.
Galaxy
 A galaxy has billons of stars. A galaxy is a
huge system of gases, dust, and stars. Our
solar system is on the edge of the Milky
Way galaxy.
Universe
The universe is everything in space.
Smallest to Largest
Seasonal Star Positions
 At night star seem to move. Their
position seem to change from season to
season. This is due to Earth’s movement.
Let’s Review
 What is a star?
 What does a star color tell about it?
 What are 2 ways people classify groups of
stars?
 Why do constellations seem to change their
positions in space?