Download We live on the earth. It`s one of the planets in our solar

PLANETS
JOAN CARTAN-HANSEN: We live on the earth. It's one of the planets in our solar
system. Solar means connected to the sun and the sun is the center of our neighborhood.
The sun isn't a planet. It's actually a star and stars are basically big balls of burning gas.
The center of the sun or its core is like an enormous furnace, like a bomb that never
stops exploding. The heat spreads out from the sun and warms the rest of the solar
system and on the surface of the sun, gasses leap up in bright bursts called solar flares.
There are nine planets in our solar system that each revolve around the sun in what's
called orbit. Orbit is the path the planet takes around the sun and everything is held in
place by a force called gravity. Gravity is also what makes something fall when it's
dropped here on earth.
Now let's look at our neighbors. The planet nearest to the sun is Mercury. Now nearest
doesn't mean close. Mercury is about 36 million miles from the sun. The next planet is
Venus. It's about 67 million miles from the sun. Venus is about the same size as the
Earth but its atmosphere or the blanket of gasses that surround the planet is made up of
poisonous gasses. It's not at all a friendly place. It's covered with thick clouds which
reflect a lot of light. That's why Venus is the easiest planet to see in the night sky.
The Earth is the 3rd planet from the sun. At about 93 million miles away it's just the
right distance from the sun to be warm enough and cool enough for life and it has
enough gravity to hold on to its atmosphere. The Earth has one moon. Moons are
objects that orbit a planet the way a planet orbits the sun.
The next planet in the solar system is Mars. Mars is about half the size of the Earth and
is about 141 million miles away from the sun. It has a thin atmosphere. It is known as
the red planet. Mars has two small moons. A probe found a giant frozen sea of water
there and scientists believe there may be some kind of microbes living in the soil.
These four planets - Mercury, Venus, Earth and Mars are known as the inner planets.
Next comes a big gap called the asteroid belt. Here, asteroids are chunks of rock. Some
as small as pebbles, some as big as mountains orbit the sun. And after this gap come the
five outer planets.
Jupiter is about 483 million miles from the sun. It's huge. The largest planet in the solar
system. 1,300 Earths could fit inside this one planet.
Next comes Saturn. It's 887 million miles from the sun and is known for its rings. The
7th planet is Uranus, about 1.8 billion miles from the sun. It's tipped over on its side.
Neptune is the 8th planet in the solar system and Pluto is the 9th - sort of. Pluto is now
classified as a dwarf planet. Both Neptune and Pluto are smaller than the Earth and
very, very cold - about 11 times colder than your home's freezer.
So what is beyond our solar system? More stars and more planets. Our solar system is
part of a bigger galaxy or group of stars so when you look into the sky at night just think
what is out there to be discovered.
IES CIUDAD DE LOS POETAS
NATURAL SCIENCE
DEPARTAMENTO DE BIOLOGÍA Y GEOLOGÍA
PLANETS
We live on the_______________. It's one of the planets in our solar system. Solar means
connected to the sun and the sun is the center of our neighborhood.
The sun isn't a planet. It's actually a star and stars are basically big balls of __________ gas. The
center of the sun or its core is like an enormous furnace, like a bomb that never stops exploding.
The heat spreads out from the sun and warms the rest of the solar system and on the surface of
the sun; gasses leap up in bright bursts called solar _______________.
There are nine planets in our solar system that each _______________ around the sun in what's
called _______________. _______________ is the path the planet takes around the sun and
everything is held in place by a force called _______________. _______________ is also what
makes something fall when it's dropped here on earth.
Now let's look at our neighbors. The planet nearest to the sun is _______________. Now
nearest doesn't mean close. Mercury is about 36 million miles from the sun. The next planet is
Venus. It's about 67 million miles from the sun. _______________ is about the same size as the
Earth but its _______________ or the blanket of gasses that surround the planet is made up of
poisonous gasses. It's not at all a friendly place. It's covered with thick clouds which reflect a lot
of light. That's why Venus is the easiest planet to see in the night sky.
The Earth is the 3rd planet from the sun. At about 93 million miles away it's just the right
distance from the sun to be warm enough and cool enough for life and it has enough gravity to
hold on to its atmosphere. The Earth has one moon. Moons are objects that orbit a planet the
way a planet orbits the sun.
The next planet in the solar system is Mars. Mars is about half the size of the Earth and is about
141 million miles away from the sun. It has a thin atmosphere. It is known as the red planet.
Mars has two small moons. A probe found a giant _______________ sea of water there and
scientists believe there may be some kind of microbes living in the soil.
These four planets - Mercury, Venus, Earth and Mars are known as the inner planets.
Next comes a big gap called the _______________ _______________. Here, asteroids are
chunks of rock. Some as small as pebbles, some as big as mountains orbit the sun. And after this
gap come the five outer planets.
Jupiter is about 483 million miles from the sun. It's huge. The largest planet in the solar system.
1,300 Earths could fit inside this one planet.
Next comes Saturn. It's 887 million miles from the sun and is known for its rings. The 7th planet
is Uranus, about 1.8 billion miles from the sun. It's tipped over on its side. Neptune is the 8th
planet in the solar system and Pluto is the 9th - sort of. Pluto is now classified as a
_______________ planet. Both Neptune and Pluto are smaller than the Earth and very, very
cold - about 11 times colder than your home's freezer.
So what is beyond our solar system? More stars and more planets. Our solar system is part of a
bigger _______________ or group of stars so when you look into the sky at night just think
what is out there to be discovered.
IES CIUDAD DE LOS POETAS
NATURAL SCIENCE
DEPARTAMENTO DE BIOLOGÍA Y GEOLOGÍA