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Hello everyone! My name is Alex, and I am from the 

planet Mars. I am new to Earth so I am going to 

explore as many places as I can before I have to go 

back home! I cannot wait to share my journey with 

you, so come along and enjoy learning about many 

different things with me!

Let's be geologists 

and study the 

Earth!

Before we begin, I want to tell you a little bit about 

how the universe was created. 14 billion years ago, 

there was a giant explosion in space called the Big 

Bang Theory. That is what formed the planets, 

galaxies, moons, and stars. Scientists have formed 

hypothesizes about this phenomenon, but this theory 

has not been made into a law because it cannot be 

proven false.

I wonder what that blue color is and what those 

white fluffy things are. Do you know what that 

picture is? 

That is right! The blue is the sky and the giant 

white pillows are called clouds. Precipitation or 

rain, falls from the clouds when they get to full 

with water from the ocean.

Many different objects can be seen in the sky like 

airplanes, birds, and even bees!

The sky is everywhere and it is created by different 

layers of gas.

The atmosphere you live in has 5 layers, but you 

cannot see them- they are invisible. They are up at a 

very high altitude in the sky and they are made of 

gaseous substances.

The bottom layer, which is closest to you is called the 

troposphere. Next, is the stratosphere. Then, the 

ozone layer and then the mesosphere is on top of 

that. The top layer is called the thermosphere.

All of those help protect all of the living things on 

Earth from harmful Sun rays and ultraviolet radiation 

exposure.

When the Sun is tired and needs to go to sleep, the 

Moon comes out at night. This is what the sky looks 

like at night.

Sometimes you can see comets, constellations, or 

even other planets!

Someone who studies astronomy, or space 

is called an astronomer.

I am sure you know what this is a picture of. This is 

the planet you live on- Earth! It is made of 5 

different layers. Inside the Earth, the very first layer 

is a sphere called the core. On top of that is the 

outer core, then the mantle, and then the crust.

The crust is what the surface you stand on is made 

of. It has two layers called the asthenosphere and 

lithosphere.

Everything in the world is made up of 

atoms. All of the things in the previous 

pages are made of atoms. Like the 

planets, clouds, the core, and oxygen.

Atoms are the basic building blocks of 

matter that make up everyday objects. 

Your clothes and shoes are made of 

atoms. Your hair and the food you eat 

are even made of atoms! However, you 

cannot see atoms, they are invisible.

Now that we know more information about the 

Earth, lets explore what kind of things live on the 

beautiful planet!

See the green and blue things around me in the 

picture on the left? Turn the page to learn what 

they are!

Earth is different than other planets; there are many 

different things that live on Earth. It makes up a 

biosphere-the ecosystem comprising the entire earth 

and the living organisms that inhabit it. Where I am 

from, we do not have a biosphere.

Those green things you see in the picture are called 

continents. There are 7 of them and they used to be 

combined together and form the super-continent 

called Pangaea until continental drift occurred.

The blue all around them is water. There are 5 major 

oceans in the world.

The 7 continents are: North America, South 

America, Africa, Antarctica, Europe, Asia, and 

Australia.

North America is the continent you live on and it is 

located north of South America and west of 

Europe.

Let's go explore the country of North America!

North America is a great place to live because 

there are many different biomes.

The United States largest biomes are: the desert, 

grassland, deciduous forest, and coniferous 

forest.

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