The Inner Solar System - Super Teacher Worksheets

The Inner Solar System - Super Teacher Worksheets

Name: __________________________________ The Inner Solar System by Leslie Cargile The inner solar system is the name of the terrestrial planets and ...

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Name: __________________________________

The Inner Solar System by Leslie Cargile

The inner solar system is the name of the terrestrial planets and asteroid belt. Terrestrial is just a fancy way of saying rocky. Like the Earth, terrestrial planets have a core of iron and rock. At the center of the solar system is the Sun. The Sun is a big ball of hydrogen powered by nuclear reactions. Massive explosions are going on all of the time inside the Sun. It’s what makes the light every day and keeps our planet warm. Light zips from the Sun to us in about eight minutes. The Sun is the most massive thing in our solar system. It is so big you could fit about a million Earths inside of it! Closest to the Sun is the planet Mercury. You could squeeze about eighteen Mercury’s inside of Earth. It is made of mostly rock, but it has a huge iron core and it generates a big magnetic field. Speedy little Mercury sails around the sun in only eighty-eight days. Mercury was the messenger of the gods in Roman mythology, known for his speed.

You know what planet is next. You live on it! Yup, the Earth is number three. We have a rocky iron core at the center of our planet. We have liquid water, and our air is made of mostly nitrogen and oxygen. It takes three hundred and sixty-five days for us to circle the sun. We only have one moon.

Next to us in is Mars. Mars also has a core of rock and iron. It is a little more than half the size of Earth. The most distinct feature about Mars is its red color. Dust rich in iron oxide covers the planet. It’s sort of like the planet is rusting. White caps at the poles are water, forever frozen because of the colder temperatures further from Second in line comes Venus, which is the Sun. The only place the temperature rises sometimes called Earth's twin. It's about the same above freezing is at the equator, or the middle of size as Earth, but that’s where the similarities end. the planet. Mars has two moons, Deimos and Venus is always covered in thick clouds full of Phobos but they are much smaller than our own sulfuric acid. They whip around the planet at moon. It takes nearly twice as long for Mars to more than two hundred twenty mph. Violent circle the sun at almost 684 days. winds shoot sand made of silicate around The last part of the inner solar system is Venus’s very dry, arid surface. The temperature called the Asteroid Belt. It’s the line between the averages nine hundred degrees, and the pressure’s ninety times that on Earth. It takes two inner rocky planets and the outer gaseous planets. Unlike the rest of the Inner Solar System, hundred and twenty four days to orbit the sun. the Asteroid Belt isn’t a planet at all. It is a bunch Like Mercury, Venus was also named after a of large rocky chunks, mostly meteoroids. There's Roman Goddess, the Goddess of love. also a dwarf planet named Ceres in the asteroid belt. The rest aren’t very large. The Earth is the only planet that we know of with life on it, but universe is a big place. Much of our solar system is still a mystery, there is still plenty to explore.

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Name: __________________________________

The Inner Planets by Leslie Cargile

1.

How does the size of Mercury compare to Earth? a. Mercury is 18 times the size of Earth b. Mercury is

1 18

c. Earth is

the size of Mercury.

1 18

the size of Earth.

d. Earth is 18 times smaller than Mercury.

2.

Which statement about the inner planets' orbits is true? a. Venus orbits the sun more quickly then Mercury. b. Mercury orbits the sun more slowly than Mars. c. Earth orbits the sun more quickly than Venus. d. Mars orbits the sun more slowly than Earth.

3.

What two types of gas make up most of Earth's atmosphere? _____________________ and _____________________

4.

According to information in the article, where would you find water on Mars? _________________________________________________________________________________

5.

How long does it take light to travel from the sun to the Earth? _________________________________________________________________________________

6.

Which would be the most appropriate nickname for Venus? a. the cold desert planet b. the first inner planet c. the windy planet d. the triple mooned planet

Now Try This: Make a Venn diagram to compare and contrast Earth and Venus. Super Teacher Worksheets - www.superteacherworksheets.com

Name: __________________________________

The Inner Planets Vocabulary Activity

Fill in the missing letters to create a word from the article. Then, write the full word on the line. Be sure you spell each word correctly.

1.

___ i ___ ___ ___ ___ r ___ ___ ___ e ___

1. _________________________________

clue: likenesses

2.

___ ___ ___ a ___ ___ r

2. _________________________________

clue: an imaginary line around the center of a planet

3.

___ a ___ e ___ u ___

3. _________________________________

clue: made of gas

4.

4. _________________________________

___ r i ___ clue: lacking water or rainfall

5.

___ e ___ ___ ___ s ___ ___ ___ a ___

5. _________________________________

clue: rocky

6.

___ ___ ___ r ___ ___ e ___

6. _________________________________

clue: most abundant gas on Earth

7.

___ a ___ ___ i ___ e

7. _________________________________

clue: containing a lot of mass; large

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ANSWER KEY

The Inner Planets by Leslie Cargile

1.

How does the size of Mercury compare to Earth? b a. Mercury is 18 times the size of Earth b. Mercury is

1 18

c. Earth is

the size of Mercury.

1 18

the size of Earth.

d. Earth is 18 times smaller than Mercury. 2.

Which statement about the inner planets' orbits is true? d a. Venus orbits the sun more quickly then Mercury. b. Mercury orbits the sun more slowly than Mars. c. Earth orbits the sun more quickly than Venus. d. Mars orbits the sun more slowly than Earth.

3.

What two types of gas make up most of Earth's atmosphere? nitrogen and oxygen

4.

According to information in the article, where would you find water on Mars? at the north and south pole

5.

How long does it take light to travel from the sun to the Earth? 8 minutes

6.

Which would be the most appropriate nickname for Venus?

c

a. the cold desert planet b. the first inner planet c. the windy planet d. the triple mooned planet

Now Try This: Make a Venn diagram to compare and contrast Earth and Venus.

Super Teacher Worksheets - www.superteacherworksheets.com

ANSWER KEY The Inner Planets Vocabulary Activity

Fill in the missing letters to create a word from the article. Then, write the full word on the line. Be sure you spell each word correctly.

1.

s i m i l a r i t i e s

1. similarities

clue: likenesses

2.

e q u a t o r

2. equator

clue: an imaginary line around the center of a planet

3.

g a s e o u s

3. gaseous

clue: made of gas

4.

a r i d

4. arid

clue: lacking water or rainfall

5.

t e r r e s t r i a l

5. terrestrial

clue: rocky

6.

n i t r o g e n

6. nitrogen

clue: most abundant gas on Earth

7.

m a s s i v e

7. massive

clue: containing a lot of mass; large

Super Teacher Worksheets - www.superteacherworksheets.com