E.S. Chapter 15

many ancient observers were

Greeks, Chinese, and Mayans

In a geocentric model, ___________ is at the center of the revolving planets and stars


The person who in 140 A.D. further developed the geocentric model

The greek astronomer Ptolemy

In a Heliocentric system, _____________ is at the center of the revolving planets and stars including Earth

the sun

The person who originally developed the Heliocentric model

the Greek scientist named Aristarchus

The person who further developed the Heliocentric system

The polish astronomer Nicolaus Copernicus

When the first updated version of the Heliocentric system was published


The scientist that found out that the orbit of planets are ellipses

Johannes Kepler

The scientist that convinced everyone that the heliocentric system was correct by using his own calculations

Galileo Galilei

the sun produces an enormous amount of energy from its


The process that the suns core uses to produce the mass amount of energy

nuclear fusion

Nuclear fusion is when

hydrogen atoms join together to form helium

The energy produced by the suns core is moves outward through the

radiation zone

Because the radiation zone of the sun is so dense it can take energy ____________ years to move through it


The outermost layer of the sun's interior

the convection zone

The sun's atmosphere includes

the photosphere, the chromosphere, and the corona

The inner layer of the suns atmosphere


the middle layer of the suns atmosphere


the outer layer of the suns atmosphere


Features on or just above the sun's surface include

sunspots, prominences, and solar flares

Areas of gas on the suns surface that are cooler than the gases around them


Huge loops of gas that link different parts of sunspot regions are called ___.


When the loops in sunspot regions suddenly connect and release large amounts of magnetic energy and when this energy heats gas on the sun to millions of degrees celsius it causes the gas to erupt into space

solar flares

sun/solar system

the sun and all of the things that orbit around it

a center of gravity that controls every things revolution this is our sun, multiple planets, satellites, comets, meteors, moons, stars, meteoroids, dwarf planets

things that make up a solar system

My Very Earthly Mother Just Served Us Nachos

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune

99% of the mass in the solar system is the


1,000,000 ________ would be able to fill the sun


Mercury is both

the hottest and coldest planet at the same time

one day on Mercury is

58 Earth days

Mercury is the

smallest planet

Mercury is the ____ planet from the Sun.


Venus is Earths

sister planet

Venus and Earth are sister planets because

they are about the same size

Venus is known for its very high

greenhouse effect

Venus is so hot that it can

melt lead

Venus has such high pressure that it can

crush space ships

Venus' day is longer than

its year

Mars is half the size of

the Earth

Venus has 90 times atmospheric pressure of


Mars has one hundredth atmospheric pressure of


Mars is the next planet we would go to because

we would be able to adapt easier there than on Venus

There is evidence that at one time there was ________ on Mars


Mars has multiple


Mars has very high


Mars has some


The inner planets are

Mercury, Venus, Earth, Mars

The area of the solar system that separates the inner and outer planets

the asteroid belt

Jupiter's Great Red Spot is a

giant storm

Jupiter is a _____ giant


Jupiter is partially know for the

galilean satellites

Jupiter has a thin ______ that we can hardly see


Inner planets have ______ atmospheres than the outer planets


The inner planets have almost no ________ but the outer planets have lots of them


Saturn is know for its ______


Saturn is the ______ largest planet


Saturn would _______ if you put the planet in water


Uranus is tilted on its


Uranus was hit by something to make it ______ the wrong way


Neptune is known for its very strong