Earth Science Section 30.3 and 30.4 Homework: Star Groups and The Big Bang Theory: Due Wednesday, 5/16/12

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Read Section 30.3 and 30.4, pages 789-796. Answer the questions that follow.

Link for Question #5.

http://www.astr.ua.edu/keel/galaxies/classify.html

Link for Question #6.

http://www.hubblesite.org/gallery/album/galaxy/

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Last Name, First Name *

Period (Do not put nd, rd, or th after the number.) *

Scientists have concluded that the approximate age of the Universe since the Big Bang is *

4.5 billion years

7 billion years

13.7 billion years

25 billion years

6,000 years

The Milky Way and Andromeda Galaxies are know as ________________________ galaxies. *

elliptical

spiral

irregular

circular

What is the best method to explain the current behavior of the Universe? *

The Universe is expanding in to existing space

space itself is expanding and the Universe continues to grow

The Universe is contracting (falling back in on itself) and we are due for a big crunch in about 4.5 billion years

The Universe is unchanging. It is neither growing nor shrinking.

Our studies over the past 10 weeks have studied about _______________ of the known Universe. Dark matter and Dark Energy comprise the rest. *

100%

96%

50%

Look at the first link above for galaxy classification. Tell me what the basic differences are between spiral, elliptical, and irregular galaxies. *

Go to the second link above and tell me what your favorite galaxy image is and why. *

The current model of galaxies suggests that there are super-massive _____________ ________________ at the center of every galaxy. *

neutron stars

black holes

planetary nebulae

astro physicists

What is different about quasars compared to regular galaxies? *

Describe the Big Bang Model of the formation of the Universe and what it says. *

True or False. Our solar system is at the center of the Milky Way Galaxy. *

True

False

True or False. Our Milky Way Galaxy is at the center of The Universe. *

True

False

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