18-11 What else do we know about the universe?
Lesson Review
For each statement or description below, write the term that best matches it. Use the terms in the box. You may use terms more than once.
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universe black hole quasar colliding galaxy Big Bang speed of light |
1. includes everything that exists anywhere in space
2. an old, massive star that has collapsed on itself
3. occurred 10 to 15 billion years ago
4. brighter than the light of a thousand galaxies
5. two or more collections of stars that pass through each other
6. forms when a whole star is swallowed by a black hole
Skill Challenge
Skills:
interpreting diagrams, sequencing, analyzingThe diagram below shows the formation of the universe. Use the diagram to answer the questions. Use additional paper as needed.
1.
What is shown at letter A?2. What happened in the first fraction of a second of the universe’s existence?
3. When did the first nuclei of hydrogen and helium form?
4. What happened a little more than 300,000 years after the universe formed?
5. How old was the universe when the first galaxies began to form?