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Wednesday 9-24-14. Clear off desk – Pop QUIZlet ! When finished with quizlet place upside down on floor Read & answer questions on pp.280-281. B. F. A. G. E. C. D. Irregular. Spiral. Elliptical. Distances in the Universe.
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Wednesday 9-24-14 • Clear off desk – Pop QUIZlet! • When finished with quizlet place upside down on floor • Read & answer questions on pp.280-281
B F A G E C D
Irregular Spiral Elliptical
Distances in the Universe Any value will fit into it’s own value exactly ONCE!
1.6 8 km 1 300,000 km 300,000 km = 3,000,000 km
9.5 trillion km 9.5 trillion km/year = 9,500,000,000,000 9.5 trillion 9,500,000,000,000 =47.5 trillion km 1 47,500,000,000,000 km =47.5 x 1012
To set up your problems 10. How many km is a star that is 20 light years away. 20 ly • Write what value you are given to start your problem. • Put the unit of the starting value on the bottom of your conversion factor. • Put the unit you are changing it to on the top • Write in the values of the 2 units that are equal. • Do the math & cancel units km 9.5 trillion 1 _________________ ly 190 trillion km
You can cancel places of 10! • For Example working problem 10 backwards: 190,000,000,000,000 km = how many light years? 190,000,000,000,000 km x 1 ly 9,500,000,000,000 km 190,000,000,000,000 km 9,500,000,000,000 190,000 km 9,500 =
To Do: • # 11 • Finish Distance in Universe WS 4.5 trillion km = 1 light year. 1 4,500,000,000,000