A. What is the diameter of the Earth at the equator?

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Presentation transcript:

A. What is the diameter of the Earth at the equator? 12,756 km

B. What is the diameter of the Moon? 3,500 km

C. What mathematical equation describes how many times larger in diameter Earth is than the moon? 3500km/12,765km =.27 Which is close to 1/4th.

D. What is the distance from the Earth to the Moon? 384,000 km

E. What equation describes how to measure the distance from Earth to the Moon using the Earth’s diameter as a unit of measure? 384,000km/12,765 km =30 Earth diameters distance from E to M/Earth’s diameter = 30 Earth diameters from the Earth to the Moon.

F. What is the diameter of the Sun? 1,392,000 km

G. What equation describes how many Earth diameters equal the Sun’s diameter? 1,392,000km/12,756km=109 Earth diameters

H. Why does the Sun appear to be the same size as the Moon H. Why does the Sun appear to be the same size as the Moon? What equation could you use to represent this? The sun is almost 400 times farther from the Earth than the Moon is from the Earth. The sun is almost 400 times larger than the moon. The equation would be 1,392,000km/3500km=400 (rounded)=150 million km/384,000km

I. Why is there a leap year every four years? It takes Earth 365 and 1/4th days to orbit the sun. We have to account for the extra time.

J. Decide if the diameter of the model moon you used in 2 J. Decide if the diameter of the model moon you used in 2.1 is to scale with the 12cm Earth. The middle sized sphere!

K. How big would your model Sun be if scaled to your 12cm Earth? The model would be 13 meters in diameter! 109 times 12 =1308 cm which is 13 meters