Question

1. How can you prove that the earth is a sphere by looking at the Pole Star?​

Answer 1

Answer:

The Pole Star can be seen at an angle of 90° at the North Pole, as it lies directly at the line of axis of the earth, while its angle decreases towards the Equator i.e. it is 0° at the equator. It is only possible in an quarter arc of a circle. It proves that the earth is a sphere with circular surface.

Explanation:

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Answer 2

Answer:

NaCl – The Sodium Chloride Song

(K. McGarrigle, Garden Court Music, ASCAP)

Just a little atom of Chlorine, valence minus one

Swimming through the sea, digging the scene, just having fun

She’s not worried about the shape or size of her outside shell

It’s fun to ionize

Just a little atom of Cl with an unfilled shell

But somewhere in that sea lurks handsome Sodium

With enough electrons on his outside shell plus that extra one

Somewhere in this deep blue sea there’s a negative

For my extra energy

Yes, somewhere in this foam my positive will find a home

Then unsuspecting Chlorine felt a magnetic pull

She looked down and her outside shell was full

Sodium cried, “What a gas, be my bride

And I’ll change your name from Chlorine to chloride!”

Now the sea evaporates to make the clouds for the rain and snow

Leaving her chemical compounds in the absence of H2O

But the crystals that wash upon the shore are happy ones

So, if you never thought before

Think of the love that you eat when you salt you meat!