P7 OCR 21st Century Science

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Created by: Sarah
Created on: 29-05-12 21:51

A solar day is....

the time from noon on one day, to noon on the next

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A star with a positive declination will be visible from the...

Northern Hemisphere

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The Moon appears to travel east-west across the sky in...

24 hours 49 minutes

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A total solar eclipse occurs when the...

Moon is directly in front of the Sun

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The principal axis is...

The line that passes through the middle of the lens

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Why do astronomers use concave mirrors?

Allows them (lenses) to be larger to collect more light

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In the Great Debate Shapely believed that...

The Milky Way was one galaxy and that nebulae were gas clouds

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Convert 400K to degrees Celsius

127 degrees Celsius

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The Convective Zone of a Star is...

where energy is transported to the surface via convection currents

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The removal of electrons from a star is called?

Ionisation

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A star like the Sun will eventually end up as a...

White Dwarf

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What is the force that keeps the nucleus together?

Strong Nuclear Force

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Chile and what other country is usually chosen for the site of an observatory?

Australia

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What is the advantage of space-based telescopes?

Can use parts of the electromagnetic spectrum that the atmosphere absorbs

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Other cards in this set

Card 2

Front

A star with a positive declination will be visible from the...

Back

Northern Hemisphere

Card 3

Front

The Moon appears to travel east-west across the sky in...

Back

Card 4

Front

A total solar eclipse occurs when the...

Back

Card 5

Front

The principal axis is...

Back

View more cards

Get Revising

P7 OCR 21st Century Science