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Guess these by writing down the numbers…. How many stars do you think are in the Milky Way? How many kilometres away do you think our sun is from Earth? How long do you think it would take you to fly to Mars in a rocket?
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Guess these by writing down the numbers… • How many stars do you think are in the Milky Way? • How many kilometres away do you think our sun is from Earth? • How long do you think it would take you to fly to Mars in a rocket? • The sun is made of mainly hydrogen and helium gases. How heavy do you think a hydrogen atom is? • What do you think the diameter of a helium atom is?
200 billion = 200,000,000,000 • 150 million = 150,000,000 • About 220 days for a particular route. How many hours is This? • 220 x 24 = 5280 hours = mins • 0.00000000000000000000000167grams (3.s.f) • Hydrogen is one-quarter the weight of a helium atom. • 0.000000000001m 316,800
Compare the power to the number of zeros. • Powers of 10 • 10-2 = = • 10-3= = • 10-6= = • 5.34 × • = 5.34 × 10-6 • Powers of 10 • 102 = 10 × 10 = 100 • 103 = 10 × 10× 10 = 1,000 • 106 = 10 × 10× 10× 10× 10× 10 = 1,000,000 • 1012 = 1,000,000,000,000 • 5.34 × 1,000,000 • = 5.34 × 106
Write these in standard form Write these in ordinary form