Value Unit kg m/s years m s g km2 Mass of the Earth Speed of Light Time since the dinosaurs years Thickness of a sheet of paper m Number of seconds in a day s Mass of a hydrogen atom g Area of North America km2

Value Unit 6 x 1024 kg m/s years m s g km2 Mass of the Earth Speed of Light m/s Time since the dinosaurs years Thickness of a sheet of paper m Number of seconds in a day s Mass of a hydrogen atom g Area of North America km2

Value Unit 6 x 1024 kg 3 x 108 m/s years m s g km2 Mass of the Earth Speed of Light 3 x 108 m/s Time since the dinosaurs years Thickness of a sheet of paper m Number of seconds in a day s Mass of a hydrogen atom g Area of North America km2

Value Unit 6 x 1024 kg 3 x 108 m/s 6.4 x 107 years m s g km2 Mass of the Earth 6 x 1024 kg Speed of Light 3 x 108 m/s Time since the dinosaurs 6.4 x 107 years Thickness of a sheet of paper m Number of seconds in a day s Mass of a hydrogen atom g Area of North America km2

Value Unit 6 x 1024 kg 3 x 108 m/s 6.4 x 107 years 8 x 10-5 m s g km2 Mass of the Earth 6 x 1024 kg Speed of Light 3 x 108 m/s Time since the dinosaurs 6.4 x 107 years Thickness of a sheet of paper 8 x 10-5 m Number of seconds in a day s Mass of a hydrogen atom g Area of North America km2

Value Unit 6 x 1024 kg 3 x 108 m/s 6.4 x 107 years 8 x 10-5 m Mass of the Earth 6 x 1024 kg Speed of Light 3 x 108 m/s Time since the dinosaurs 6.4 x 107 years Thickness of a sheet of paper 8 x 10-5 m Number of seconds in a day 8.6 x 104 s Mass of a hydrogen atom g Area of North America km2

Value Unit 6 x 1024 kg 3 x 108 m/s 6.4 x 107 years 8 x 10-5 m Mass of the Earth 6 x 1024 kg Speed of Light 3 x 108 m/s Time since the dinosaurs 6.4 x 107 years Thickness of a sheet of paper 8 x 10-5 m Number of seconds in a day 8.6 x 104 s Mass of a hydrogen atom 1.66 x 10-24 g Area of North America km2

Value Unit 6 x 1024 kg 3 x 108 m/s 6.4 x 107 years 8 x 10-5 m Mass of the Earth 6 x 1024 kg Speed of Light 3 x 108 m/s Time since the dinosaurs 6.4 x 107 years Thickness of a sheet of paper 8 x 10-5 m Number of seconds in a day 8.6 x 104 s Mass of a hydrogen atom 1.66 x 10-24 g Area of North America 2.42 x 107 km2

‘Big’ Numbers 1 x 103 Thousand 1 x 106 Million 1 x 109 Billion 1 x 1012 Trillion

‘Big’ Numbers 1 x 1015 Quadrillion - The number of grains of sand on a beach - Market price of all the assets in the World - Number of ants in the World

‘Big’ Numbers 1 x 1018 Quintillion - Distance (in miles) to the furthest object you can see with the naked eye

‘Big’ Numbers 1 x 1078 Number of atoms in the Universe 1 x 10100 A Googol

Calculations using standard form EXAMPLE (2 x 103) x (4 x 104) = (2 x 4) x (103 x 104) = 8 x 107

Calculations using standard form Try these (2 x 106) x (2 x 103) (3 x 107) x (1 x 102) (5 x 102) x (1 x 104) (2 x 108) x (4 x 103) (3 x 10-1) x (3 x 105) (4 x 103) x (2 x 10-5) (3 x 102) x (4 x 103) Harder!

Calculations using standard form Try these (2 x 106) x (2 x 103) 4 x 109 (3 x 107) x (1 x 102) 3 x 109 (5 x 102) x (1 x 104) 5 x 106 (2 x 108) x (4 x 103) 8 x 1011 (3 x 10-1) x (3 x 105) 9 x 104 (4 x 103) x (2 x 10-5) 8 x 10-2 (3 x 102) x (4 x 103) 1.2 x 106