pptx, 144.67 KB
pptx, 144.67 KB
pdf, 28.77 KB
pdf, 28.77 KB
pdf, 588.65 KB
pdf, 588.65 KB
pub, 235.5 KB
pub, 235.5 KB
pdf, 206.21 KB
pdf, 206.21 KB
Lesson Objectives
State the composition of the Earth’s current atmosphere
Represent the composition as percentages, fractions and ratios
Explain what has led to these changes in the atmosphere

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