We need to use negative numbers for sub zero temperatures and for distances between the highest peaks on earth and the deepest points in the oceans and deep mines.

Mauna Kea’s summit is 4205 metres above sea level but it extends below the sea surface to a depth of -6000 metres. This makes Mauna Kea taller than Mount Everest. Why is it taller and by how much?

We shall ask some questions relating to the facts and figures given below and learners can find answers to their own questions.7summits

What is the difference in the heights of the highest peak on earth and the deepest point on the ocean floor?

A drone is flying at the same height as the top of Mount Kilimanjaro but directly above the Mponeng Mine. Some men are working at the lowest point in the mine. How far are the men below the drone?heights-and-depths

What is the difference between the highest and lowest temperatures recorded at the South Pole?

How much hotter was the hottest day compared to the coldest day ever recorded in South Africa?

How much colder was the coldest day recorded at the South Pole compared to the hottest day recorded in Death Valley?

What is the range of temperature between the highest and lowest temperatures recorded in Greece and Italy.extreme-temps

Click here for Notes for Teachers.

Click to download the Extremes poster

References: https://en.wikipedia.org/wiki/List_of_weather_records





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