Question

If you represented Earth's history by a line that is 1 m long, how long a segment (in cm) would represent the 400 million years since life moved onto the land

Answer 1

The length of the segment that will represent the 400 million years is 8.8 cm.

The given parameters:

• length of age of the Earth = 1 meter long
• age of the Earth = 4.54 billion years
• time to be represented in the given segment = 400 million years

The length of the segment that will represent the 400 million years is calculated as follows;

4.54 billion years ------------- 1 m

400 million years ------------- ?

$\frac{1 \ m}{4.54 \times 10^9 \ years} \times 400 \times 10^6 \ years = 0.088 \ m$

The length of the segment in centimeters (cm) is calculated as follows;

$= 0.088 \ m \times 100 \ cm\\\\= 8.8 \ cm$

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