Earth
Today is the longest day on Earth... The planet’s rotation is slowing down by around
1.Ň milliseconds eĢery hundred years. 9n 1Ň0 million years, a day ģill be Ņň hr long.Stratovolcanoes
are cone-shaped
volcanoes, typically
with steep sides. They
are built up from alternate
strata (layers) of lava,
pumice and ash. Etna
has been growing for
c. 5 00,000 years.