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How are life cycles different?
How are life cycles different?
How are life cycles different?
How are life cycles different?

1 Look at the timeline. Which animals have the shortest
and the longest lifespans?

mouse: elephant:
1 year 70 years

mayfly: tiger: Greenland shark:
1 day 25 years 200–400 years

2 68 Listen and read. Label the diagram.

ANIMAL 1

LIFE CYCLES

egg
Different animals have different lifespans.
A mayfly lives for just one day, but some
sharks can live for over 200 years! 4 2
Giant tortoises live on the Galápagos
Islands in the Pacific Ocean. They can
live for a very long time. The oldest giant
tortoises are over 180 years old!

First, the mother tortoise lays an egg. 3
When a baby tortoise is born, it’s called
a hatchling. They grow for a few years
and become a juvenile or child. Then
they grow for another 25 to 40 years
and become an adult.

3 What are the stages in a DIDYOUKNOW…?
DIDYOUKNOW…?
DIDYOUKNOW…?
human life cycle? How long Giant tortoises can sleep for 16 hours a day!
is each stage? Think and say.

70 Science: How are life cycles different? | critical thinking

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