1. Animals including Humans Year 5 Lesson 3 LI: Explore the variability of gestation periods of different mammals

2. Input How does a mammal develop inside their mother?

3. Gestation The length of time a mammal spends in its mother’s womb is known as the ‘gestation period’. This gestation period can vary enormously from species to species. Why do you think this is?

4. Gestation Periods Create a bar graph showing the gestation periods of different animals. What do you notice? Mammal Gestation period in days Cat63 Chimpanzee 240 Lion108 Human266 Rabbit31 Squirrel44 African elephant650 Whale360 Horse336 Polar bear241 Giraffe435 Mouse21 Rhinoceros480 Hamster16 Dog61 Camel400

5. Plenary What does dependency mean? Why do different animals have different dependencies?