• Vertebrates have backbones.

• There are 5 types: mammals, birds, fish, reptiles and amphibians

• Some animals are suitable pets but others are not.

• Some animals give birth to live young; others lay eggs.

• Animals need food, water, sleep and air to survive

• Animals have life cycles that vary from birth to death

• Carnivores eat meat, herbivores eat plants. Omnivores eat both.

Anything you don't understand? Have a look at Year 3

The digestive system is a group of organs which break down food and absorb essential nutrients before excreting the waste.

Your teeth help you to break up your food. This is part of the physical part of digestion (the chemical part happens on your tongue and in your stomach). We have different types of teeth which all perform different jobs.

Fun fact: Different animals have different teeth. They can be different if the animals are herbivores or carnivores. Google animals' teeth to check out how their teeth compare to ours.

Food webs show us how plants and animals rely on each other to survive. Animals eat plants (if they are herbivores), animals (if they are carnivores) or both (if they are omnivores, like us) to survive. Therefore, lots of animals in the ecosystem rely on each other to survive.

Here are some examples of food webs:

There are 3 main elements that make up a food web. They are:

The Sun - This is the source of all energy for plants.

Producers - These are organisms that produce their own food (like plants)

Consumers - Organisms that cannot produce their own food so they have to eat other plants or animals to get their energy.