The crocodile and bird have a _______________ relationship. The crocodile benefits by having its teeth cleaned. The bird benefits by gaining food and protection. Both animals benefit from this relationship.

_____ is the rate of flow of electric charges.

The symbol shows a _____.

There are _____ batteries in the diagram,

with the positive terminal on the _____.

Ammeters must be connected in _____ to measure current.

Power is the amount of _____ converted in one second.

A 2 kW freezer is used for 3 hours. The energy used is _____ kWh.

1 kWh costs 20 cents.

Using a 3 kW lamp for 2 hours will cost _____ cents.

The _____ melts and breaks the circuit to protect the appliance when the current is too high.

Which is the oesophagus?

What does the large intestine do?

Which part of the Digestive system pushes food towards the stomach?

The part of the digestive system in which most chemical digestion takes place.

An organ that stores bile after it is produced by the liver.

Which organ absorbs water and mineral salts?

 Bile is a chemical that helps to emulsify ________

What acid does the stomach produce?