Cay

 A cay is a small island with a low bank.

It would be difficult for someone to live on a cay due to the low amount of food, animals and clean drinking water the small amount of food that you might find on a cay are small things like crabs, coconuts and other fruit and the reason for such little clean water is due to the cay being surrounded by seawater and the only way to get clean water is from the rain which on a small island in the carribian is a little amount roughly 200 mm a year compared to the average rain fall of New Zealand 600-1600

Pontoon Bridge

 A pontoon bridge is a type of portable bridge often build upon small canoes used to cross small rivers the bridges were originally used in ancient China simply to get large groups of people. Simple versions of the bridge are made by tying pieces of wood to some boats and are also reusable thanks to their mobility and ability to be taken apart 

 PPE is personal protective equipment 

You use it in the workshop 

The basic PPE for a workshop are safety glasses, earmuffs, overalls, shoes.

Safety glasses are used to protect your eyes and are a mandatory must have for the workshop 

earmuffs are used to protect your ears and should be used when operating machinery

overalls are used to protect your clothes and

shoes are to protect your feet from hazards on the ground

Schooner

 A schooner is a type of sailing ship often found with 4 or 6 sails it is most commonly left unpainted but when it is it will often be black the helm is located towards the back of the ship  

U-boat

 U-boats are german submarines that were employed primarily in the first and second World Wars. 

The U-boats could be used as fleet weapons against enemy ships but were most effective as naval blockades, most U-boats could only travel 2 hours underwater, in the first World War there were 178      U-boats sunk

https://www.youtube.com/watch?v=94XkuKnpfDA

Energy Transformation

When energy is passed from one type to another

Kinetic - Energy that is produced by motion 

Chemical potential - Energy that is transformed from fuel or food 

Heat - Temperature produces energy higher temperatures having more

Light - The wavelength of light

Gravitational - The force of gravity pushing down

Elastic potential - Energy stored due to a force changing an elastic object

Electrical - anything using power

Sound - wavelengths we can hear

The energy transformation was first from elastic and sound to kinetic when it started to fall it produced gravitational energy