What is a rocket?A rocket can describe any object that is propelled by fast moving liquid or gas! Most rockets have a nose or cone at the top, a body that houses the fuel and fins at the base. Rockets are usually powered by a chemical reaction (explosion) within the rocket itself. This chemical reaction requires both fuel and oxygen, both of which must be carried within the rocket. The fuel and oxygen are called the propellant. There are two types of propellant, liquid propellant and solid propellant. A solid propellant rocket is easier, simpler and cheaper to make. However, these rockets are harder to guide and control as once the chemical reaction is started it is hard to stop. A liquid propellant rocket is more complex and expensive to make but the burning of the liquid fuel is allot easier to control.
A bit of historyThe Chinese were the first to invent rockets when they started filling bamboo tubes with gunpowder and lighting them. Rocket science really began with an English man called Isaac Newton. He formulated three laws to explain the physics of motion. These laws explain how rockets work!
Newton‛s 3rd Law of Motion states that every action has an equal and opposite reaction!
To understand this law think of a balloon full of air. If the balloon is untied and the air suddenly let out, it will escape the balloon with such force that it will propel the balloon in the opposite direction. The force of the air leaving the balloon is called the thrust! The thrust that powers the launch of a rocket comes from the force of the gas (generated by the burning fuel) being ejected from the rear of the rocket!
The first liquid propellant rocket was launched in 1926 by an American called Robert Goddard. He is considered the father of modern rocket
“A rose can say ‘I love you’, orchids can enthrall, but a weed bouquet in a small chubby fist, – that says it all.” -Author Unknown
I heard this saying recently and it came to mind again today as I strolled home in the beautiful sunshine
Week 27th May – 2nd June 2013
How did you do with this weeks “Mystery Creature”? A few correct answers… it was a two toed Amphiuma!The two toed Amphiuma (Amphiuma means) is a =&0=& found primarily in Southern USA. They are often (incorrectly) called conger eel, congo eel or
My son just loves apes, all sizes, shapes and nature! I think he feels a kindred spirit with their curious, mischievous side and the ease and ability with which they swing and climb. As his mother, watching him grow over the last seven years
This weeks #FunFriday experiment is a simple and easy way to teach children how sound moves in air.
What you will need:
- An empty plastic bottle
- A piece of plastic (cut from a plastic bag or equivalent)
- An elastic band or tape
- Small candles
(Adult assistance required!)
Just follow the steps in the video… and the “big kids” among you might like the second
This week the Canadian astronaut, Commander Chris Hadfield and his fellow astronauts (Tom Marshall (American) and Roman Romanenko (Russian) ) returned from the International Space Station (ISS). After spending more than five months in Space, their
The other day I was standing in my kitchen when I heard a little snigger from behind me. You know someone is up to mischief before you even turn around…and they were! My little three year old had a block of butter in one hand and a spoon
Week 13th – 19th May 2013
How did you do with this week’s mystery creature? Did you like the little twist this week… can you name this EGG? So what common back garden bird laid these eggs?…
|This week’s mystery creature… robin eggs!|
It was a Robin! These six beautiful