Tuesday, 30 June 2015

Forces at oaklands

WALT identify and explain where forces happen at our school
Drop something and gravity pulls it to the ground
Things float in the water because of bouyancy

Friday, 12 June 2015

explanation writing

                   How jet engines work
Jet engines belong on planes and it would be dangerous putting them on other things as they are so powerful that you would hurt yourself  now lets learn how they work.

                                                                                                                                                                      Jet engines use more fuel than a propeller power engine.
the air is compressed and sprayed with fuel  and then lit with an electric spark.
The gasses (the compressed and fuel)expand and blast out of nozzle at the back of the engine blasting it forward That creates thrust.

Jet engines have developed over time and are used in travelling planes and the jet engines is faster then a propeller power plane

Jet engines are like gas turbines.                                                                                                         Like piston engines their power comes from burning fuel.                                                                     The difference is that they burn fuel continuously to spin the blades.

Jets are probably the best engine for a plane because small,fast and quiet

Liquids and Friction