Presentation on theme: "THE EARTH IN SPACE The Earth in Space HOW WE DETERMINE TIME"— Presentation transcript:
1THE EARTH IN SPACE The Earth in Space HOW WE DETERMINE TIME USING THE SUN ANDEARTHThe Earth in Space
2Objectives What is rotation and how does it affect Earth What is revolution and how does it affect EarthBe able to compare and contrast rotation and revolutionHow day and night are determinedHow a year is determined
3Determining Day and Night Axis – an imaginary line that goes through a planet, moon or other space object. The space objects “spins” on that line like a wheel on an axle.
4Rotate -To turn around an axisDetermining nightand day
8Revolution – one object moving around another Period of Revolution - the time it takes one object to move around anotherIt takes the Earth 365 ¼ rotations to make 1 revolution around the sunso we have 365 ¼ days pr yearThese are counted for 3 years and on the 4th year we add the quarters up for 366 days and add that day in February – LEAP YEAROrbit – the path an object takes to move around another objectDetermining a planetary year
9In your science notes create a double bubble thinking map to compare Period ofrotationPeriod of revolutionIn your science notes create a double bubble thinking map to compareAnd contrast Rotation and Revolution - remember you may have more bubblesthan what is represented in the diagram above