Year 8 Space Flashcards
What does gravity affect
Anything with mass
What is mass measured in?
Kg
When is gravitational attraction strongest?
Close to a large mass/body
What is gravity
The force that keeps us on the earth
What is weight?
The force of gravity
What is the unit of weight
Newton’s (N)
Learn
W = m * g
What is earth’s gravitational field strength?
10N/kg
What is planet earths tilted axis in degrees?
23.5 degrees to vertical
How many days does it take the moon to orbit the earth?
27
What is a solar eclipse?
Moons orbit between sun and earth
What is a lunar eclipse?
Earth between sun and moon
When was sputnik I placed into orbit?
1957
What are satellites used for?
- Communication
- Taking photos of the earth
- GPS ( global positioning system)
- Taking photos of stuff in space.
What do geostationary satellites do?
Stay above the same place on earth.
Match the earths rotation (24 hrs).
Use for communication and TV.
What do polar orbiting satellites do?
Pass over N and S pole.
Orbit above the earth.
Used for mapping, GPS, spying and monitoring.
What is 1 lightyear?
The distance light travels in a year.
What is 1 lightyear equal to?
1 ly = 300,000,000 x 365 x 24 x 60 x 60m
How far away is the nearest star?
4 light years
