Matter, waves and speed
What is matter?
Anything that has mass and takes up space
Main stars composition
Hydrogen and helium
Explain the heliocentric model.
The planets travel around the sun.
Definition of a day in a planet
The time it takes a planet to complete one full rotation on its axis
The acronym NASA means..
National Aeronautics and Space Administration
What is speed?
Measure of how far something moves in a given amount of time
It is the name of our galaxy
Milky way galaxy
What is centripetal force?
Force that causes an object to move in a circular path
What happens at an equinox?
Sunlight shines equally on the Northern and Southern Hemispheres
Race between two nations to conquest space
Space Race
What determines pitch?
The frequency and wavelength of a sound wave.
What is a black-hole?
Invisible object with gravity so great that nothing can escape it.
+5 points (when its formed?)
What is the revolution period of a planet?
The time it takes to an object to orbit around the sun
What is a tide?
Daily changes in the level of ocean water.
+5 points (what is the cause of this)
How do people travel to space?
Rockets and space shuttles
+5 points (differences between them)
The Law of Conservation of Mass states...
Mass is not created or destroyed but is only transformed into different substances.
Types of planets in the solar system (Groups and names )
Terrestrial planets (M,V,E,M) and Gas giant planets (J,S,U,N)
+5 points (Differences)
Kepler's contributions
Kepler's three laws about the elliptical orbit of the planets around the Sun
What happens at an eclipse?
One object in space casts a shadow onto another
Uncrewed technologies to explore space (name 5)
Telescopes, Satellites, Orbiters, Rovers, Landers.
Electromagnetic spectrum in order of wavelenghts
Radio, Microwaves, Infrared, Visible light, UV, X-rays, Gamma rays
Types of galaxies
Spiral, Elliptical, Irregular
+5 points (Explain the shapes)
Explain the differential rotation.
The sun rotates faster at its equator than it does in the poles
How are seasons determined?
By a pattern of temperature and weather trends.
Difference between Optical telescopes and Non-optical telescopes
Optical telescopes collect visible light,
Non-optical telescopes collect all parts of the EM spectrum.