SUN MOON EARTH

• Rotation - It refers to the movement of the earth on its axis.
• Corona - The outer layer of the sun's photosphere.
• Our Solar System consists of eight major planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune) and their moons, asteroids, comets, and other objects.
• Sunspot - These are dark areas on the surface of the sun.
• Revolution - It refers to the movement of the earth around the sun.
• Phases - The moon appears to change shape from day to day in a cycle that lasts about a month as it goes through
• Waxing - Phases of the moon in which the moon appears to be getting larger are referred to as
• 8 - How many phases does the moon have?
• rotation of earth on its axis - Day and night are caused by the  _______
•   365 1/4 days - How long does it take Earth to make one complete revolution around the sun?
• Orbit - What is the path that a planet follows around the Sun?
• Perihelion - The place where a planet is closest to the Sun
• Aphelion - The place where a planet is farthest away from the Sun 
• New moon - The moon is not visible in the night sky during which phase? 
• Full moon - Lunar eclipses always occur during a 
• First Quarter - sun, earth, and moon are at 90 degrees angle. 
• Waxing Phase - half bright and half dark 
• FULL MOON PHASE - when the sun, earth, and moon align; the moon's entire side is seen on Earth. 
• Third Quarter Moon - side facing earth is again half bright and half dark. 
• Waning phase - visible part becomes smaller
• New Moon Phase- the moon is no longer visible in the sky. 
• Crescent moon - less than half of the moon is seen in the sky
• Gibbous moon - more than half of the moon is seen in the sky
•  photosphere - The sun is primarily composed of hydrogen and helium gases. As viewed from the earth, the glowing layer of gases on the surface of the sun is called.
• photosphere - The____ is the first layer of the sun.
• Chromosphere - The second layer of the sun is called ____________. It is also known as the "coloured sphere".
• Corona - The third layer of the sun is called __________________ . This layer extends out into space beyond the chromosphere.
•  Sunspots -  are the dark areas on the surface of the sun. They are found in the photosphere.
• solar flares - Sometimes, flashes of bright light are visible on Earth. These are called ____
• rotation - Earth spins  on its axis. This movement is called.
• Revolution - When Earth rotates, it also revolves around the sun in an elliptical orbit. This entire trip around the sun is called _____
• Albedo - The degree to which a surface reflects light.
• solar eclipse - occurs when the MOON passes between the Earth and the Sun, and its shadow falls on the Earth.
• lunar eclipse - occurs when the Earth passes between the moon and the sun, and its shadow obscures the moon. 
• TIDES - the rising and falling of the water level that occurs during the day.
• The pull of the moon's gravity causes the Earth's tides
• High tide - rise in water level; which usually happens every 12 hours. 
• Low tide - occurs when water falls to its lowest level
• SPRING TIDES - During the new moon and full moon, the lunar and solar tides produce larger tides called ___
• Neap tides - At the first and last quarters of the moon, the lunar and solar tides produce smaller tides called ___