Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/23

Click to flip

23 Cards in this Set

  • Front
  • Back
CHROMOSPHERE
The middle layer of the sun's atmosphere. From the Greek work, chromo, meaning color (so the chromosphere is the "color sphere").
REVOLUTION
The movement of one object around another object.
PENUMBRA
The larger part of the shadow cast by the moon; less dark than the umbra.
ROTATION
The Earth's spinning on its axis
MARIA
Dark, flat parts of the moon's surface; Galileo named these after the Latin word, mare, for seas. Maria are areas that were flooded by molten rock billions of years ago.
ORBIT
Earth's path as it revolves around the sun.
UMBRA
The darkest part of the moon's shadow, which is cone shaped.
PHASES
The different shapes of the moon you see from Earth.
SOLAR FLARES
Explosions that occur when the loops in sunspot regions suddenly connect, releasing large amount of energy. The energy heats the gas on the sun causing the hydrogen gas to explode out into space.
ASTRONOMY
The study of the moon, stars and other objects in space.
SUNSPOTS
Areas of cooler gases in the photosphere. They usually occur in pairs or groups.
ECLIPSE
When the moon's shadow hits Earth or Earth's shadow hits the moon.
PROMINENCE
A huge, looping eruption of gas through the chromosphere.
CORONA
The outer layer of the sun's atmosphere, which looks like a white halo around the sun; from the Latin for "crown". Only visible during eclipses from special telescopes.
SOLAR ECLIPSE
When the moon passes between Earth and the sun, blocking the sunlight from reaching Earth.
PHOTOSPHERE
The inner layer of the sun's atmosphere. From the Greek word, photo, meaning light (so photosphere means the sphere that makes light).
GOLDILOCKS CONDITIONS
Favorable conditions for living things to survive; i.e., on Earth the temperature is not too hot and not too cold.
EXTRATERRESTRIAL LIFE
Life other than that on Earth.
AXIS
The imaginary line that passes through Earth's center and the North and South poles.
THE VIKING MISSIONS
A series of unmanned space missions in the 1970's that explored the planet Mars. Each of the Viking landers carried a compact biology lab meant to search for life forms.
EUROPA
One of Jupiter's moons that scientists think may have th conditions necessary for life to develop. It has a very smooth, icy crust with giant cracks in it, and water may be underneath.
LUNAR ECLIPSE
Occurs at a full moon when Earth is directly between the moon and the sun.
CORE
The sun's cener where the temperature reaches about 15 million degrees Celsius, high enough for nuclear fusion to occur.