Practice test Flashcards
List the planets from the sun outward.
As you are closer to the sun and move outward, the inner planets are: Mercury, Venus, Earth, and Mars. The outer planets are: Jupiter, Saturn, Uranus, and Neptune.
The word umbra is defined as:
an area of dark shadow
The smallest of all the planets is _____.
Out of all the planets, the smallest one is Mercury.
An apparent group of stars that seem to form a group because of our point of observation is referred to as a _____.
By definition a constellation is an apparent group of stars which seem to form a pattern and are given a name.
A _____ is a group of constellations held together by gravity.
By definition a cluster is a group of constellations held together by gravity.
The best definition for something described as apparent is:
Apparent refers to recording something as observed or noted.
The word _____ is defined as either of two points when the sun’s rays strike the earth at the equator.
The word equinox is defined as either of two times when the sun’s rays strike the earth at the equator.
The Earth’s year is _____ days long.
365.26
The word _____ is defined as the point at which an astronomical object is at its closest point to the object it rotates around.
The word perihelion is the point at which an astronomical object is at its closest point to the object it rotates around.
The winter solstice occurs on _____.
In the northern hemisphere, the summer solstice is on June 21 or 22, and the winter solstice is on December 21 or 22.
The amount of light that a star actually produces is its _____ brightness, or magnitude.
The amount of light that a star actually produces is its absolute brightness, or magnitude.
The word _____ is defined as either of two points when the sun’s rays strike the earth furthest from the equator.
The word solstice is defined as either of two points when the sun’s rays strike the earth furthest from the equator.
What was the first manned spacecraft to reach the moon?
The first manned mission to the moon was Apollo 11. On July 20, 1969, Neil Armstrong stepped from his lunar lander and stepped on the surface of the moon.
The Great Red Spot is a storm that rages on _____.
The Great Red Spot is a storm that rages on Jupiter.
_____ are glowing balls of fire.
Stars, like our sun, are glowing balls of fire.
The _____ space mission first landed men on the moon.
Apollo 11
What is the length of the lunar month?
The moon’s revolution around the earth and its rotation on its axis take exactly the same period of time—27.3 Earth days.
The photosphere refers to _____.
The photosphere refers to the innermost layer of the sun’s atmosphere, which lies next to the sun’s core.
The definition that refers to having to do with a special curve, which is described as the intersection of a plane with a cone, describes the word _____.
The word parabolic refers to having to do with a special curve, which is described as the intersection of a plane with a cone.
An undesirable effect caused by a defect, such as color or the twisting of an image by the lens of a telescope describes the word _____.
An aberration refers to an undesirable effect caused by a defect, such as color or twisting of an image by the lens of a telescope.
The word eclipse is defined as:
The word eclipse is defined as the hiding of an astronomical object by another.
Stars are fueled by a nuclear process called _____.
Stars, like our sun, are glowing balls of fire. They are fueled by a nuclear process called fusion.
The corona refers to _____.
The corona refers to the outermost layer of the sun’s atmosphere consisting of light gases.
The chromosphere refers to _____.
The chromosphere refers to the middle layer of the sun’s atmosphere, which is considered to be the sun’s surface.
The word penumbra is defined as:
The word penumbra is defined as an area of light shadow.
The earth is _____ miles from the sun.
90,000,000
The Earth’s average orbit is _____ miles around the sun.
93 million
The word _____ is defined as the point at which an astronomical object is at its furthest point from the object it rotates around.
The word aphelion is defined as the point at which an astronomical object is at its furthest point from the object it rotates around.
More than _____ percent of all stars fit into the category of Main Sequence stars.
The Main Sequence stars account for about 90 percent of all stars.
The death of a low-mass star leads to the _____ formation.
nebula
