The Universe
Our Solar System
Theories and More
Earth, Moon, and Sun
More Earth, Moon, and Sun
100

The leading theory of how the universe was formed

What is the Big Bang

100
The theory of how our solar system was formed
What is the Nebula Theory
100
The evidence that Hubble found to support Lamatre's Big Bang Theory
What is Red Shift
100
When the moon is in new moon phase and obscures our view of the sun
What is a solar eclipse
100
The time it takes for the moon to make one counter-clockwise revolution around Earth
What is 29.5 days
200
All matter and energy in the universe started as
What is a singularity that expanded rapidly and is still expanding today
200
A nebula cloud was hit by a super nova explosion, then...
What is it collapsed, our sun exploded into light and the debris from the explosion formed our planets
200
Evidence for the Big Bang that is found in every part of space that we have tested and was first discovered in the 1960s
What is cosmic background microwave radiation
200
The moon is in the full moon phase and passes into Earth's shadow
What is a lunar eclipse
200
The light on the moon always travels in this direction
What is from right to left
300
All matter and energy both known and unknown, the cosmos
What is the Universe
300
The eight planets of our solar system
What are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
300
Our nearest galactic neighbor, Andromeda, is more than 4 light years away. A light year is...
What is the distance light travels in one year
300
When the moon is in either new moon or full moon phase (aligned with the sun) we have this type of tide
What is Spring Tide
300
When the Northern hemisphere is tilted toward the sun we are in this season
What is Summer
400
The galaxy to which we belong
What is the Milky Way
400
The name of the star in our solar system
What is the sun (Sol)
400
The unit used to measure distances within our solar system
What is Astronomical Unit (AU)
400
When the moon is in 1st quarter or last quarter (perpendicular to the sun) we have this type of tide
What is Neap Tide
400
When the Northern hemisphere is experiencing fall, the southern hemisphere is experiencing this season
What is spring
500
The force that holds our galaxy together
What is gravity
500
The direction in which all planets orbit the sun
What is counter-clockwise
500
The distance represented by an Astronomical Unit (AU)
What is 150,000,000 km (93,000,000 miles)
500
The difference in high and low tides during a Spring tide
What is higher high tides and lower low tides
500
The phase just before and just after a full moon
What is gibbous
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