Big Bang
About how long ago do scientists believe the universe began?
13-14 billion years ago
Which planet rotates on its axis in the opposite direction than the rest?
Venus
The largest object in our solar system is
Our sun
What part of the moon do we see from Earth?
The same side
The spinning of an object on its axis is called___
rotation
What is the origin of the universe called?
The Big Bang
This planet is the largest in our solar system?
Jupiter
Our universe is
expanding
The moon seems to change shape from day to day in a cycle that lasts about a month as it goes through_
phases
One complete revolution of the Earth around the sun takes about.
One year
What theory of the Universe did Ptolemy believe in?
Geocentric Theory
This type of planet has a solid surface?
terrestrial
The name of our galaxy is
The Milky Way
As the moon’s shape appears to get smaller, we say that the moon is _
Waning
When the moon is over 50% illuminated it is called_
Gibbous
This astronomer confirmed the heliocentric theory with his telescope
Galileo
What two forces keep the plants in their orbits around the sun?
Gravity and inertia
The inner and outer planets are separated by..
The asteroid belt
About how long does it take the moon to make one complete cycle around the earth?
28 days
A _occurs when the Earth is directedly between the Sun and the Moon
Lunar Eclipse
What theory of the universe did Copernicus believe in?
Heliocentric theory
This type of planet has no solid surface.
Gas giant
Earth’s rotation causes?
seasons
Which moon phase is when you can’t see the moon at all?
New Moon
A _ is a burning body of matter that has entered Earth's atmosphere; "shooting star"
Meteor