1.Vocabulary
A huge ball of gases
What is a star?
____ shine with their own light.
What is a star?
A group of stars that form a distinct pattern as viewed from Earth
What is a constellation?
The ____ is the nearest star to Earth.
What is the sun?
The amount of ______ ________, or pull, between two objects also depends on how far apart they are.
What is gravitational force?
A curved path around an object
What is an orbit?
The sun is a _____-sized star.
What is medium?
Science has proven that our planet is round not flat, this means that our planet is a _____.
What is a sphere?
Orbits are the result of ______.
What is gravity?
________ ________ affects how fast an object falls.
What is air resistance?
What is visible about something by looking at it
When the Earth casts a shadow on the moon during a lunar eclipse, the shadow is _____.
What is curved?
Each planet travels in a curved path around the sun called an _____.
What is an orbit?
The more _____ an object has, the stronger its gravitational pull is.
What is mass?
What goes ____ must come _____.
What is up and down?
A noncontact force of attraction between two objects
What is gravity?
If the ground were not in the way, objects would continue to fall all the way until they reached ______.
What is the center of the Earth?
Observers of the sky have placed stars into groups, these groups of stars form a distinct pattern and are called _____.
What is a constellation?
_____ and ______ vary depending on how close or far away a star is from the Earth.
__________ was the first person to study gravity over 300 years ago.
Who is Sir Isaac Newton?
A solid shape that is curved everywhere and every point on its surface is the same distance from its center
What is a sphere?
__________ was the first person to prove stars were far away.
Who is Friedrich Bessel?
An object's _____ brightness is how bright it looks as we view it.
What is apparent?
Friedrich Bessel's method to measure the distance of a star is called _______.
What is parallax?
A diagram of Earth with arrows pointing toward it all around show the Earth's _______ ____.