Lesson 1
___________ is the force of attraction between any two objects, especially referring to an object and earth.
Gravity
Earth makes one complete spin on its' axis is the period of 24 hours. What is the vocabulary word that means one spin?
Rotation
We live in the galaxy known as the ________ Way?
Milky
About how many days does it take the Moon to orbit around the Earth?
29-30
What is the habitable zone?
Earth is located in the habitable zone which is the perfect distance from the sun to sustain life.
The Moon's gravitational force causes the regular rise and fall of water along the shore. What is this rise and fall of water called?
Tides
How many days does it take Earth to make one revolution around the Sun?
365 1/4 or 365.25
A ________ is a large, round object that orbits a star.
Planet
The apparent shape of the Moon in the sky are called Moon __________.
Phases
Why do some stars seem brighter than others?
Due to the closer proximity or distance from Earth.
A _________ is a space rock that enters Earth's atmosphere.
Meteor
In which season does the Sun appear much lower in the sky?
Winter
Which planet is our solar system is closest to the Sun?
Mercury
A _________ is a sphere of hot, exploding gas that gives off light and heat.
Star
We have leap years every ____ years.
4
What is the difference between and meteor and meteorite?
A meteorite is a meteor that strikes Earth.
What is an ancient device that could help people track time using shadows?
Sundial
Scientists who had become experts at charting the position of the night sky's brightest stars are called?
Astronomers
True or False? Stars move across the night sky.
False, the Earth is rotating which causes apparent motion of the stars.
What is the importance of time zones?
Due to Earth's rotation the sun hits different areas of Earth at different times
Earth's gravity is # times more powerful than the gravity on the moon?
6 times
The path a revolving object, like Earth, follows is called its ____________.
Orbit
True or False? Planets in our solar system make their own light.
False, planets reflect light from the sun
Locating certain constellations like Polaris can lead travelers specific directions.
What happens to shadow throughout the day?
The grow and shrink depending on the location of the sun in the sky.