1.
The pereodic rise and fall of the oceans's surface is the ____________________.
A. 
B. 
C. 
D. 
2.
The appearance and shape of the moon as you see it from Earth is called a ______________________.
A. 
B. 
C. 
D. 
3.
When the Moon moves into the Earth's shadow,a _____________________ occurs.
A. 
B. 
C. 
D. 
4.
When the Moon passes directly between the sun and Earth,a _________________heppens.
A. 
B. 
C. 
D. 
5.
The time from one phase of the Moon until the next time the Moon reaches the same phase is _______________ .
A. 
B. 
C. 
D. 
6.
As _______________ rotates,the tides move around the planet.
A. 
B. 
C. 
D. 
7.
The phases of the moon are caused by the revolution of the Moon and the Earth.
8.
What causes the light that shines from the Moon come from?
A. 
Light from the Sun that reflects off the Moon's surface
B. 
Light from the Sun that reflects off the Earth
C. 
Light from the sun that reflects off mars
D. 
Light from the earth that shines on the Moon
9.
This galaxy includes the _____________________, which has the Sun at its center.
A. 
B. 
C. 
D. 
10.
The solar system also has rocky asteroids and icy ______________________that orbit the Sun.
A. 
B. 
C. 
D. 
11.
The force of attraction between any two objects is ______________.
A. 
B. 
C. 
D. 
12.
The strength of gravity increases as the _______________ of objects increases and decreases as the distance between objects increases.
A. 
B. 
C. 
D. 
13.
A path that one object takes as it moves around another object is its ___________________________.
A. 
B. 
C. 
D. 
14.
Moving objects have the tendency to keep moving in a straight line; this is called __________________.
A. 
B. 
C. 
D. 
15.
Every year, Earth makes one complete trip, or ______________, around the Sun.
A. 
B. 
C. 
D. 
16.
Sunlight strikes Earth differently at different times of year because Earth’s axis is _____________.
A. 
B. 
C. 
D. 
17.
The changes in the angle of sunlight on Earth’s surface cause the _________________.
A. 
B. 
C. 
D. 
18.
Rocks striking the Moon over billions of years have formed many _________________.
A. 
B. 
C. 
D. 
19.
When the Moon moves into Earth’s shadow, a ___________________occurs.
A. 
B. 
C. 
D. 
20.
The orbiting Hubble Space Telescope “sees” objects more clearly than Earth-based telescopes because Earth’s _____________ does not change Hubble’s view.
A. 
B. 
C. 
D. 
21.
Radio telescopes are giant dishes on Earth’s surface that gather __________________waves from objects in space.
A. 
B. 
C. 
D. 
22.
The solar system’s moons are natural ____________________,but artificial satellites orbit Earth to gather weather data
and help people communicate.
A. 
B. 
C. 
D. 
23.
Most of the solar system’s _______________________orbit the Sun in a belt between Mars and Jupiter.
asteroids
A. 
B. 
C. 
D. 
24.
Balls of ice, dust, and rock in elongated elliptical orbits comets around the Sun are __________________
A. 
B. 
C. 
D.