You exert force when you open and close a door.

The Southern Hemisphere receives the most sunlight of the year around June 21, on the summer solstice.

The moon is Earth's only natural satellite.

Which of the followings are the planets visible from Earth without a telescope?

A star is mainly composed of

The streak of light produced when a small object burns up entering Earth's atmosphere.

A cold mixture of dust and ice that gives up a long trail of light as it approaches the sun.

Most constellation names today come from the ancient Greeks, who probably took them from ________________________.

What is the constellation's name?

What is the constellation's name?

Big Dipper is part of constellation ________________.

which of the following about the Big Dipper is True?

______________ is commonly called the North Star. It is located close to the sky's North Pole.

The apparent motion of objects in the sky depends on ____________________.

The planets all orbit the sun in about the same plane, they appear to move through a narrow band in the sky called _____________.

You can see ________________only in the evening or morning because they are closer to the sun than Earth and so they always appear close to the sun.

Which of the following is the brightest object in the night sky, other than the moon?

Tool that helps you find constellations in your location and season

A planet is large enough to have been rounded by its

You can match constellations to your location and the season using a GPS receiver.

Planets appear to move against the background of stars.

Different cultures have identified the same constellations.

The North Star is the brightest object in the night sky.

Path of Earth as it revolves around the sun called _____________

Movement of Earth around the sun

When the noon sun is directly overhead at the equator

defines the beginning, length, and divisions of a year

Earth is closest to the sun when it is summer in the

Each of the two days of the year when neither hemisphere is tilted toward or away from the sun is called a(n)

Earth has ____________________because its axis is tilted as it revolves around the sun.

Earth's ______________causes day and night.

Earth's orbit is a slightly elongated circle, or _____________.

The _______________________occurs around March 21 in the Northern Hemisphere.

The amount of matter in an object

The force of gravity decreases rapidly as distance increases.

If the distance between two objects doubles, the force of gravity decreases to one fourth of its original value.

An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Newton concluded that _________________combine to keep Earth in orbit around the sun and the moon in orbit around Earth.

An object with greater _________________________is more difficult to stop or start.

Earth's gravity pulls the moon inward.

______________: a pull or a push

_______________ states that every object in the universe attracts every other object

What keeps Earth from falling into the sun?

The ancient Egyptians created one of the first calendars.

Earth's orbit brings the planet closest to the sun in ________________.