Which model of the universe has the Earth at the center?

Who created a telescope and studied Jupiter's moons?

Who came up with the idea of gravity?

Which astronomer first suggested that the sun is at the center of the solar system?

The sun is at the center of our solar system

The sun is at the center of the universe

Who were the astronomers who agreed with the geocentric model? (two)

Who did propose that planets move in ellipses?

According to Kepler, planets move slowly when they are near the sun.

How many stars are in our Solar System?

Which of these planets is the farthest from the sun?

Which is the largest planet in our Solar System?

Which planet is sometimes called the "red planet"?

Which of these sets of planets are terrestrial planets?

What is in our Solar System?

Which planet is the hottest in the Solar System?

Which planet is the sixth from the sun?

Which planet has the Big Red Spot?

Which planet is Earth's sister planet?

About how many days does it take to revolve around the sun on Earth?

Which planet is third from the sun?

There are _________ planets in our solar system.

The closest four planets are called the ________ planets.

The furthest four planets are called the _______ planets.

Mercury, Venus, Earth, and Mars are known as _____________ planets.

Jupiter, Saturn, Uranus, and Neptune are know as ________ planets.

___________ are similar to planets but are not large enough to have cleared their orbital region of other objects.

___________ are objects made of ice, dust, and rocks that orbit the Sun.

The _________ is a region between the planets Mars and Jupiter containing thousands of rocky objects that orbit the Sun.

The ___________ is a region of thousands of small bodies that exists outside the orbit of the planets. Objects in this area consist of "ices" such as ammonia, water, and methane.

The _______ exists much further out than the Kuiper belt and is at the very edge of the Solar System. Scientists believe it is made up of thousands of small ice objects.

___________ was once considered a full planet but was redefined as a dwarf planet in 2006.

About 99.85% of the mass of the solar system is the __________.

The inner and outer planets are separated by the __________.

About 4.6 billion years ago, a cloud of stellar dust or nebula exists within the Milky Way. What happened next?

Supernova of a nearby star occurs. Then what?

Shock waves hit the nebula causing it to collapse. Then what?

The energy enriched nebula begins to contract further due to gravity. Then what?

The nebula begins to spin and flatten. Then what?

Gravity causes light gases to move to the center while heavier materials and ice stay in outer areas. Then what?

The center of the nebula begins to get hot and dense. Then what?

A protostar forms in the center of the nebula. Then what?

Planetesimals (small rock or icy bodies) begin to form. Rocky pieces in the outer rings and icy pieces in the inner rings. Then what?

What is the FIRST event in the formation of the solar system?

Most of the material that was originally in the nebula collapsed to form

The process of smaller rocks coming together to form larger rocks, and then those come together to form planetesimals, and those come together to form planets; as well as moons, asteroids, and dwarf planets is celled

List the inner planets.

The outer planets are

Which of these is a difference between the inner and outer planets?

The outer planets are also known as the Jovian (Jupiter-like) planets or gas giants.

What do scientists think the two factors are that caused the inner and outer planets to be made up of, or to be composed, of different things?

The path of each planet’s orbit is