Astronomy Review

Which statement describes the motion of Earth around the sun?

• The speed of Earth is constant regardless of its distance from the sun.

• The speed of Earth is constant because the distance remains the same between Earth and the sun.

• Speed increases the farther Earth is from the sun and decreases the closer it is to the sun.

• Speed increases the closer Earth is to the sun and decreases the farther it is from the sun.

f it is summer in the northern hemisphere, which statement is true?

• Earth has changed the tilt of its axis by 20 degrees due to its revolution.

• It is winter in the southern hemisphere due to the tilt of Earth’s axis.

• It is summer in the southern hemisphere due to the tilt of Earth’s axis.

• Earth has reached its closest point to the sun due to its revolution.

How does a straight alignment between Earth, the sun, and the moon (spring tide) impact the tides on Earth?

• It produces the greatest change in high and low tides.

• It produces the least change in high and low tides.

• It produces semidiurnal tides.

• It produces diurnal tides.

Which statement BEST summarizes The Big Bang Theory?

• whole universe began as a black hole and rapidly expanded, but is now collapsing

• whole universe began as a hot dense point, rapidly expanded, and continues to expand

• whole universe began as a cool dense point and rapidly collapsed, but is now expanding

• the whole universe began as a hot dense point and rapidly expanded, but is now collapsing

Which two element make up most of the sun?

• helium and hydrogen

• hydrogen and oxygen

• ammonia and methane

• oxygen and helium

How was the moon formed?

• It formed when the Earth was formed

• Planetary body smashed Earth, piece broke off and became the moon

Which describes the difference between nuclear fission and nuclear fusion?

• Nuclear fission is the process that produces the radiant energy of stars, and nuclear fusion splits a heavier nucleus into smaller nuclei.

• Nuclear fission splits a heavier nucleus into smaller nuclei, and nuclear fusion is the process that produces the radiant energy of stars, by coming together.

• Nuclear fission produces the energy in the core of the Earth, and nuclear fusion produces energy in nuclear power plants.

• Nuclear fission produces energy in nuclear power plants, and nuclear fusion produces the energy in the core of the Earth.

How does heat from the sun get to Earth?

• By radiation, using electromagnetic waves to transfer the heat.

• By convection, using liquids and gases to transfer the heat.

• By conduction, using solids to transfer the heat.

• By absorption, using primary waves to transfer the heat.

One of the main differences between the outer and inner planets is __________.

• The inner planets all have water

• the outer planets are gas planets

• the inner planets are much bigger than the outer planets

• the outer planets have rings, and the inner planets don't

As the solar system formed, two types of planets were produced. Which statement is a fact that helps account for the difference in composition between terrestrial and the Jovian (gas) planets

• The farther from the Sun, the cooler the temperature is.

• Metallic elements have lower melting points than nonmetallic elements

• Large planets have less stable orbits than small planets

• none of these