Space Review

How does the energy produced by the sun travel to earth?

• By the magnetic fields between the sun and Earth

• By the convection of heat through particles in space

• By the radiation of electromagnetic waves through space

• By the process of conduction of heat between the sun and Earth

A new planet is discovered orbiting a single star. The planet has one moon. According to Kepler's first law, what do scientist know about the orbit of the planet around the star?

• The orbit is circular with the star at the center of the circle.

• The orbit is elliptical with the star at one focus of the ellipse

• The planet takes 12 times longer to orbit the star than the moon takes to orbit the planet

• The planet orbits the star in a direction opposite to the direction of the moon's orbit of the planet

Structures in the universe are grouped into large systems, each of which are made up of smaller systems. Which of the following is the largest system of which Earth is only a very small part of?

• Jovian planets

• Halley's comet

• Milky Way galaxy

• Orion's belt

Earth travels on an elliptical orbit around the sun. Which best explains the more rapid motion of Earth?

• The amount of solar heat reaching Earth is greater

• The sun's gravitational pull on Earth is stronger

• Earth is closer to the suns magnetic field

• Earth is closer to the suns radioactivity

What is most likely to occur when the sun, moon, and Earth are aligned in a relatively straight line?

• A decrease in global wind patterns

• an increase in temperature near the equator

• more earthquakes near the equator and fewer at the poles

• a larger-than-normal height difference between low tide and high tide

In some years, the month of February has 29 days instead of 28 days. Why is it necessary to sometimes add a day to the claendar?

• The speed at which the Earth orbits the sun varies

• It takes the moon about 27 days to revolve around the sun

• It takes the Earth 365.24 days to revolve around the sun

• The moon can complete more than one full cycle in some months

What type of galaxy is the Milky Way

• spiral

• elliptical

• irregular

• oval

Classification of galaxies is based on which characteristic?

• the color of the galaxy

• the shape of the galaxy

• how many stars make up the glaxay

• how many planets make up the galaxy

Scientist have collected data about many galaxies, including the Milky Way. What makes the Milky Way galaxy difficult to observe from Earth?

• Earth is located inside of the Milky Way galaxy

• The Milky Way galaxy absorbs more light than it emits

• The Milky Way galaxy is too distant for detailed observations

• Earth is moving in the opposite direction of the Milky Way galaxy

In which structure is the Sun located?

• Milky Way galaxy

• Andromeda galaxy

• Cat's Eye Nebula

• Horseshoe Nebula