A) a planet
B) a star
C) a moon
D) a comet
A) My teacher put a red star on my paper.
B) A star is a hot, glowing ball of gases.
C) I know that man is a famous rock star.
D) That lady is a pretty movie star.
A) The planets that have moons.
B) The ones that are farthest from the sun.
C) The red planets are the hottest.
D) The planets that are closest to the sun.
A) It is just too close to the sun.
B) It has a long orbit.
C) It is such a small planet.
D) It is so rocky.
A) It is the closest planet to the sun.
B) The planet has no water.
C) It is just too cold on this planet.
D) It would spin sideways.
A) The ones closest to the sun.
B) The ones farthest away from the sun.
C) The reddest planets are the warmest.
D) The ones with frozen ice.
A) at the center of the Earth
B) at the center of the galaxy
C) at the center of the universe
D) at the center of the solar system
A) ten thousand degrees
B) one million degrees
C) five thousand degrees
D) twenty seven million degrees
A) It is a small star.
B) It is the largest known star.
C) It is an average-sized star
D) It is the hottest star.
D) electrical power
A) Pluto: It may not be a "true" planet.
B) Jupiter: It is too big to be a planet.
C) Earth: It has living things.
D) Saturn: It has so many rings.
1.B 2.D 3.A 4.A 5.B 6.C 7.B 8.A 9.B 10.A 11.D 12.D 13.C 14.A 15.A