English 9 - Test 506
Read the following passage, then choose the correct answer to question: Planet earth is part of a system of planets and their moons, as well as numerous asteroids and comets which (1)_________around a huge star we call the Sun. The Sun itself (2)_________of gas. Nuclear reactions inside its core (3)_______the heat and light that make life on the Earth (4)________. The Earth is the third of four small terrestrial (Earth like) planets that orbit close to the (5)________. Further out in our Solar System are four huge gas planets, while distant Pluto, (6)________ planet, is made (7)_________rock and ice. Our Earth is one of the ten planets that orbit the Sun- a huge, burning-hot star in the center of our Solar System. The Solar System and all the stars in the (8)________are part of our galaxy-the Milky Way, which (9)_______as many as 200 billions stars. Beyond our galaxy (10)________millions more galaxies. They all add together to make up the Universe.
|