Chapter 15, Annex T ANSWERS TO MOONS VIDEO WORKSHEET

1.How long ago do scientists think that Earth’s moon was formed? 4.5 billion years

2.How many years did NASA’s Galileo probe spend exploring Jupiter’s moons? 8 years

3.What lies under Europa’s frozen crust? A liquid ocean

4.What year did the European Space agency launch Cassini-Huygens? 1997

5.How long did it take the Cassini-Huygens probe to travel to Saturn? 7 years

6.What kind of scientist is the narrator, Athena Coustenis? Astrophysicist

7.What is Saturn’s most distant moon? Phoebe

8.What year did Jean-Dominique Cassini discover Saturn’s moon Iapetus? 1671

9.Half of Iapetus is dark as coal; what is the other half? Bright as snow

10.What runs around the equator of Iapetus? An icy ridge

11.What is the largest moon of Saturn? Titan

12.What year did the Cassini spacecraft release the Huygens probe to visit Titan? 2005

13.How long did Huygens operate on Titan’s surface? Barely a few minutes