Students watch the video for two times. At first, they do not study the exercises. You can choose "watch without quiz" option for this. At second watch, they complete the exercises. 

Earth manages to contact a planet and asks for help about technology but we understand that this is not happening for the first time for the planet contacted. 

First Contact - Earth Contacts Other Planets

first-contact-earth-contacts-other-planets

Students watch the video for two times. At first, they do not study the exercises. You can choose "watch without quiz" option for this. At second watch, they co…