The lunar tides on Earth are making the Moon recede from Earth.

The lunar tides on Earth are making the Moon recede from Earth.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

Nuclear reactors use nuclear _____________ to generate energy whereas the Sun uses nuclear ____________ to generate energy.
 
  Fill in the blank(s) with correct word

Question 3

Kepler completed the Rudolphine Tables.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 4

A __________________ cycle lasts 11 years, whereas a ________________ cycle lasts 22 years.
 
  Fill in the blank(s) with correct word