Sign of the Rainbow - Bible Study

Why were there two of some animals and seven of others that were brought onto the ark? What is the rainbow for? These and many more answers can be found in this Bible study.

Verses used in this Bible study:
Genesis 6:5-8,13,14,19,22
Genesis 7:1,2,7,16,17,21,22,24
Genesis 8:1,6-8,15,16,20
Genesis 9:1-9,12-17
1 John 2:2
Acts 10:43
John 3:16,18