How did the big dipper get it's name?

the answers for the whole quick check is

1. b

2. b

3. a

4. c

5. b

6. a

7. d

the precambrian aged rocks could be found in australia. australia is a region that has a lot of ancient civilization history from million years ago. in this region, there are a lot of recognizable fossils buried in its land which is considered a precambrian-aged rocks