Slide 1If Rocks Could Only Talk, What Would They Tell Us? Slide 2 How Old is the Earth? 1 million years old? 1 million years old? 1 billion years old? 1 billion years old?…
Slide 1 Slide 2 Phylum = Porifera › Scientific name = Calcareous sponge Common Name = Yellow Calcareous Sponge Slide 3 Phylum = Porifera › Scientific name…