The layers of rocks, the ancient treasures that are at the bottom of the sea, how old the coral is. But I don't think they determined how old it is, how would the dinosaurs that lived in water swim or any drink water. I don't know if this helps but hopefully it does. Also scientist have made advanced tech that could help with the age determination of the ocean floor.
Answer: Basically groundwater is created when precipitation seeps into the soil, so if there was a drought and it hardly rained, the groundwater could be considered an unrenewable resource until it rained again.
Explanation:
Answer:
D
Explanation:
Normal wings, brown body, legs on head, and red eyes.
Out of the choices given, one adaptation that is unique to marine mammals is they can slow their own heartbeat down.
Here is one possible answer:
Do allergen-free pillows cause fewer germs to grow