Answer:
fossil record of dinosaurs
Explanation:
geologists used fossils, meteor rocks, and rocks to figure out that earth was 4.6 billion years old
Yes, Seafloor Spreading Exists.
Answer: The mean is 3
Explanation: The mean is the average of the set of numbers. To find the mean of a set of numbers, you add them together and divide by the amount of numbers. When you add all the numbers, you get 30. Since there are 10 numbers, you do 30 divided by 10, which will give you 3.
Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Eventually, the crust cracks.
PyeongChang, South Korea. It would be one big opportunity for the country to host the First Winter Olympians of 2018. Although South Korea has been in some political problems, it has been looking forward to this event. It also made a change to its name and change the "y" to "C" because North Korea's Capital City is Pyeongyang.