Answer:
We would be considered as one of the top predators.
Explanation:
There aren't many threats to humans at this point. We're omnivores, so we consume plants and meat. Humans are usually tertiary consumers, on the third trophic level, but sometimes can be on the second trophic level depending on the diagram.
Answer: I believe it is 4
Explanation:
20% is in the great lakes
Answer:
Radiometric dating methods
Explanation:
Absolute dating is the process of determining an age on a chronological or specified time scale in which events occurred in archaeology and geology. Absolute dating can be determined by using properties of the atoms that make up materials.
The most common method of absolute dating uses by geologists is radiometric dating methods which is based on the natural radioactive decay of certain elements such as potassium and carbon found in the rocks. By comparing the ratio of parent isotope with a known half-life to daughter product in the rock, the age of the rock can be determined.
The carbon-14 isotope is used in radiocarbon dating, but is only useful for measuring recently formed rocks in the geologic past. The decay of Potassium-40 isotope known as potassium-argon (K-Ar) method allows dating of materials that up to 1,000 billion years old.
