Answer:
The correct answer is option A. "a fossilized fish found in a layer of rock estimated to be between 15,000 and 25,000 years old".
Explanation:
It is estimated that the oldest fossils that can be reliably measured using carbon-14 must be organic and have an age of around 50,000 years. Therefore, a fossilized fish found in a layer of rock estimated to be between 15,000 and 25,000 years old will fit perfectly to be dated using carbon-14. Anything older than 50,000 years old must be dated using other radiometric dating approaches.
The oxygen can enter the water through diffusion or photosynthesis.In the process of diffusion oxygen slowly diffuse across the water's surface from the air.In the process of photosynthesis, oxygen is a produced as a waste product from aquatic plants.
Answer:
A system with no inputs is called a closed system. One with inputs is an open system. Since human being needs energy, water, minerals, etc. (as inputs), human body is an open system.
Explanation:
Your answer will be A. Crust, as it’s depth is up to 3,000 kilometers
