Answer:
Radioactive isotopes are unstable and will decay. ... The isotopes will decay into a stable isotope over time. Scientists can tell how old the rock was from looking at the radioactive isotope's half-life, which tells them how long it would take for there to be half the radioactive isotope and half the stable isotope.
Yes about 33000 people and to be more exact (about) 33561
C. deltas are a result of deposition. it looks like a triangle at the mouth of a river
The Russians had turned to a Market system.
Answer: Weathering is the breaking down of rocks and minerals on the surface of Earth. Weathering is divided into two types, mechanical and chemical.
Explanation: One of the causes for mechanical weathering is water, either liquid or solid. A cause for chemical weathering is rain water. Rain water reacts with mineral grains in rocks to form new minerals.
