Answer:
D) the steady, clocklike decay of certain radioactive isotopes over time.
Explanation:
Geologists use radiometric dating to estimate how long ago rocks formed, and to infer the ages of fossils contained within those rocks.
For example, when rocks are formed, such as igneous rocks (formed when molten rocks cools), certain radioactive atoms are trapped inside the rocks during this formation process. Then these radioactive atoms decay over time.
The age of the rock can be estimated by comparing the occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay.
From the options;
A) this is about the formation of the radioactive molecules and not about radiometric dating
B) this is radiocarbon dating (cabon dating/carbon-14 dating)
C) the <em>assumption </em>is wrong since the radioactive isotopes decays not accumulate.
D) the corect option as I explained earlier.
Answer:
New crust, sometimes islands/mountains
Explanation:
Divergent boundaries are when two tectonic places are moving away from each other. In the current configuration of Earth, that happens in the ocean.
When plates move away from each other, they leave a gap. That gap is filled with lava that solidifies quickly and forms now crust. If the ocean floor is relatively shallow, and the lava pressure is big enough, that can lead to the formation of new islands, mountains/volcanoes on top of the gap. That's basically how the Galapagos islands were created.
Answer:
<u>Relative dating</u>
Explanation:
Usually the age of formations of a rock is categorized in a geologic time scale.
There are two different types of geologic time scale;
a. Relative dating sequence
b. Absolute dating sequence
The correct sequence from bottom to top is the relative time dating. The Relative dating shows rock ages in their order of occurrence (from Bottom to Top).
These are examples of relative dating sequence:
- Superposition,
- Crosscutting Relationships,
- Sequence from bottom to top,
- Inclusions,
- Faunal Succession.
Debes tener un territorio definido. Debes tener una población permanente. Debes tener un gobierno. Su gobierno debe ser capaz de interactuar con otros estados. Esos son solo algunos de los requisitos
Answer:
wear a lab apron and safety goggles
