The main reason why the tectonic plates move is the conversational currents. There is magma between the upper mantle and the asthenosphere that heats up at the upper mantle. The weight is so small that the magma rises with the help of these conversational currents. When the magma has ascended towards the asthenosphere, it has nowhere to go so the magma lies along the asthenosphere. There the magma cools down again because the asthenosphere is colder than the upper mantle, which makes the magma heavier and goes back down to the upper mantle, where the magma heats up again and everything starts all over again and so it goes on over and over again. Scientists have concluded that the earth's gravity causes two other processes that also cause the tectonic plates to move.
Ridge push - in the spreading zones, the sides of the tiles are raised and slide to the side as in a slide.
Slab pull - when a plate is pulled down by gravity in a subduction zone like an anchor.
Answer:
Hi,
Geologists obtain indirect evidence about the earth’s interior by studying seismic waves produced.
Explanation:
Geologists are able to study the layers of the interior of the earth by observing the seismic waves patterns. The recorded data for the waves can show how the waves traveled through the earth and the path followed which will reveal the structure of the interior of the earth. The speed and magnitude of the wave can further reveal the characteristics of the earth’s interior.
Best wishes!
Answer:
1. Identify the problem as you see it.
2. Get the story straight - gather relevant data. ...
3. Ask yourself if the problem is a regulatory issue or a process issue related to regulatory requirements.
4. Compare the issue to a specific rule in ASHA's Code of Ethics. ...
5. Identify who has the power and control in the situation.
Explanation:
There are six broad ethical areas that need to be considered in your research. In this chapter, we will discuss voluntary participation, informed consent, confidentiality and anonymity, the potential for harm, communi- cating the results, and more specific ethical issues.
Answer: He found a rock, and the crystals inside are minerals.
Options:
- He found a rock, and the crystals inside are minerals.
-
He found a mineral, and the crystals inside are rocks.
- He found a rock, and the crystals inside are rocks, too.
-
He found a mineral, and the crystals inside are made of dirt.
Explanation:
A rock differs from a mineral. While they are both solid, a mineral has a crystalline structure while a rock does not have a specific structure. Rocks are made up of different mineral structures and that is what Joseph discovered on dropping the rock, one of the component minerals in the rock. For example, a type of rock, slate may consist of feldspar, quartz among many other minerals.
Answer:
Two effects of the Silk Road are the sharing of technological advancements and the spread of the plague.
Explanation:
The Silk Road was a network of trading routes that connected East Asia, Southeast Asia, South Asia, Central Asia, the Middle East, Europe, and northwestern Africa. This trading network has been functional for several thousand years and it has had a lot of positive effects on humanity, but also the occasional negative one.
One big positive effect has been the sharing of technological advancements between the different civilizations, which has led to improvements in the living conditions, exploration, and further advancements all over the areas that are connected with this network. One big negative effect has been the plague. Through the extensive trade of goods, the plague managed to find its way from East Asia all the way to Europe, and it had such a negative effect on the population that it contributed to big geopolitical changes, and it was the last time when the human population dropped.
