Answer: Metal Detectors
Explanation: Metal detectors are inexpensive and easy to use equipment used to discover relics of the past. While it is useful in archaeology as a tool that discovers objects from the past quite easily, it is also a threat to archaeology. Some hobbyists and looters who come across archaeological finds which may be important to understanding past civilizations or a different era do not report these finds. Even worse, some looters knowingly infringe on archaeological sites and are aided by the metal detectors.
The rising of warmed air by creating a high-pressure system below, is not a part of a normal convection cycle.
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What is the significance of a convection cycle?</h3>
A continuous process of the rising of warmer areas of gases or liquids, and the sinking motion of the cooler ones is known as a convection cycle.
In a convection cycle, the warmed air cannot rise by creating a high pressure surface below and flowing away from the surface.
Hence, option D holds true regarding a convection cycle.
Learn more about a convection cycle here:
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Answer:
1, 2 and 3
Explanation:
The ones that apply to manganese nodules are:
- They contain iron, cobalt, and nickel.
- They commonly form around a nucleus.
Answer:
Geothermal energy
Explanation:
The Yellowstone National Park is a wonderful park located in the United State, covering an area of about 3,500 square miles. This park is comprised of beautiful geological as well as hydrothermal wonders.
The old geyser found in this park is powered by the geothermal energy. This energy can be simply defined as the energy that is stored in the interior of the earth. This energy increases with the increasing depth and is basically used in the production of electricity.
