Answer:
An open circuit is one where the continuity has been broken by an interruption in the path for current to flow. A closed circuit is one that is complete, with good continuity throughout.
Explanation:
For instance, a simple light switch opens and closes the circuit that connects a light to a power source. When you build a circuit, it's a good idea to disconnect the battery or other power source when the circuit is not in use.
18,000 years ago was the last glacial maximum in North America.
The Last Glacial Maximum (LGM) occurred during the final phase of the Pleistocene, about 18,000 years ago. At that time, the world's sea level was more than 400 feet lower than it is today, and glaciers covered about 8% of the earth's surface. 25% of the Earth's land area.
The end of the Glacial Maximum, about 18,000 years ago, is often called the end of the ice age, even though Antarctica and Greenland have vast expanses of ice year-round.
Learn more about glacial maximum here: brainly.com/question/2704768
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Answer:
It's because you are breathing in dust particles, and sand particles that will make it harder to breath.
Explanation:
"Sandstorms contain sand and dust particles and when you're in one you will be breathing in those sand and dust particles" which is putting the particles in your nostrils and lungs which will make it harder to breath. The consequences of breathing in these particles will strengthen if you already have problems with breathing.
Hope this helps.
