Your answer to your question: Deltas have a rich accumulation of silt, so they are usually fertile agricultural areas.
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Measuring in light-years also allows astronomers to determine how far back in time they are viewing , Because light takes time to travel to our eyes. Everything we view during the dark in night has already been happened.
The scientific name for Earth's crust is the Lithosphere.
Answer: Lithosphere
Answer: The balloon floats due to the difference in density
Explanation:
The air inside the balloon is warm as a result of it being heated. As warm air spreads out more, it has a lower density than cooler air.
A substance with a lower density rises over substances with higher densities as those sink lower. With the air in the balloon having a lower density, it will rise above the air outside which is colder and has a higher density.
