Suspend the bar magnet freely using a string. The magnet will align itself with the Earth’s magnetic field. The end pointing towards the Earth’s geographic north is the magnet’s north pole, as opposites attract.
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To find the poles, bring the marked magnet close to the unmarked one. The north pole of the marked magnet will attract the south pole and repel the north pole of the unmarked magnet, revealing its poles.
Reshma can identify the magnets by bringing each bar close to the other two. If a bar repels one and attracts the other, it is a magnet. The iron bar will only be attracted.
The elevation of land is measured from sea level, considered zero. Methods include using altimeters, which gauge air pressure changes, GPS devices that calculate elevation from satellite data, and traditional surveying techniques, which involve measuring angles and distances from a ...
The biosphere encompasses all living organisms on Earth and their interactions with the atmosphere, lithosphere, and hydrosphere. It includes diverse ecosystems, from forests and oceans to deserts and tundras, supporting life through complex biological processes and cycles that sustain and ...
The hydrosphere encompasses all water on Earth, including oceans, rivers, lakes, glaciers, and groundwater. It plays a crucial role in regulating climate, supporting ecosystems, and sustaining life. The hydrosphere is interconnected with the atmosphere, lithosphere, and biosphere, influencing weather patterns ...
The atmosphere is the layer of gases surrounding the Earth, essential for life. It comprises nitrogen, oxygen, and trace gases, regulating temperature, weather, and climate. It protects living organisms from harmful solar radiation and enables respiration, making it crucial for ...
The lithosphere is the outermost layer of the Earth, consisting of the crust and the uppermost mantle. It is rigid and broken into tectonic plates that float on the semi-fluid asthenosphere below. These plates move and interact, causing geological activity ...
Continents are the large, continuous landmasses on Earth. They include Asia, Africa, North America, South America, Antarctica, Europe, and Australia. Each continent is a distinct geographic entity separated by oceans and seas. They vary in size, climate, and human activity, ...
The Atlantic Ocean lies between North and South America to the west and Europe and Africa to the east. It extends from the Arctic Ocean in the north to the Antarctic Ocean in the south. The Atlantic is the second-largest ...