By poking, prodding, analyzing rock, testing hypothesis. The scientific method.
Type your answer here... D.Comparing the composition of the crust to other bodies in the solar system
it has been washed into the oceans as the continental crust has eroded.
While soil composition is an important tool for understanding the earth's history, it alone cannot determine the age of the earth. Scientists use a variety of methods such as radiometric dating of rocks, fossils, and ice cores to determine the age of the earth. These methods provide more accurate and reliable information about the age of our planet.
Scientists study seismic waves to learn about the temperature inside the Earth's crust. By analyzing the speed and direction of these waves as they travel through different layers of the Earth, scientists can infer information about the temperature and composition of the Earth's crust.
Scientists determined information about Earth's crust using various methods, including seismic imaging, drilling core samples, and satellite remote sensing. These techniques help scientists analyze the composition, structure, and thickness of the Earth's crust, providing valuable insight into the planet's geology and tectonic processes.
The Earths crust is approximately 650 km deep.
The sudden vibration in the plates inside the crust causes the earths crust to rise & fall.
mantle
The mantle is composed of basaltic rock, the crust is composed mostly of granitic rock. Basalt is denser than Granite.
The earth's crust is not stress
half of earths layer
continental crust