Tektites are small, glassy objects found in specific areas on Earth called strewn fields. Three scientists present hypotheses regarding the origin and formation of tektites.
Scientist 1
Tektites are terrestrial in origin, formed when large meteorites collided with Earth. The extreme kinetic energy of the impact melted local surface sediments (mostly quartz-rich sands). This molten silicate material was ejected high into the atmosphere, where it cooled rapidly in flight to form glass before falling back to Earth.
Scientist 2
Tektites originated on the Moon. Lunar volcanic eruptions propelled molten silicate magma at escape velocity into space. This material traveled through space and entered Earth's atmosphere. As the molten droplets fell through Earth's atmosphere, they underwent secondary melting due to atmospheric friction, followed by rapid cooling upon reaching the cooler lower atmosphere.
Scientist 3
Tektites are remnants of silicate-rich asteroids. When these asteroids entered Earth's atmosphere at high speeds, frictional heating caused the outer layers of the asteroid to melt. This molten silicate material sheared off into droplets, which cooled rapidly during flight through the atmosphere and fell to the ground as tektites.
Based on the descriptions of the three hypotheses, all three scientists would agree with which of the following statements regarding the formation of tektites?
- ATektites were created from terrestrial material melted by meteorite impacts on Earth.
- BTektites formed from material that traveled through space before entering Earth's atmosphere.
- Tektites formed from molten silicate material that cooled rapidly.Cevap
- DTektites were produced by explosive volcanic activity.