No, a very small asteroid would not be capable of destroying all life on Earth. The scale of devastation caused by an asteroid depends on its size, composition, speed, and angle of impact. While even a small asteroid could potentially cause localized damage and loss of life, it would not have the global impact necessary to eradicate all life on Earth.
The destructive potential of an asteroid is typically measured using the Torino Scale or the Palermo Technical Impact Hazard Scale, which consider various factors to assess the potential danger. Larger asteroids, such as those with diameters of several kilometers or more, have the potential to cause catastrophic global effects, including widespread destruction and climate change.
However, it is important to note that efforts are in place to monitor and track asteroids that come close to Earth. Scientists and space agencies are constantly working to identify potentially hazardous asteroids and develop strategies to mitigate potential risks, such as deflection techniques or early warning systems.
While the risk of a small asteroid causing a global catastrophe is extremely low, continued efforts to monitor and study near-Earth objects are crucial to better understand and minimize any potential threats they may pose.