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Astronomy_1_worksheet_4_part_4 - ur eFigur eual I tthe end...

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Figure 4 - Artist sketch of impact Figure 5 – the end of an era gure 6 – Actual Impact site in top corner That was nothing, however, compared to what happened next. The blast was so powerful that the crust of the Earth cracked and lava poured out underwater. Enormous amounts of melted rock, dust, steam and gases were thrown high into the air and spread by winds. These hot fragments fell back to Earth on forested areas and set them on fire. Within weeks, the skies over all of Earth darkened from ash, dust and smoke, and temperatures plunged as sunlight was blocked out. The rain became acidic from all the air pollution and the ozone layer that protects our planet from excessive UV radiation from the Sun was badly damaged, allowing harmful UV to reach the ground. Within a few months, plant and animal life began to die from the darkness, cold, acid rain, radiation and lack of food. The dinosaurs never recovered and they all died out. It was the end of an era.
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