SCIENCE
BIOLOGICAL SCIENCES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
They were drowned in a great flood
|
|
|
They were killed when the Earth got too hot
|
|
|
They were killed when it got too cold and the plants they ate died
|
|
|
A meteor hit the earth and caused a temperature change they could not adjust to
|
Detailed explanation-1: -This impact made a huge explosion and a crater about 180 km (roughly 110 miles) across. Debris from the explosion was thrown into the atmosphere, severely altering the climate, and leading to the extinction of roughly 3/4 of species that existed at that time, including the dinosaurs.
Detailed explanation-2: -Sixty-six-million years ago, a nearly nine-mile-wide asteroid collided with Earth, sparking a mass extinction that wiped out most dinosaurs and three-quarters of the planet’s plant and animal species. Now we’re learning that the Chicxulub asteroid also generated a massive “megatsunami” with waves more than a mile high.
Detailed explanation-3: -After the dinosaurs’ extinction, flowering plants dominated Earth, continuing a process that had started in the Cretaceous, and continue to do so today. But all land animals weighing over 25 kilogrammes died out. ‘What we’re left with are basically the seeds of what we have today.
Detailed explanation-4: -Scientists already know that an asteroid-or perhaps a comet-struck Earth off Mexico’s Yucatán Peninsula. The resulting 110 miles/80 kilometers wide Chicxulub crater is thought to have caused a decades-long “impact winter” that killed the dinosaurs.
Detailed explanation-5: -If the asteroid hits on land, there would be a huge amount of dust thrown up into the atmosphere. If it hits in water, then there would be an increase in water vapor in the atmosphere. This would result in an increase in rain resulting in landslides and mudslides.