Question

1. 65 million years ago, these creatures went extinct due to the fall - out if a giant meteor smashing into the earth which had a devastating effect on their existence? dinosaurs
2. scientists estimate that the earth is about how many years old?

a) 4.5 million
b) 45 million
c) 450 million
d) 4.5 billion

1. scientists estimate that humans in our most primitive form, have been on earth how many years?

a) 30 thousand
b) 300 thousand
c) 3 million
d) 30 million

1. what was neanderthal man’s major weakness compared to cro - magnum man?
2. how long have humans (in our present form - cro - magnum), been in existence?

a) less than 50 thousand years
b) about 1 million years
c) no one really knows how long

Explanation:

1. Dinosaurs went extinct due to a meteor - impact 65 million years ago.
2. Scientific evidence, such as radiometric dating, shows the Earth is about 4.5 billion years old.
3. The earliest forms of humans (hominids) are estimated to be around 3 - 4 million years old, but the most primitive form of modern - like humans is closer to 300,000 years.
4. Cro - Magnon Man had more advanced cognitive and technological abilities compared to Neanderthal Man.
5. Cro - Magnon Man, the earliest form of modern humans, has been in existence for less than 50,000 years.

Answer:

1. Dinosaurs
2. d) 4.5 billion
3. b) 300 thousand
4. Less advanced cognitive and technological abilities
5. a) Less than 50 thousand years