SB4a Human Evolution

Question 1

species?

Answer 1

group of individuals that can reproduce with one another and produce fertile offspring

Question 2

evolution?

Answer 2

the gradual change in the characteristics of a species over time

Question 3

what are some problems with using fossils as evidence for evolution?

Answer 3

~there are gaps in the fossil record
~some fossils have not been discovered as they are in hard to access areas
~some have been destroyed over time

Question 4

Ardi - 3

Answer 4

~4.4 million years old
~about 1.2m tall and 50kg
~leg bones suggest she could walk upright but long arms suggest she could climb trees

Question 5

Lucy - 3

Answer 5

~3.2 million years old
~about 1.07m tall
~leg bones suggest she could walk upright but her toe bones are more curved for gripping

Question 6

handy man - 5

Answer 6

~discovered in 1960s by m
Mary and Louis Leakey
~2.4 - 1.4 million years old
~quite short with long arms
~walked upright
~used stone tools

Question 7

Homo erectus - 3

Answer 7

~1.6 million year old fossil was discovered in Kenya by Richard Leakey
~evidence humans evolved in Africa
~tall, 1.79m, and strongly built

Question 8

what were the earliest stone tools used for?

Answer 8

skinning animals and cutting meat

Question 9

what were later stone tools used for?

Answer 9

more sophisticated and used for hunting

Question 10

how was age worked out from stone tools?

Answer 10

by dating the layer of rock the stone was found in