what are ice ages?

Question

A)periods of time glaciers receded to cover only the poles.
B)eras during which earths orbit kept the planet far from the sun.
C)periods of time when glaciers covered much of the earth.
D)times when human and animal life thrived in high latitudes.
.I chose letter (C).
When the death rate is higher than birthrate,_________ exists.
A)zero population growth
B)doubling time
C)population density
D)negative population growth
.I chose letter (B).
Every culture creates a social system by:
A)treating each person equally
B)Treating its members as if they had to earn privileges
C)organizing its members into smaller groups
D)organizing its members into one large group
.I chose letter (C).

Answer 1

first, and third correct.

Answer 2

a)zero population growth for the second question

Answer 3

With regard to population growth, think in terms of money.
If you earn 1000 per month and you spend 1100 per month, are you making money or losing money. If the death rate (losing people) exceeds the birth rate (making people) will the population get larger of smaller.