Erie has 100 000 people, and Pittsburgh has 300 000 - so from the first two Pittsburgh is the bigger one.
Philadelphia has 1.5 million people living in it - it is also the biggest city in Pennsylvania (this is the state where all the cities are) - and this is also the correct answer!
It is not the capital however, as it's Harrisburg.
Answer:
Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart.
Answer: 
Explanation:
We can divide this figure in a rectangle with base 
and height 
; and a right triangle with base 
and height 
.
Now, the total area 
of the figure will be the area of the rectangle 
plus the area of the triangle 
:
Where:
Then:
This is the area of the figure
Metamorphic rocks,such as marble will be formed
Answer:
The correct answer is - physical and human geography.
Explanation:
Environmental geography is the branch of geography that explains the spatial aspects of the interaction between the physical environment or natural world and humans. Ecological geography connects physical and human geography or ecosystem.
Environmental geography is a branch of geography that deals with the social relationships and economic interconnections, between people and their natural or physical environments.
