China has a population of ? a. about 100 million b. about 500 million c. more than 1 billion d. more than 1 trillion

Identifica pe harta vulcanii catopaxi si llullaillaco analizeaza semnele conventionale si indica tipul acestor vulcani

Me plzzz what is the ratio of water than falls on land as compared to the amount that falls onto the oceans? what role do clouds play in regulating earth’s energy balance? me plzzz

What first caused people to consider that the continents were once one large landmass?