What does a weather balloon do? check all that apply.

1. warns about severe weather
2. enables forecasts seven to 10 days in advance
3. measures conditions in the upper atmosphere
4. collects data that predicts changes in the atmosphere
5. uses mathematical equations to show what will happen if conditions change

Humans have survived and thrived in mexico city by using technology to create greater access to land. when the spanish conquered the aztec capital, tenochtitlan, in the 16th century, they built mexico city by draining the lakes and filling in the lake water to create more arable land for agriculture. this technique of land reclamation has continued to be fundamental to human civilization in mexico city.