What is the average temperature range in the tierra fría?
55°F to 65°F
What is the world's highest navigable lake located in the Altiplano?
Lake Titicaca
What is the tree line in the central Andes?
The highest elevation at which trees can grow (10,000 to 12,000 feet)
What type of vegetation is common in dry areas of the tierra fría?
Shrubs and grasses.
Name two indigenous groups that live in the central Andes.
Quechua and Aymara.
What type of farming technique is used to grow crops on steep hillsides?
Terracing.
How have people adapted their bodies to high elevations?
They have developed larger lungs to draw more oxygen from thin air.
What is vertical trade, and why is it important?
It is the trade of farm products between different elevation zones, providing people with a more balanced diet.
What is the temperature range in the tierra helada?
20°F to 55°F.
What crops are grown in the tierra helada?
Quinoa and certain types of potatoes.
Which animals are raised in the tierra helada, and what are they used for?
Llamas and alpacas for wool, clothing, and carrying heavy loads.
Why is mining dangerous in the tierra helada?
Miners face risks of lung disease and injuries due to harsh working conditions.
What is the snow line?
The elevation where permanent snow and ice begin.
Why are glaciers important for people living below the snow line?
They store water that melts and flows down to lower elevations during summer.
What dangers can melting glaciers cause?
Floods, landslides, or avalanches.
Is the region above the snow line inhabited? Why or why not?
No, because it is too cold and rocky for people to live there.
