*Question*
Q: Why are continents unable to be pushed down into the mantle by plate boundaries? Read this paragraph and choose the correct option from the provided answers: Most of the world's largest mountains form as plates collide at convergent plate boundaries. Continents are too buoyant to get pushed down into the mantle. So when the plates smash together, the crust crumples upwards. This creates mountains. Folding and faulting in these collision zones makes the crust thicker. Choices: - gravity - surface tension - density - buoyancy A:
**Answer**
buoyancy

*Question*
Q: What is the closed circulatory system of humans and other vertebrates called? Read this paragraph and choose the correct option from the provided answers: Choices: - digestive system - reproductive system - respiratory system - cardiovascular system A:
**Answer**
cardiovascular system

*Question*
Q: What is the point on the ground that is located directly above where underground rocks fracture (or the "focus" point)? Read this paragraph and choose the correct option from the provided answers: The focus is where the rocks rupture. The epicenter is the point on the ground directly above the focus. Choices: - danger zone - fault line - seismic point - epicenter A:
**Answer**
epicenter

*Question*
Q: On what part of bones would you expect to find cartilage? Read this paragraph and choose the correct option from the provided answers: The adult human skeleton has 206 bones, some of which are named below ( Figure below ). Bones are made up of living tissue. They contain many different types of tissues. Cartilage, a dense connective tissue, is found at the end of bones and is made of tough protein fibers. Cartilage creates smooth surfaces for the movement of bones that are next to each other, like the bones of the knee. Choices: - interior - marrow - exterior - end A:
**Answer**
end