*Question*
Q: What material used for helium-filled balloons is dense, strong and opaque, with a high molecular mass that forms films that have many fewer pores than rubber? Choices: - fiberglass - cellophane - foil - mylar A:
**Answer**
mylar

*Question*
Q: Most of food's chemical energy ultimately comes from what source? Choices: - plants - air - minerals - sunlight A:
**Answer**
sunlight

*Question*
Q: Where is the fruiting body normally produced in relation to the food source? Choices: - at the root - in the soil - underneath the surface - at the surface A:
**Answer**
at the surface

*Question*
Q: What is a defining feature of deformed sedimentary rocks? Choices: - not solid - only horizontal - not magnetic - not horizontal A:
**Answer**
not horizontal