*Question*
Answer the following question given this paragraph: times faster than air. For this reason, high-quality helium-filled balloons are usually made of Mylar, a dense, strong, opaque material with a high molecular mass that forms films that have many fewer pores than rubber. Mylar balloons can retain their helium for days. 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*
Answer the following question given this paragraph: Living things must have chemical energy from food to power life processes. Most of the chemical energy in food comes ultimately from the energy in sunlight. Q: Most of food's chemical energy ultimately comes from what source? Choices: - plants - air - minerals - sunlight A:
**Answer**
sunlight

*Question*
Answer the following question given this paragraph: The fruiting bodies are usually produced at the surface of the food source, rather than hidden within it. This allows the reproductive spores to be easily shed and carried away by the wind, water, or animals. The fruiting bodies are usually the only indication that a fungus is present. Like icebergs, the fruiting bodies represent only a tiny fraction of the whole fungus, with most of the fungus hidden from view. 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*
Answer the following question given this paragraph: Sedimentary rocks that are not horizontal have been deformed. Q: What is a defining feature of deformed sedimentary rocks? Choices: - not solid - only horizontal - not magnetic - not horizontal A:
**Answer**
not horizontal