Q: Answer the following question given this paragraph: Some springs have water that contains minerals. Groundwater dissolves minerals out of the rock as it seeps through the pores. The water in some springs is hot because it is heated by hot magma. Many hot springs are also mineral springs. That's because hot water can dissolve more minerals than cold water. Q: The water in some springs are hot because they're heated by what? Choices: - gravity - the sun - fires - hot magma A:
A: hot magma

Q: 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:
A: mylar

Q: Answer the following question given this paragraph: Salmon Larva. This newly hatched salmon larva doesn't look very fish-like. The structure hanging from the larva is the yolk sac. Q: What is the structure which hangs from a newly hatched salmon larva? Choices: - air sac - liquid sac - stomach sac - yolk sac A:
A: yolk sac

Q: Answer the following question given this paragraph: Curiosity, the rover, has found evidence of a flowing stream on Mars. Layers of smooth, water-polished pebbles have been photographed. This is exactly what you would see in a stream on Earth. There are many surface features that look like water-eroded canyons. Since there was liquid water on Mars, scientists think that life might have existed there in the past. One of Curiosity's tasks is to sample the soil to search for carbon and other evidence of life. Q: Evidence for the presence of what on mars makes scientists think that life might have existed there in the past? Choices: - gas - plasma - air - water A:
A: water