Answer the following question given this paragraph: Silicates are the largest mineral group. About 1,000 silicate minerals are known. Silicate minerals are also extremely common. They make up over 90% of Earth's crust!. Q: What is the largest mineral group, comprising over 90% of earth's crust? Choices: - oxides - carbonates - soils - silicates A:
silicates
Answer the following question given this paragraph: Snow falls when water vapor condenses as ice crystals. The air temperature is below freezing all the way to the ground, so the ice crystals remain frozen. They fall as flakes. Sleet forms when snow melts as it falls through a layer of warm air and then refreezes. It turns into small, clear ice pellets as it passes through a cold layer near the ground. Freezing rain falls as liquid water. It freezes on contact with cold surfaces near the ground. It may cover everything with a glaze of ice. If the ice is thick, its weight may break tree branches and pull down power lines. Hail is another type of frozen precipitation. Hail forms in thunderstorms when strong updrafts carry rain high into the troposphere. The rain freezes into balls of ice called hailstones. This may happen over and over again until the hailstones are as big as baseballs. Hail forms only in cumulonimbus clouds. Q: What are two types of frozen percipitation? Choices: - icycles and icebergs - rain and hail - ice and frost - snow and hail A:
snow and hail
Q: Answer the following question given this paragraph: The atmosphere is a crucial part of the water cycle. It is an important reservoir for water, and the source of precipitation. Q: What is the source of precipitation? Choices: - pollution - clouds - the sea - the atmosphere A:
A: the atmosphere
Question: Answer the following question given this paragraph: Moving particles transfer thermal energy through a fluid by forming convection currents. Q: Through what do moving particles transfer thermal energy? Choices: - plasma - gas - tissue - fluid A:
Answer: fluid
*Question*
Answer the following question given this paragraph: Muscles cannot contract on their own. They need a stimulus from a nerve cell to "tell" them to contract. Let's say you decide to raise your hand in class. Your brain sends electrical messages to nerve cells, called motor neurons, in your arm and shoulder. The motor neurons, in turn, stimulate muscle fibers in your arm and shoulder to contract, causing your arm to rise. Involuntary contractions of cardiac and smooth muscles are also controlled by nerves. Q: What do muscles need to contract? Choices: - stress - tendons - pressures - stimulus A:
**Answer**
stimulus
Answer the following question given this paragraph: Sensory neurons carry nerve impulses from tissues and organs to the spinal cord and brain. Q: What can carry nerve impulses from tissues and organs to the spinal cord and brain? Choices: - healthy neurons - motor neurons - respiratory neurons - sensory neurons A:
sensory neurons