Answer the following question given this paragraph: Puberty is the stage of life when a child becomes sexually mature. Puberty begins when the pituitary gland tells the testes to secrete testosterone in boys, and in girls the pituitary gland signals the ovaries to secrete estrogen. Changes that occur during puberty are discussed in the Male Reproductive Development and Female Reproductive Development concepts. Q: What is the name of the stage of life when a child becomes sexually mature? Choices: - pre-adolescence - adulthood - reproductive stage - puberty A:
puberty
Answer the following question given this paragraph: Figure 11.26 Applying a pressure greater than the osmotic pressure of a solution will reverse osmosis. Solvent molecules from the solution are pushed into the pure solvent. Q: Applying a pressure greater than the osmotic pressure of a solution will do what? Choices: - ultrafiltration - osmosis - normal osmosis - reverse osmosis A:
reverse osmosis
Q: Answer the following question given this paragraph: A mudflow is the sudden flow of mud down a slope because of gravity. Mudflows occur where the soil is mostly clay. Like landslides, mudflows usually occur when the soil is wet. Wet clay forms very slippery mud that slides easily. Mudflows follow river channels, washing out bridges, trees, and homes that are in their path. Q: What's it called when there's a sudden flow of mud? Choices: - avalanche - sediment - dirt bath - mudflow A:
A: mudflow
Question: Answer the following question given this paragraph: Q: What is the process by which plants and animals increase in size? Choices: - reproduction - grafting - splicing - growth A:
Answer: growth
*Question*
Answer the following question given this paragraph: the fact that stars are made up of very lightweight hydrogen gas. Q: What type of gas are stars made up of? Choices: - water vapor - freon - calcium - hydrogen A:
**Answer**
hydrogen
(Question)
Answer the following question given this paragraph: A compound is a unique substance that forms when two or more elements combine chemically. Compounds form as a result of chemical reactions. The elements in compounds are held together by chemical bonds. A chemical bond is a force of attraction between atoms or ions that share or transfer valence electrons. For a video introduction to compounds, go to this URL: http://www. youtube. com/watch?v=-HjMoTthEZ0 . Q: What type of reactions form compounds? Choices: - mineral reactions - consumption reactions - physical reactions - chemical reactions A:
(Answer)
chemical reactions