Answer the following question given this paragraph: Calcium hydroxide and calcium carbonate are effective in neutralizing the effects of acid rain on lakes. Suggest other compounds that might be effective in treating lakes. Give a plausible reason to explain why Ca(OH)2 and CaCO3 are used. ♦️ Approximately 95% of the chlorine produced industrially comes from the electrolysis of sodium chloride solutions (brine): NaCl(aq) + H2O(l) Cl2(g) + H2(g) + NaOH(aq) Chlorine is a respiratory irritant whose presence is easily detected by its penetrating odor and greenishyellow color. One use for the chlorine produced is in the manufacture of hydrochloric acid. Q: Calcium hydroxide and calcium carbonate are effective in neutralizing the effects of what on lakes? Choices: - oil rain - ozone rain - dioxide rain - acid rain A:
acid rain
Answer the following question given this paragraph: 34.3 Digestive System Processes Digestion begins with ingestion, where the food is taken in the mouth. Digestion and absorption take place in a series of steps with special enzymes playing important roles in digesting carbohydrates, proteins, and lipids. Elimination describes removal of undigested food contents and waste products from the body. While most absorption occurs in the small intestines, the large intestine is responsible for the final removal of water that remains after the absorptive process of the small intestines. The cells that line the large intestine absorb some vitamins as well as any leftover salts and water. The large intestine (colon) is also where feces is formed. Q: Where are feces formed? Choices: - duodenum - liver - small intestine - large intestine A:
large intestine
Q: Answer the following question given this paragraph: Some invertebrates evolved a rigid rod along the length of their body. This rod is called a notochord. You can see the notochord in the tunicates in Figure below . The notochord gives the body support and shape. It also provides a place for muscles to attach. It can counterbalance the pull of the muscles when they contract. Animals with a notochord are called chordates. All of them are placed in Phylum Chordata. Some early chordates eventually evolved into vertebrates. Q: A notochord has in common with what vertbrate structure? Choices: - trichord - rib cage - rip chord - spinal cord A:
A: spinal cord
Question: Answer the following question given this paragraph: The most common cause of hearing loss is exposure to loud sounds. Loud sounds can damage hair cells inside the ears. Hair cells change sound waves to electrical signals that the brain can interpret as sounds. Louder sounds, which have greater intensity than softer sounds, can damage hair cells more quickly than softer sounds. You can see the relationship between sound intensity, exposure time, and hearing loss in the following Figure below . The intensity of sounds is measured in decibels (dB). Q: The scale that is used to measure the loudness of sound measures their loudness in what? Choices: - waves - weight - centimeters - decibels A:
Answer: decibels
*Question*
Answer the following question given this paragraph: The germ theory proposes that microorganisms are the cause of many diseases. Q: What theory proposes that microorganisms are the cause of many diseases? Choices: - malignant theory - evolution theory - mutated theory - germ theory A:
**Answer**
germ theory
Q: Answer the following question given this paragraph: for low temperatures, where the phase can change from a gas to a liquid. The term "vapor" refers to the gas phase when it exists at a temperature below the boiling temperature. Q: The term "vapor" refers to the gas phase when it exists at a temperature below what? Choices: - contaminated temperature - freezing temperature - liquid temperature - boiling temperature A:
A: boiling temperature