Answer the following question given this paragraph: Surface mining exposes minerals that were underground to air and water at the surface. These minerals contain the chemical element sulfur. Sulfur mixes with air and water to make sulfuric acid. This acid is a highly corrosive chemical. Sulfuric acid gets into nearby streams and can kill fish, plants, and animals. Surface mining is safer for the miners. Q: What is corrosive mixture is formulated by the combination of water, air and sulfur? Choices: - nitric acid - sulfuric water - hydrochloric acid - sulfuric acid A:
sulfuric acid
Answer the following question given this paragraph: A day or two after an ovary releases an egg, the egg may unite with a sperm. Sperm are deposited in the vagina during sexual intercourse. They propel themselves through secretions in the uterus and enter a fallopian tube. This is where fertilization normally takes place. Q: Sperm propel themselves through secretions in the uterus and enter what tube? Choices: - gaseous - ovarian - uterine - fallopian A:
fallopian
Q: Answer the following question given this paragraph: The main distinguishing feature of vertebrates is their vertebral column, or backbone (see Figure below ). The backbone runs from the head to the tail along the dorsal (top) side of the body. The vertebral column is the core of the endoskeleton. It allows a vertebrate to hold its shape. It also houses and protects the spinal (nerve) cord that passes through it. The vertebral column is made up of repeating units called vertebrae (singular, vertebra). In many species, there are shock-absorbing discs between the vertebrae to cushion them during movement. Q: What makes up the core of the endoskeleton? Choices: - dermis - notochord - thorax - vertebral column A:
A: vertebral column
Question: Answer the following question given this paragraph: Soil erosion is a natural occurrence. However, human activities have greatly accelerated soil erosion. In some locations, soil may now be eroding about 10 times faster than its natural rate. Since Europeans settled in the United States, approximately one-third of the topsoil has eroded away. Q: Since europeans settled in the united states, about what percentage of topsoil has eroded away? Choices: - 42 percent - 10 percent - 25 percent - 33 percent A:
Answer: 33 percent
*Question*
Answer the following question given this paragraph: A chloroplast consists of thylakoid membranes surrounded by stroma. The thylakoid membranes contain molecules of the green pigment chlorophyll. Q: What consists of thylakoid membranes surrounded by stroma? Choices: - a photon - a nucleus - a stem - a chloroplast A:
**Answer**
a chloroplast
*Question*
Answer the following question given this paragraph: Q: What are typically named for their major physical or climatic factors in addition to their predominant vegetation? Choices: - communities - aqueous biomes - habitats - terrestrial biomes A:
**Answer**
terrestrial biomes