Answer the following question given this paragraph: Q: What are the two main parts of the human nervous system? Choices: - lungs, brain - lungs, spinal cord - brain, heart - brain, spinal cord A:
brain, spinal cord
(Question)
Answer the following question given this paragraph: At the end of the Precambrian, a mass extinction occurred. In a mass extinction , the majority of species die out. The Precambrian mass extinction was the first of six mass extinctions that occurred on Earth. It's not certain what caused this first mass extinction. Changes in Earth's geology and climate were no doubt involved. Q: What was the first mass extinction that occurred on earth? Choices: - late Devonian mass extinction - paleozoic mass extinction - proterozoic mass extinction - precambrian mass extinction A:
(Answer)
precambrian mass extinction
Ques: Answer the following question given this paragraph: Pure nonpolar covalent bonds exist only between two identical atoms. The H-H bond would be 100% covalent, because there is no difference in electronegativity between the two atoms. Q: Pure nonpolar covalent bonds exist only between what? Choices: - two altered atoms - two producing atoms - three altered atoms - two identical atoms A:
Ans: two identical atoms
(Q).
Answer the following question given this paragraph: Loudness refers to how loud or soft a sound seems to a listener. The loudness of sound is determined, in turn, by the intensity, or amount of energy, in sound waves. The unit of intensity is the decibel (dB). Q: What is the term used to measure the intensity of sound waves? Choices: - amplitude - phon - hertz - decibel A:
(A).
decibel
Ques:Answer the following question given this paragraph: If someone asks you, "What is science?" you might say that it's a bunch of facts and explanations. But that's only part of the story. Science is a knowledge base. But science is also a way of learning about the world. Earth science is about our planet and its environments. Earth scientists study Earth's surface and interior. They study why volcanoes erupt and why some places are mountainous and some are entirely flat. Some Earth scientists are interested in the weather. Others want to know about the oceans. There are even Earth scientists who apply what they know about Earth to learning about space. Some Earth scientists do a lot of their work in the field, as seen above. Q: What branch of science aims to understand all about our planet and its environments? Choices: - biology - immunology - petrology - earth science A:

Ans:earth science
Ques: Answer the following question given this paragraph: Gastric Secretion The secretion of gastric juice is controlled by both nerves and hormones. Stimuli in the brain, stomach, and small intestine activate or inhibit gastric juice production. This is why the three phases of gastric secretion are called the cephalic, gastric, and intestinal phases (Figure 23.17). However, once gastric secretion begins, all three phases can occur simultaneously. Q: Stimuli in the brain, stomach, and small intestine activate or inhibit production of what secretion? Choices: - metabolic juice - sweat - digestive juice - gastric juice A:
Ans:
gastric juice