Q: What do scientists use to study the deep without going to the seafloor? Read this paragraph and choose the correct option from the provided answers: Sending humans to the seafloor is expensive and dangerous. Having to return humans safely to the surface limits what a mission can do. Remotely operated vehicles , or ROVs, allow scientists to study the deep without going to the seafloor. These small vehicles carry cameras and scientific instruments. ROVs were used to study inside the Titanic . This would have been far too dangerous for a manned sub to enter. Scientists control ROVs electronically with sophisticated operating systems. Choices: - drill rigs - telescopes - ultrasound machines - remotely operated vehicles A:
remotely operated vehicles

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Q: What happens to meteors as they fall through the mesosphere? Read this paragraph and choose the correct option from the provided answers: Did you ever see a meteor shower, like the one in Figure below ? Meteors burn as they fall through the mesosphere. The space rocks experience friction with the gas molecules. The friction makes the meteors get very hot. Many meteors burn up completely in the mesosphere. Choices: - they grow - they bounce - they stop suddenly - they burn A:
(Answer)
they burn

Ques: Q: In what organ is food remains turned into solid waste for excretion? Read this paragraph and choose the correct option from the provided answers: Recall that carbon dioxide travels through the blood and is transferred to the lungs where it is exhaled. In the large intestine, the remains of food are turned into solid waste for excretion. How is waste other than carbon dioxide removed from the blood? That is the role of the kidneys. Choices: - non-transverse intenstine - large tissue - large metabolism - large intestine A:
Ans: large intestine

(Q).
Q: Dissolved oxygen in seawater is critical for sea creatures, but as the oceans warm, oxygen becomes less what? Read this paragraph and choose the correct option from the provided answers: Introduction Coral reefs are home to about 25% of all marine species. They are being threatened by climate change, oceanic acidification, and water pollution, all of which change the composition of the solution we know as seawater. Dissolved oxygen in seawater is critical for sea creatures, but as the oceans warm, oxygen becomes less soluble. As the concentration of carbon dioxide in the atmosphere increases, the concentration of carbon dioxide in the oceans increases, contributing to oceanic acidification. Coral reefs are particularly sensitive to the acidification of the ocean, since the exoskeletons of the coral polyps are soluble in acidic solutions. Humans contribute to the changing of seawater composition by allowing agricultural runoff and other forms of pollution to affect our oceans. Solutions are crucial to the processes that sustain life and to many other processes involving chemical reactions. In this chapter, we will consider the nature of solutions, and examine factors that determine whether a solution will form and what properties it may have. In addition, we will discuss colloidssystems that resemble solutions but consist of dispersions of particles somewhat larger than ordinary molecules or ions. Choices: - insoluble - abundant - saturated - soluble A:
(A).
soluble

Ques:Q: Water molecules move about continuously due to what type of energy? Read this paragraph and choose the correct option from the provided answers: Water molecules move about continuously due to their kinetic energy. When a crystal of sodium chloride is placed into water, the water's molecules collide with the crystal lattice. Recall that the crystal lattice is composed of alternating positive and negative ions. Water is attracted to the sodium chloride crystal because water is polar and has both a positive and a negative end. The positively charged sodium ions in the crystal attract the oxygen end of the water molecules because they are partially negative. The negatively charged chloride ions in the crystal attract the hydrogen end of the water molecules because they are partially positive. The action of the polar water molecules takes the crystal lattice apart (see image below). Choices: - seismic - potential - optical - kinetic A:

Ans:kinetic

Question: Q: Fossils provide a window into the past. they are evidence for what? Read this paragraph and choose the correct option from the provided answers: Fossils provide a window into the past. They are evidence for evolution. Choices: - emergence - intelligent design - generation - evolution A:
Answer:
evolution