Q: What kind of bond doesn't form molecules, but instead forms crystals? Read this paragraph and choose the correct option from the provided answers: Ionic compounds contain ions of metals and nonmetals held together by ionic bonds. Ionic compounds do not form molecules. Instead, many positive and negative ions bond together to form a structure called a crystal. You can see an example of a crystal in Figure below . It shows the ionic compound sodium chloride. Positive sodium ions (Na + ) alternate with negative chloride ions (Cl - ). The oppositely charged ions are strongly attracted to each other. Choices: - electron bonds - magnetic bonds - covalent bonds - ionic bonds A:
ionic bonds

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Q: What are found primarily in lines around the edges of some continents? Read this paragraph and choose the correct option from the provided answers: When earthquake epicenters are put on a map, they outline the plates . This is because the earthquakes where the plates come into contact with each other. Earthquakes are found primarily in lines around the edges of some continents. They are also found through the centers of some oceans. Some occur in patches in some land areas. Choices: - volcanoes - glaciers - Reefs - earthquakes A:
(Answer)
earthquakes

Ques: Q: What theory brings together continental drift and seafloor spreading? Read this paragraph and choose the correct option from the provided answers: The theory of plate tectonics brings together continental drift and seafloor spreading. Choices: - theory of order tectonics - theory of water tectonics - theory of front tectonics - theory of plate tectonics A:
Ans: theory of plate tectonics

(Q).
Q: Our sun is on the main sequence, like most stars, and it is classified by what colorful name? Read this paragraph and choose the correct option from the provided answers: We have a main sequence star nearby. Our Sun is on the main sequence, classified as a yellow dwarf. Our Sun has been a main sequence star for about 5 billion years. As a medium-sized star, it will continue to shine for about 5 billion more years. Most stars are on the main sequence. Choices: - white dwarf - blue dwarf - red dwarf - yellow dwarf A:
(A).
yellow dwarf

Ques:Q: What kind of ph would you find in water from bogs? Read this paragraph and choose the correct option from the provided answers: 44.4 Aquatic Biomes Aquatic ecosystems include both saltwater and freshwater biomes. The abiotic factors important for the structuring of aquatic ecosystems can be different than those seen in terrestrial systems. Sunlight is a driving force behind the structure of forests and also is an important factor in bodies of water, especially those that are very deep, because of the role of photosynthesis in sustaining certain organisms. Density and temperature shape the structure of aquatic systems. Oceans may be thought of as consisting of different zones based on water depth and distance from the shoreline and light penetrance. Different kinds of organisms are adapted to the conditions found in each zone. Coral reefs are unique marine ecosystems that are home to a wide variety of species. Estuaries are found where rivers meet the ocean; their shallow waters provide nourishment and shelter for young crustaceans, mollusks, fishes, and many other species. Freshwater biomes include lakes, ponds, rivers, streams, and wetlands. Bogs are an interesting type of wetland characterized by standing water, lower pH, and a lack of nitrogen. Choices: - normal ph - higher ph - regular ph - lower ph A:

Ans:lower ph

Ques: Q: Acid rain is corrosive rain caused by rainwater falling to the ground through which gas? Read this paragraph and choose the correct option from the provided answers: Sulfur enters the ocean in runoff from land, from atmospheric fallout, and from underwater geothermal vents. Some ecosystems rely on chemoautotrophs using sulfur as a biological energy source. This sulfur then supports marine ecosystems in the form of sulfates. Human activities have played a major role in altering the balance of the global sulfur cycle. The burning of large quantities of fossil fuels, especially from coal, releases larger amounts of hydrogen sulfide gas into the atmosphere. As rain falls through this gas, it creates the phenomenon known as acid rain, which damages the natural environment by lowering the pH of lakes, thus killing many of the resident plants and animals. Acid rain is corrosive rain caused by rainwater falling to the ground through sulfur dioxide gas, turning it into weak sulfuric acid, which causes damage to aquatic ecosystems. Acid rain also affects the man-made environment through the chemical degradation of buildings. For example, many marble monuments, such as the Lincoln Memorial in Washington, DC, have suffered significant damage from acid rain over the years. These examples show the wide-ranging effects of human activities on our environment and the challenges that remain for our future. Choices: - sulfide dioxide - carbon dioxide - essential dioxide - sulfur dioxide A:
Ans:
sulfur dioxide