Q: Q: The temperature at which something melts is refered to as what? Read this paragraph and choose the correct option from the provided answers: Both of these people are participating in a board sport, but the man on the left is snowboarding in Norway while the woman on the right is sandboarding in Dubai. Snow and sand are both kinds of matter, but they have different properties. What are some ways snow and sand differ? One difference is the temperature at which they melt. Snow melts at 0C, whereas sand melts at about 1600C! The temperature at which something melts is its melting point. Melting point is just one of many physical properties of matter. Choices: - precipitation point - evaporation point - boiling point - melting point A:
A: melting point

Q: Q: What involves the reaction of a hydrocarbon with oxygen gas to produce water and carbon dioxide? Read this paragraph and choose the correct option from the provided answers: Combustion reactions involve the reaction of a hydrocarbon with oxygen gas to produce water and carbon dioxide. Choices: - hydrogen reactions - chemical reactions - material reactions - combustion reactions A:
A: combustion reactions

Q: Q: The cytoskeleton is a cellular "scaffolding" or "skeleton" that crisscrosses what? Read this paragraph and choose the correct option from the provided answers: The cytoskeleton is a cellular "scaffolding" or "skeleton" that crisscrosses the cytoplasm. All eukaryotic cells have a cytoskeleton, and recent research has shown that prokaryotic cells also have a cytoskeleton. The eukaryotic cytoskeleton is made up of a network of long, thin protein fibers and has many functions. It helps to maintain cell shape, holds organelles in place, and for some cells, it enables cell movement. The cytoskeleton plays important roles in both the intracellular movement of substances and in cell division. Certain proteins act like a path that vesicles and organelles move along within the cell. The threadlike proteins that make up the cytoskeleton continually rebuild to adapt to the cell's constantly changing needs. Three main kinds of cytoskeleton fibers are microtubules, intermediate filaments, and microfilaments. Choices: - golgi apparatus - cerebellum - cell membrane - cytoplasm A:
A: cytoplasm

Q: Q: Iron is oxidized to fe2+(aq) at an anodic site on the surface of the iron, which is often an impurity or this? Read this paragraph and choose the correct option from the provided answers: Iron is oxidized to Fe2+(aq) at an anodic site on the surface of the iron, which is often an impurity or a lattice defect. Oxygen is reduced to water at a different site on the surface of the iron, which acts as the cathode. Electrons are transferred from the anode to the cathode through the electrically conductive metal. Water is a solvent for the Fe2+ that is produced initially and acts as a salt bridge. Rust (Fe2O3xH2O) is formed by the subsequent oxidation of Fe2+ by atmospheric oxygen. In the corrosion process, iron metal acts as the anode in a galvanic cell and is oxidized to Fe2+; oxygen is reduced to water at the cathode. The relevant reactions are as follows:. Choices: - displacement defect - spontaneous mutation - ladder complex - lattice defect A:
A: lattice defect