Q: Fine-grained mud in the deep ocean comes from silts and clays brought from the land by? Read this paragraph and choose the correct option from the provided answers: Fine-grained mud in the deep ocean comes from silts and clays brought from the land by wind. The particles are deposited on the sea surface. they slowly settle to the deep ocean floor, forming brown, greenish, or reddish clays. Volcanic ash may also settle on the seafloor. Choices: - fire - water - waves - wind A:
wind
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Q: What is the minimum number of pulleys needed for a compound pulley? Read this paragraph and choose the correct option from the provided answers: Single pulleys may be fixed or moveable. Compound pulleys consist of two or more pulleys. Choices: - 1 - 4 - zero - 2 A:
2
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Q: What is the term for matter that does not let any light pass through it, whether it absorbs light, reflects light, or does both? Read this paragraph and choose the correct option from the provided answers: Opaque matter is matter that does not let any light pass through it. Matter may be opaque because it absorbs light, reflects light, or does both. Examples of opaque objects are solid wooden doors and glass mirrors. A wooden door absorbs most of the light that strikes it and reflects just a few wavelengths of visible light. A mirror, which is a sheet of glass with a shiny metal coating on the back, reflects all the light that strikes it. Choices: - devoid - obscene - artificial - opaque A:
opaque
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Q: Pheromones enable what, which is vital for organisms like ants that live in a large community? Read this paragraph and choose the correct option from the provided answers: Living in a large colony requires good communication. Ants communicate with chemicals called pheromones. For example, an ant deposits pheromones on the ground as it returns to the nest from a food source. It is marking the path so other ants can find the food. Honeybees communicate by doing a "waggle dance. ". Choices: - adaptation - asexual reproduction - migration - communication A:
communication
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