Ques:Q: Corals build hard exoskeletons that grow to become coral what? Read this paragraph and choose the correct option from the provided answers: Cnidarians are aquatic invertebrates in Phylum Cnidaria. They include jellyfish and corals, both of which have radial symmetry. All cnidarians have nematocysts, and many are bioluminescent. They may exist in medusa and/or polyp form. Corals build hard exoskeletons that grow to become coral reefs. Choices: - beds - layers - crystals - reefs A:

Ans:reefs
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Ques:Q: What instrument is used to record the length and strength of an earthquake? Read this paragraph and choose the correct option from the provided answers: Earthquakes may take place every day near a volcano. But before an eruption the number and size of earthquakes increases. This is the result of magma pushing upward into the magma chamber. This motion causes stresses on neighboring rock to build up. Eventually the ground shakes. A continuous string of earthquakes may indicate that a volcano is about to erupt. Scientists use seismographs to record the length and strength of each earthquake. Choices: - transmitter - epicenter - microscope - seismograph A:

Ans:seismograph
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Ques:Q: What part of an atom is positive due to the presence of positively charged protons? Read this paragraph and choose the correct option from the provided answers: Charge Carried by Electrons and Protons Franklin wrote in his letters and books that he could see the effects of electric charge but did not understand what caused the phenomenon. Today we have the advantage of knowing that normal matter is made of atoms, and that atoms contain positive and negative charges, usually in equal amounts. Figure 18.5 shows a simple model of an atom with negative electrons orbiting its positive nucleus. The nucleus is positive due to the presence of positively charged protons. Nearly all charge in nature is due to electrons and protons, which are two of the. Choices: - Neutron - Proton - Electron - nucleus A:

Ans:nucleus
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Ques:Q: After passing through capillaries and being filtered, clean blood leaves what organ through a vein? Read this paragraph and choose the correct option from the provided answers: Blood with wastes enters each kidney through an artery, which branches into many capillaries. After passing through capillaries and being filtered, the clean blood leaves the kidney through a vein. Choices: - pancreas - liver - heart - kidney A:

Ans:
kidney
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