Q: Cirrus, stratus, and cumulus are types of what? Read this paragraph and choose the correct option from the provided answers: Cloud types include cirrus, stratus, and cumulus. Choices: - plants - storms - slopes - clouds A:
clouds

Q: To undo the tarnish on copper pennies, you can place them in what liquid? Read this paragraph and choose the correct option from the provided answers: Because chemical changes produce new substances, they often cannot be undone. For example, you can't change a fried egg back to a raw egg. Some chemical changes can be reversed, but only by other chemical changes. For example, to undo the tarnish on copper pennies, you can place them in vinegar. The acid in the vinegar reacts with the tarnish. This is a chemical change that makes the pennies bright and shiny again. You can try this yourself at home to see how well it works. Choices: - distilled water - honey - seawater - vinegar A:
vinegar

Q: What is the force that pulls downward on an object and is measured by weight? Read this paragraph and choose the correct option from the provided answers: Weight measures the force of gravity pulling downward on an object. The SI unit for weight, like other forces, is the Newton (N). On Earth, a mass of 1 kilogram has a weight of about 10 Newtons because of the pull of Earth's gravity. On the moon, which has less gravity, the same mass would weigh less. Weight is measured with a scale, like the spring scale shown in the Figure below . The scale measures the force with which gravity pulls an object downward. To delve a little deeper into weight and gravity, watch this video:. Choices: - strength - work - light - gravity A:
gravity

Q: What forms as a result of decomposition when n2o is heated? Read this paragraph and choose the correct option from the provided answers: The oxides of nitrogen(III), nitrogen(IV), and nitrogen(V) react with water and form nitrogen-containing oxyacids. Nitrogen(III) oxide, N2O3, is the anhydride of nitrous acid; HNO2 forms when N2O3 reacts with water. There are no stable oxyacids containing nitrogen with an oxidation state of 4+; therefore, nitrogen(IV) oxide, NO2, disproportionates in one of two ways when it reacts with water. In cold water, a mixture of HNO2 and HNO3 forms. At higher temperatures, HNO3 and NO will form. Nitrogen(V) oxide, N2O5, is the anhydride of nitric acid; HNO3 is produced when N2O5 reacts with water: N 2 O 5(s) + H 2 O(l) 2HNO 3(aq) The nitrogen oxides exhibit extensive oxidation-reduction behavior. Nitrous oxide resembles oxygen in its behavior when heated with combustible substances. N2O is a strong oxidizing agent that decomposes when heated to form nitrogen and oxygen. Because one-third of the gas liberated is oxygen, nitrous oxide supports combustion better than air (one-fifth oxygen). A glowing splinter bursts into flame when thrust into a bottle of this gas. Nitric oxide acts both as an oxidizing agent and as a reducing agent. For example: oxidizing agent: P 4(s) + 6NO(g) P 4 O 6(s) + 3N 2(g). Choices: - ammonia and nitrogren - nitrogen and hydrogen - calcium and oxygen - nitrogen and oxygen A:
nitrogen and oxygen