(Q).
Answer the following question given this paragraph: Water is an example of a common chemical compound. As you can see in the Figure below , each water molecule consists of two atoms of hydrogen and one atom of oxygen. Water always has this 2:1 ratio of hydrogen to oxygen. Like water, all compounds consist of a fixed ratio of elements. It doesn't matter how much or how little of a compound there is. It always has the same composition. Q: What molecule consists of two atoms of hydrogen and one atom of oxygen? Choices: - carbon monoxide - hydrogen peroxide - air - water A:
(A).
water

(Q).
Answer the following question given this paragraph: Mirrors are made from highly reflective metal that is applied to a curved or flat piece of glass. Converging mirrors can be used to focus light headlights, telescopes, satellite TV receivers, and solar cookers all rely on this principle. Like lenses, mirrors can create images. Q: What objects are made from highly reflective metal that is applied to a curved or flat piece of glass? Choices: - frames - vases - machines - mirrors A:
(A).
mirrors

(Q).
Answer the following question given this paragraph: Image copyright Sebastian Kaulitzki, 2013. The small intestine is lined with tiny villi that help absorb nutrients . Used under license from Shutterstock. com. Q: What is the small intestine lined with that helps with nutrient absorption? Choices: - bile - hilum - cannula - villi A:
(A).
villi