Answer the following question given this paragraph: Measuring devices must be used correctly to get accurate measurements. Figure below shows the correct way to use a graduated cylinder to measure the volume of a liquid. Q: In a science lab, what device would you use to measure the volume of a liquid? Choices: - anemometer - Richter scale - yardstick - graduated cylinder A:
graduated cylinder
(Question)
Answer the following question given this paragraph: Proteins are an essential part of all organisms. They play many roles in living things. Certain proteins provide a scaffolding that maintains the shape of cells (structural proteins). Proteins also make up the majority of muscle tissues. Many proteins are enzymes that speed up chemical reactions in cells. Enzymes interact with the substrates (reactants) of a biochemical reaction, helping the reaction proceed at a much faster rate. Other proteins are antibodies that protect you from pathogens. Antibodies bond to foreign substances in the body and target them for destruction. Still other proteins help carry messages or materials in and out of cells (transport proteins) or around the body. For example, the blood protein hemoglobin (see Figure below ) bonds with oxygen and carries it from the lungs to cells throughout the body. Q: What type of protein speeds up chemical reactions in cells? Choices: - hemoglobin - lipids - collagen - enzyme A:
(Answer)
enzyme
Ques: Answer the following question given this paragraph: An addition polymer is a polymer formed by chain addition reactions between monomers that contain a double bond. Molecules of ethene can polymerize with each other under the right conditions to form the polymer called polyethylene. Q: What is a polymer formed by chain addition reactions between monomers that contain a double bond called? Choices: - a linear polymer - a branched polymer - an addition monolayer - an addition polymer A:
Ans: an addition polymer
(Q).
Answer the following question given this paragraph: Figure 2.22 When carbon forms single bonds with other atoms, the shape is tetrahedral. When two carbon atoms form a double bond, the shape is planar, or flat. Single bonds, like those found in ethane, are able to rotate. Double bonds, like those found in ethene cannot rotate, so the atoms on either side are locked in place. Q: When what common element forms single bonds with other atoms, the shape is tetrahedral, and when its atoms form a double bond, the shape is planar? Choices: - oxygen - hydrogen - silicon - carbon A:
(A).
carbon
Ques:Answer the following question given this paragraph: Strategy: A Based on the conductivity of the elements, determine whether each is a metal, a nonmetal, or a semimetal. Confirm your prediction from its physical appearance. B From the compounds each element forms, determine its common oxidation states. C If the element is a nonmetal, it must be located in the p block of the periodic table. If a semimetal, it must lie along the diagonal line of semimetals from B to At. Transition metals can have two oxidation states separated by one electron. D From your classification, the oxidation states of the element, and its physical appearance, deduce its identity. Solution:. Q: Conductivity, oxidation state and physical appearance are properties that help determine whether what are metals? Choices: - atoms - phases - organisms - elements A:

Ans:elements
Answer the following question given this paragraph: Precipitation maps show the amount of rainfall in different areas. Q: Precipitation maps show the amount of what in different areas? Choices: - population - heat - geographical variety - rainfall A:
rainfall