Answer the following question given this paragraph: Did you ever see workers sandblasting a building to clean it? Sand is blown onto the surface to scour away dirt and debris. Wind-blown sand has the same effect. It scours and polishes rocks and other surfaces. Wind-blown sand may carve rocks into interesting shapes ( Figure below ). This form of erosion is called abrasion. It occurs any time rough sediments are blown or dragged over surfaces. Can you think of other ways abrasion might occur?. Q: Sandblasting a surface exemplifies what form of erosion? Choices: - wind - glacial - water - abrasion A:
abrasion
(Question)
Answer the following question given this paragraph: Animal Bioenergetics All animals must obtain their energy from food they ingest or absorb. These nutrients are converted to adenosine triphosphate (ATP) for short-term storage and use by all cells. Some animals store energy for slightly longer times as glycogen, and others store energy for much longer times in the form of triglycerides housed in specialized adipose tissues. No energy system is one hundred percent efficient, and an animal's metabolism produces waste energy in the form of heat. If an animal can conserve that heat and maintain a relatively constant body temperature, it is classified as a warm-blooded animal and called an endotherm. The insulation used to conserve the body heat comes in the forms of fur, fat, or feathers. The absence of insulation in ectothermic animals increases their dependence on the environment for body heat. The amount of energy expended by an animal over a specific time is called its metabolic rate. The rate is measured variously in joules, calories, or kilocalories (1000 calories). Carbohydrates and proteins contain about 4.5 to 5 kcal/g, and fat contains about 9 kcal/g. Metabolic rate is estimated as the basal metabolic rate (BMR) in endothermic animals at rest and as the standard metabolic rate (SMR) in ectotherms. Human males have a BMR of 1600 to 1800 kcal/day, and human females have a BMR of 1300 to 1500 kcal/day. Even with insulation, endothermal animals require extensive amounts of energy to maintain a constant body temperature. An ectotherm such as an alligator has an SMR of 60 kcal/day. Energy Requirements Related to Body Size Smaller endothermic animals have a greater surface area for their mass than larger ones (Figure 33.4). Therefore, smaller animals lose heat at a faster rate than larger animals and require more energy to maintain a constant internal temperature. This results in a smaller endothermic animal having a higher BMR, per body weight, than a larger endothermic animal. Q: Metabolism produces waste energy in the form of heat, which helps what type of animal conserve and maintain heat at a relatively constant body temperature? Choices: - lizard - cold-blooded (ectotherm) - amphibian - warm-blooded (endotherm) A:
(Answer)
warm-blooded (endotherm)
Ques: Answer the following question given this paragraph: Unsaturated hydrocarbons that contain one or more triple bonds are called alkynes . The names of specific alkynes always end in yne and have a prefix for the number of carbon atoms. The structural formula in the Figure below represents the smallest alkyne, named ethyne, which has two carbon atoms and two hydrogen atoms (C 2 H 2 ). Ethyne is also called acetylene. It is burned in acetylene torches, like the one pictured in the Figure below . The flame of an acetylene torch is so hot that it can melt metal. Q: Alkynes are what type of compound? Choices: - reversible hydrocarbons - proteins hydrocarbons - Split Hydrocarbons - unsaturated hydrocarbons A:
Ans: unsaturated hydrocarbons
(Q).
Answer the following question given this paragraph: Flickr:xiquinhosilva. Oceans are made of a solution of salt and water . CC BY 2.0. Q: Oceans are made of a solution of what? Choices: - water and carbon - salt and carbon - salt and algae - salt and water A:
(A).
salt and water
Ques:Answer the following question given this paragraph: In the chest, the trachea divides as it enters the lungs to form the right and left bronchi . The bronchi contain cartilage, which prevents them from collapsing. Mucus in the bronchi traps any remaining particles in air. Tiny, hair-like structures called cilia line the bronchi and sweep the particles and mucus toward the throat so they can be expelled from the body. Q: In the chest, the trachea divides as it enters the lungs to form the right and left what? Choices: - alveoli - ventricle - atrium - bronchi A:

Ans:bronchi
Ques: Answer the following question given this paragraph: In prophase II, once again the nucleolus disappears and the nucleus breaks down. The chromatin condenses into chromosomes. The spindle begins to reform as the centrioles move to opposite sides of the cell. Q: In which stage does the chromatin condense into chromosomes? Choices: - Metaphase I - Telophase II - Anaphase I - prophase ii A:
Ans:
prophase ii