Answer the following question given this paragraph: Electrons are transferred from hair to a balloon rubbed against the hair. Then the oppositely charged hair and balloon attract each other. Q: When a balloon is rubbed against hair, why do they attract each other? Choices: - constantly electron charge - lean electron charge - same electron charge - opposite electron charge A:
opposite electron charge
(Question)
Answer the following question given this paragraph: Characteristics of Amniotes The amniotic egg is the key characteristic of amniotes. In amniotes that lay eggs, the shell of the egg provides protection for the developing embryo while being permeable enough to allow for the exchange of carbon dioxide and oxygen. The albumin, or egg white, provides the embryo with water and protein, whereas the fattier egg yolk is the energy supply for the embryo, as is the case with the eggs of many other animals, such as amphibians. However, the eggs of amniotes contain three additional extra-embryonic membranes: the chorion, amnion, and allantois (Figure 29.20). Extra-embryonic membranes are membranes present in amniotic eggs that are not a part of the body of the developing embryo. While the inner amniotic membrane surrounds the embryo itself, the chorion surrounds the embryo and yolk sac. The chorion facilitates exchange of oxygen and carbon dioxide between the embryo and the egg's external environment. The amnion protects the embryo from mechanical shock and supports hydration. The allantois stores nitrogenous wastes produced by the embryo and also facilitates respiration. In mammals, membranes that are homologous to the extra-embryonic membranes in eggs are present in the placenta. Q: In amniotes that lay eggs, the shell of the egg provides protection for the developing embryo while being permeable enough to allow for the exchange of carbon dioxide and this? Choices: - gas - tissue - Protein - oxygen A:
(Answer)
oxygen
Ques: Answer the following question given this paragraph: The standard unit for mass is the kilogram . The kilogram's standard is a block of platinum-iridium metal kept near Paris, France. Other countries, of course, keep copies. A kilogram is denoted "kg" and is a multiple of the smaller unit of mass, the gram ("g"). Q: What is the standard unit for mass? Choices: - ounce - meter - pound - kilogram A:
Ans: kilogram
(Q).
Answer the following question given this paragraph: Salt isn't the only solute that dissolves in water. In fact, so many things dissolve in water that water is sometimes called the universal solvent. Water is such a good solvent because it is a very polar compound. A polar compound has positively and negatively charged ends. Solutes that are also charged are attracted to the oppositely charged ends of water molecules. This allows the water molecules to pull the solute particles apart. Q: Which compound has positively and negatively charged ends? Choices: - tumultuous compound - non-polar compound - real compound - polar compound A:
(A).
polar compound
Ques:Answer the following question given this paragraph: Two important concepts associated with the ecosystem are niche and habitat. Q: Two important concepts, niche and habitat, are associated with what? Choices: - natural selection - plant - water - ecosystem A:

Ans:ecosystem
Answer the following question given this paragraph: The difference in electric potential energy is measured with a voltmeter in units called volts. Q: Difference in electric potential energy are measured in what basic unit? Choices: - moles - watts - knots - volts A:
volts