Answer the following question given this paragraph: Water is an amazing molecule. It has a very simple chemical formula, H 2 O. It is made of just two hydrogen atoms bonded to one oxygen atom. Water is remarkable in terms of all the things it can do. Lots of things dissolve easily in water. Some types of rock can even completely dissolve in water! Other minerals change by adding water into their structure. Q: What is the common term for the chemical formula h 2 0? Choices: - hydrogen - air - oxygen - water A:
water
(Question)
Answer the following question given this paragraph: Q: Hagfishes have a skull made of what? Choices: - gelatin - chitin - bone - cartilage A:
(Answer)
cartilage
Ques: Answer the following question given this paragraph: The force of friction between these two blocks is related to two factors. The first factor is the roughness of the surfaces that are interacting, which is called the coefficient of friction , (Greek letter mu). The second factor is the magnitude of the force pushing the top block down onto the lower block. It is reasonable that the more forcefully the blocks are pushed together, the more difficult it will be for one to slide over the other. The force pushing these blocks together is the result of gravity acting on the top block and pressing it against the bottom block, which resists the weight with an equal and opposite force called the normal force . The force of friction can be calculated by. Q: The roughness of interacting surfaces and the magnitude of force pushing one object onto another are two factors related to what force? Choices: - energy - tension - temperature - friction A:
Ans: friction
(Q).
Answer the following question given this paragraph: Blood vessels help regulate body processes by either constricting (becoming narrower) or dilating (becoming wider). These actions occur in response to signals from the autonomic nervous system or the endocrine system. Constriction occurs when the muscular walls of blood vessels contract. This reduces the amount of blood that can flow through the vessels (see Figure below ). Dilation occurs when the walls relax. This increases blood flows through the vessels. Q: What structures of the cardiovascular system help regulate body processes by either constricting or dilating? Choices: - muscles - cartilage - capillaries - blood vessels A:
(A).
blood vessels
Ques:Answer the following question given this paragraph: Salamanders belong to a group of approximately 500 species of amphibians. The order Urodela, containing salamanders and newts, is divided into three suborders:. Q: What is the name of the order that salamanders belong to? Choices: - oronthalic - aneuploid - platyhelminth - urodela A:

Ans:urodela
Ques:Answer the following question given this paragraph: conditions in the new environment, threatening the species that exist there. For this reason, exotic species are also called invasive species. Exotic species can threaten other species through competition for resources, predation, or disease. Q: Why are exotic species also called invasive species? Choices: - disregard other species - imitate other species - help other species - threaten other species A:

Ans:
threaten other species