Answer the following question given this paragraph: Oxidation can be defined as the addition of oxygen to a molecule or the removal of hydrogen from a molecule. When an alkane is heated in the presence of an appropriate catalyst, it can be oxidized to the corresponding alkene in a reaction called a dehydrogenation reaction. Two hydrogen atoms are removed in the process. The alkene can be further oxidized to an alkyne by the removal of two more hydrogen atoms. Q: What is the addition of oxygen to a molecule or the removal of hydrogen from a molecule called? Choices: - precipitation - evaporation - ionization - oxidation A:
oxidation
(Question)
Answer the following question given this paragraph: A multicellular organism consists of many cells and has different types of cells that are specialized for various functions. All the cells work together and depend on each other to carry out the life processes of the organism. Individual cells are unable to survive on their own. Q: What type of organism has many different specialized cells that work together to carry out life processes? Choices: - single-celled organism - mutated organism - sequenced organism - multicellular organism A:
(Answer)
multicellular organism
Ques: Answer the following question given this paragraph: Heat is the energy that flows as a result of a difference in temperature. We use the symbol for heat. Heat, like all forms of energy, is measured in joules. Q: What is the energy that flows as a result of a difference in temperature? Choices: - electricity - polarity - magnetism - heat A:
Ans: heat
(Q).
Answer the following question given this paragraph: During late adulthood, people are not as physically able. For example, they usually have less muscle and slower reflexes. Their immune system also doesn't work as well as it used to. As a result, they have a harder time fighting diseases like the flu. The risk of developing diseases such as heart disease and cancer continues to rise. Arthritis is also common. In arthritis, joints wear out and become stiff and painful. As many as one in four late adults may develop Alzheimer's disease. In this disease, brain changes cause mental abilities to decrease. Q: What is it called when your joints start to wear out and they become stiff and painful? Choices: - adenitis - endometriosis - tendonitis - arthritis A:
(A).
arthritis
Ques:Answer the following question given this paragraph: Most gemstones are not used exactly as they are found in nature. Usually, gems are cut and polished. Figure below shows an uncut piece of ruby and a ruby that has been cut and polished. The way a mineral splits along a surface allows it to be cut to produce smooth surfaces. Notice that the cut and polished ruby sparkles more. Gems sparkle because light bounces back when it hits them. These gems are cut so that the most amount of light possible bounces back. Other gemstones, such as turquoise, are opaque, which means light does not pass through them. These gems are not cut in the same way. Q: What are gemstones known as when light cannot pass through them? Choices: - inorganic - blocking - protective - opaque A:

Ans:opaque
Answer the following question given this paragraph: A natural resource is something supplied by nature that helps support life. When you think of natural resources, you may think of fossil fuels, like the coal in the coal field pictured in Figure below . However, sunlight, wind, soil, and living things are also important natural resources. Q: What term refers to something supplied by nature that helps support life? Choices: - free resource - simple resource - existing resource - natural resource A:
natural resource