Answer the following question given this paragraph: Archaeological evidence suggests that people have been using tin for at least 5500 years. Tin is used to form many useful alloys (mixtures of two or more metals). Bronze is an alloy of tin and copper, while solder is an alloy of tin and lead. Q: What is an alloy of both tin and copper? Choices: - Cobalt - silver - Aluminium - bronze A:
bronze
(Question)
Answer the following question given this paragraph: You can see how Mendeleev organized the elements in the Figure below . From left to right across each row, elements are arranged by increasing atomic mass. Mendeleev discovered that if he placed eight elements in each row and then continued on to the next row, the columns of the table would contain elements with similar properties. He called the columns groups . They are sometimes called families, because elements within a group are similar but not identical to one another, like people in a family. Q: Mendeleev organized what basic units into rows and columns? Choices: - solutions - compounds - animals - elements A:
(Answer)
elements
Ques: Answer the following question given this paragraph: Chemistry is based on the modern atomic theory, which states that all matter is composed of atoms. Q: What branch of science is based on the modern atomic theory, which states that all matter is composed of atoms? Choices: - physics - psychology - biology - chemistry A:
Ans: chemistry
(Q).
Answer the following question given this paragraph: Group 15 of the periodic table is also called the nitrogen group. The first element in the group is the nonmetal nitrogen (N), followed by phosphorus (P), another nonmetal. Arsenic (As) ( Figure below ) and antimony (Sb) are the metalloids in this group, and bismuth (Bi) is a metal. All group 15 elements have five valence electrons, but they vary in their reactivity. Nitrogen, for example, is not very reactive at all, whereas phosphorus is very reactive and found naturally only in combination with other substances. All group 15 elements are solids, except for nitrogen, which is a gas. Q: Group 15 of the periodic table is also called which group? Choices: - oxygen - potassium - hydrogen - nitrogen A:
(A).
nitrogen
Ques:Answer the following question given this paragraph: The digestive system is the body system that digests food mechanically and chemically and absorbs nutrients. The digestive system also eliminates solid food waste. The major organs of the digestive system include the mouth, esophagus, stomach, and small and large intestines. These organs make up the long tube called the gastrointestinal (GI) tract, which goes from the mouth to the anus. Q: What is the body system that digests food mechanically and chemically and absorbs nutrients? Choices: - metabolism system - internal system - ingestion system - digestive system A:

Ans:digestive system
Answer the following question given this paragraph: The aphotic zone is water deeper than 200 meters. This is where too little sunlight penetrates for photosynthesis to occur. As a result, producers must make "food" by chemosynthesis , or the food must drift down from the water above. Q: What is the name of the zone where water is deeper than 200 meters called? Choices: - transition zone - euphotic zone - eccentric zone - aphotic zone A:
aphotic zone