Answer the following question given this paragraph: Diamond is a form of carbon in which each carbon atom is covalently bonded to four other carbon atoms. This forms a strong, rigid, three-dimensional structure (see Figure below ). Diamond is the hardest natural substance, and no other natural substance can scratch it. This property makes diamonds useful for cutting and grinding tools as well as for rings and other jewelry (see Figure below ). Q: The hardest natural substance, diamond is a form of what element? Choices: - zirconium - zenon - hydrogen - carbon A:
carbon
(Question)
Answer the following question given this paragraph: Mercury is very close to the Sun, so it can get very hot. Mercury also has virtually no atmosphere. As the planet rotates very slowly, the temperature varies tremendously. In direct sunlight, the surface can be as hot as 427C (801F). On the dark side, the surface can be as cold as 183C (297F)! The coldest temperatures may be on the insides of craters. Most of Mercury is extremely dry. Scientists think that there may be a small amount of water, in the form of ice, at the planet's poles. The poles never receive direct sunlight. Q: What planet is closest to our sun? Choices: - Earth - Venus - Pluto - mercury A:
(Answer)
mercury
Ques: Answer the following question given this paragraph: What goes into the cell? Oxygen and glucose are both reactants of cellular respiration. Oxygen enters the body when an organism breathes. Glucose enters the body when an organism eats. Q: What element enters the body when an organism breathes? Choices: - helium - water - methane - oxygen A:
Ans: oxygen
(Q).
Answer the following question given this paragraph: Hydrogen is a very reactive gas, and the alkali metals are even more reactive. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements. The reactivity of alkali metals increases from the top to the bottom of the group, so lithium (Li) is the least reactive alkali metal and francium (Fr) is the most reactive. Because alkali metals are so reactive, they are found in nature only in combination with other elements. They often combine with group 17 elements, which are very "eager" to gain an electron. At the URL below, you can watch a video that shows just how reactive the alkali metals are. Q: Because alkali metals are so reactive, they are found in nature only in ________ with other elements? Choices: - isolation - cooperation - competition - combination A:
(A).
combination
Ques:Answer the following question given this paragraph: Another exception to Mendel's laws is a phenomenon called codominance . For example, our blood type shows codominance. Do you know what your blood type is? Are you A? O? AB? Those letters actually represent alleles. Unlike other traits, your blood type has three alleles, instead of two!. Q: What do the letters in our blood types represent? Choices: - genomes - proteins - iron levels - alleles A:

Ans:alleles
Question: Answer the following question given this paragraph: A protein is an organic compound made up of small molecules called amino acids . There are 20 different amino acids commonly found in the proteins of living things. Small proteins may contain just a few hundred amino acids, whereas large proteins may contain thousands of amino acids. Q: What is an organic compound made up of small molecules called amino acids called? Choices: - a carbohydrate - a fat - a compound - a protein A:
Answer:
a protein