Q: In the universe as a whole, what is the most common element? Read this paragraph and choose the correct option from the provided answers: Abundance The elements vary widely in abundance. In the universe as a whole, the most common element is hydrogen (about 90% of atoms), followed by helium (most of the remaining 10%). All other elements are present in relatively minuscule amounts, as far as we can detect. On the planet Earth, however, the situation is rather different. Oxygen makes up 46.1% of the mass of Earth's crust (the relatively thin layer of rock forming Earth's surface), mostly in combination with other elements, while silicon makes up 28.5%. Hydrogen, the most abundant element in the universe, makes up only 0.14% of Earth's crust. Table 2.1 "Elemental Composition of Earth" lists the relative abundances of elements on Earth as a whole and in Earth's crust. Table 2.2 "Elemental Composition of a Human Body" lists the relative abundances of elements in the human body. If you compare Table 2.1 "Elemental Composition of Earth" and Table 2.2 "Elemental Composition of a Human Body", you will find disparities between the percentage of each element in the human body and on Earth. Oxygen has the highest percentage in both Saylor URL: http://www. saylor. org/books. Choices: - helium - carbon - oxygen - hydrogen A:
hydrogen

(Question)
Q: Organisms that obtain food from outside themselves (i.e. they don't make their own food) are known as what? Read this paragraph and choose the correct option from the provided answers: Fungi are heterotrophs, meaning they obtain food from outside themselves. Choices: - autotrophs - zygotes - fungi - heterotrophs A:
(Answer)
heterotrophs

Ques: Q: Chlamydia, gonorrhea, and syphilis are examples of which type of sti? Read this paragraph and choose the correct option from the provided answers: Bacterial STIs include chlamydia, gonorrhea, and syphilis. Choices: - non-contagious - viral - incurable - bacterial A:
Ans: bacterial

(Q).
Q: What are all scientific explanations and interpretations based on? Read this paragraph and choose the correct option from the provided answers: All scientific explanations and interpretations are based on facts. Choices: - changes - theories - controls - facts A:
(A).
facts

Ques:Q: The purpose of scientific investigations generally is to test a what? Read this paragraph and choose the correct option from the provided answers: Although this cartoon pokes fun at scientific hypotheses, the concept of hypothesis is one of the most important in science. Scientific investigations discover evidence that helps science advance, and the purpose of scientific investigations generally is to test hypotheses. Finding evidence to support or disprove hypotheses is how science advances. Choices: - theory - question - suggestion - hypothesis A:

Ans:hypothesis

Ques: Q: What type of earthquake creates a tsunami? Read this paragraph and choose the correct option from the provided answers: An underwater earthquake creates a tsunami this way: the movement of the crust displaces water. The displacement forms a set of waves. The waves travel at jet speed through the ocean. Since the waves have low amplitudes and long wavelengths, they are unnoticed in deep water. As the waves reach shore they compress. They are also pushed upward by the shore. For these reasons, tsunamis can grow to enormous wave heights. Tsunami waves can cause tremendous destruction and loss of life. Fortunately, few undersea earthquakes generate tsunamis. Choices: - Tectonic - collapse - volcanic - underwater A:
Ans:
underwater