| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
During digestion, after proteins are broken down where does the undigested food go next?
large intestine |
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small intestine |
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stomach |
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esophagus |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
The number system most used in science is the:
metric system |
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American system |
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English system |
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British system |
The metric system is a number system that designates one base unit for each type of measurement. For example, the base unit for length is the meter and the base unit for mass is the gram.
A __________ is the smallest multi-atom particle of an element or compound that can exist and still retain the characteristics of the element or compound.
molecule |
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isotope |
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neutron |
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ion |
A molecule is the smallest multi-atom particle of an element or compound that can exist and still retain the characteristics of the element or compound. The molecules of elements consist of two or more similar atoms, the molecules of compounds consist of two or more different atoms.
In which type of compound are electrons shared between atoms?
molecular |
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ionic |
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chemical |
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covalent |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In covalent compounds, electrons are shared between atoms. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
Which of the following is not a characteristic of the Sun?
is a yellow dwarf star |
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formed 2.6 billion years ago |
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makes up over 99% of the mass of the solar system |
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is composed of hydrogen and helium |
The Sun is a G-type main-sequence star (G2V) but is informally known as a yellow dwarf star. Composed of 73% hydrogen and 25% helium, the hot plasma that makes up the Sun reaches 9,900°F (5,505°C) at the surface. It formed approximately 4.6 billion years ago and makes up 99.86% of the mass in the solar system.