pre chemistry test – Flashcards
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which phrase best describes an apple? (A) heterogenous mixture (B) homogenous compound (C) heterogenous substance (D) homogenous mixture
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A
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which of the following is not a chemical change? (A) paper being shredded (B) steel rusting (C) charcoal burning (D) newspaper yellowing in the sun
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A
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which element is paired with the wrong symbol? A. sulfur, S. B. potassium, P. C. nitrogen, N D. calcium, Ca
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B.
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the state of matter characterized by a definite volume and an indefinite shape is a A. solid B. liquid C. mixture D. gas
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B.
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(A) compound (B) heterogenous mixture (C) element (D) homogenous mixture Which description correctly identifies each of the following materials? 6. air
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6. D.
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(A) compound (B) heterogenous mixture (C) element (D) homogenous mixture Which description correctly identifies the following material? 7. carbon monoxide
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7. A.
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(A) compound (B) heterogenous mixture (C) element (D) homogenous mixture Which description correctly identifies the following material? 8. zinc
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8. C.
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(A) compound (B) heterogenous mixture (C) element (D) homogenous mixture Which description correctly identifies the following material? 9. B.
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9. B.
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the smallest particle of an element that retains its identity in a chemical reaction is a (A) proton (B) neutron (C) atom (D) compound
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C.
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classify the following as homogenous or heterogenous A. a page on a textbook
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heterogenous
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classify the following as homogenous or heterogenous B. a banana split
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heterogenous
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classify the following as homogenous or heterogenous C. the water in bottled water
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homogenous
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identify the following as a chemical or physical change A. melting of iron
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physical change
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identify the following as a chemical or physical change B. lighting a match
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chemical change
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identify the following as a chemical or physical change C. grinding corn
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physical change
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identify the following as a chemical or physical change D. souring of milk
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chemical change
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how is organic chemistry distinguished from inorganic chemistry?
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organic chemistry is study of chemicals containing carbon, inorganic chemistry is study of chemicals without carbon
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what is the name given to a chemist who studies the composition of matter?
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analytical chemist
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classify the following as physical or chemical change A. cookies are baked
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chemical change
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classify the following as physical or chemical change B. firefly emits light
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chemical change
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classify the following as physical or chemical change C. figure is carved from wood
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physical change
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classify the following as physical or chemical change D. caramel is made from sugar
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chemical change
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which of the following substances is not a homogenous mixture? A. gold ring B. spaghetti sauce C. cane sugar D. window glass E. river water f. bottled water
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b, c, e
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picture of candles burning, name 1 chemical change and 2 physical changes
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chemical change:wax burning physical changes:wax melting, wax vaporizing
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classify the following as physical or chemical change A. aspirin tablet is crushed to a powder
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physical change
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classify the following as physical or chemical change B. red nose turns brown
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chemical change
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classify the following as physical or chemical change C. grape juice turns to wine
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chemical change
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classify the following as physical or chemical change D. fingernail polish remover evaporates
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physical change
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classify the following as physical or chemical change E. bean seed sprouts
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chemical change
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classify the following as physical or chemical change F. piece of copper is beaten into a thin sheet
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physical change
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which of the following are true about every solution? A. solutions are in the liquid state B. solutions are homogenous C. solutions are mixtures D. solutions are composed of at least two compounds
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b, d
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match the following type of chemistry with a numbered statement A. Physical Chemistry 1. measure the level of lead in blood 2. study non-carbon based chemicals in rocks 3. investigate changes that occur as food is digested in the stomach 4. study carbon-based chemicals in coal 5. explain the energy transfer that occurs when ice melts
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explain the energy transfer that occurs when ice melts
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match the following type of chemistry with a numbered statement B. inorganic chemistry 1. measure the level of lead in blood 2. study non-carbon based chemicals in rocks 3. investigate changes that occur as food is digested in the stomach 4. study carbon-based chemicals in coal 5. explain the energy transfer that occurs when ice melts
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study non-carbon based chemicals in rocks
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match the following type of chemistry with a numbered statement C. organic chemistry 1. measure the level of lead in blood 2. study non-carbon based chemicals in rocks 3. investigate changes that occur as food is digested in the stomach 4. study carbon-based chemicals in coal 5. explain the energy transfer that occurs when ice melts
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study carbon-based chemicals in coal
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match the following type of chemistry with a numbered statement D. biochemistry 1. measure the level of lead in blood 2. study non-carbon based chemicals in rocks 3. investigate changes that occur as food is digested in the stomach 4. study carbon-based chemicals in coal 5. explain the energy transfer that occurs when ice melts
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investigate changes that occur as food is digested in the stomach
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match the following type of chemistry with a numbered statement E. analytical chemistry 1. measure the level of lead in blood 2. study non-carbon based chemicals in rocks 3. investigate changes that occur as food is digested in the stomach 4. study carbon-based chemicals in coal 5. explain the energy transfer that occurs when ice melts
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measure the level of lead in blood
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which of the following is not part of the scientific method? A. hypothesis B. experiment C. guess D. theory
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C. guess
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describe difference between organic and inorganic chemistry
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organic chemistry is study of chemicals that contain carbon, inorganic chemistry is study of chemicals that don't contain carbon
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purpose of experiment
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to test a hypothesis
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the branch of chemistry that studies chemical containing carbon is ? chemistry A. physical B. inorganic C. analytical D. organic
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D.
