Unit 1 Exam Review Flashcards
(25 cards)
The variable that is observed during an experiment is called the _________:
dependent
What area of chemistry studies chemicals that generally do not contain carbon?:
inorganic
Which of the following would a chemist be most likely to study?
A) a leaf floating on water
B) a leaf changing colour in autumn
B) a leaf changing colour in autumn
Which step in the scientific method requires you to use your senses to obtain information?:
observation
Which of these steps should always be followed for effective problem solving?
A) Guess and check
B) Trial and error
C) Develop and implement a plan
D) All of the above
C) Develop and implement a plan
Which of the following best describes an example of pure chemistry?
A) Developing a cure for osteoporosis
B) Studying chemicals containing carbon
C) Developing a cheaper way to process oil
D) None of the above
B) Studying chemicals containing carbon
T/F: Theories summarize the results of many observations and experiments
False
An example of chemical technology is
A) The development of nylon as a replacement for silk
B) The use of aspirin to prevent heart attacks
C) The development of more fuel efficient vehicles
D) All of the above
D) All of the above
What is another name for homogeneous mixtures?:
Solution
A substance that forms a vapour is generally in what physical state at room temperature?:
Solid or liquid
In the chemical reaction in which sucrose is heated and decomposes to form carbon dioxide and water, what is/are the reactant(s)?:
sucrose
In the previous reaction when the sucrose decomposes, what happens to the mass during the reaction?:
Reactants and products have the same mass
Which state of matter has a definite volume and takes the shape of its container?:
Liquid
The first figure in a properly written chemical symbol is always:
Capitalized
What is true about compounds?:
They are substances
Which of the following is a homogenous mixture?
A) Beef Stew
B) Water
C) Salt
D) Salt Water
D) Salt water
Which of the following CANNOT be classified as a substance?
A) Calcium
B) Table Salt
C) Sugar
D) Air
D) Air
Which of the following is a chemical property?
A) Freezing point
B) Boiling point
C) The ability to react with oxygen
D) The ability to change state
C) The ability to react with oxygen
When paper turns yellow-brown upon exposure to sunlight, what type of change is likely taking place?:
A chemical change
Which of the following is NOT an example of matter?
A) heat
B) air
C) Table
D) book
A) heat
A physical change occurs when a piece of wood
A) burns
B) rots
C) is cut
D) decomposes
C) is cut
How are elements and compounds represented?:
Symbols and formulas
To be certain a chemical change has occurred, one must witness a change in
A) Composition
B) Size
C) Shape
D) All of the above
A) Composition
An example of an extensive property of matter is?
A) Hardness
B) Odor
C) Volume
D) Texture
C) Volume
