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Direction: Choose the answer and indicate it by darkening the appropriate circle on your answer sheet.
Which arrow represents photosynthesis?
Which arrow represents respiration?
Which one of the following statements about energy is NOT correct?
A plant whose leaves are heavily coated with grease cannot carry out photosynthesis because
When an object absorbs heat,
The decomposition of water is shown in the following chemical equation:
The reaction can be done
In the chemical equation in item 6, which of the following statements about the equation is not correct?
The concentrations of carbon dioxide and oxygen in the atmosphere are kept relatively constant because of two natural processes known as photosynthesis and
Solutions A, B, and C and D have the following pH values, respectively: 12, 9, 7, 3.
Which of these solutions is acidic?
Which solutions can be mixed to form a neutral solution?
Fruits and vegetables last longer when placed in the refrigerator. What explains this fact?
Which of the following would happen when an acid is slowly poured to a basic solution?
A student wants to determine whether a certain liquid is acidic. Which of the following procedures would tell him whether or not it is so?