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Search Results for oxygen - All Grades

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Grade 8 Fire and Rescue
In what way can a fire be brought under control?
  1. Add fuel
  2. Add oxygen
  3. Remove oxygen
  4. Remove carbon dioxide
Grade 6 Sun
The chemical makeup of the Sun is mainly                              .
  1. hydrogen and oxygen
  2. oxygen and helium
  3. hydrogen and helium
  4. hydrogen, helium, and sulfate
Grade 11 Sun
The Sun is composed mainly of which two gases?
  1. hydrogen and helium
  2. oxygen and carbon dioxide
  3. nitrogen and oxygen
  4. none of the above
Grade 10 Respiration, Digestion, and Excretion
The process of respiration is not concerned with                             .
  1. liberation of oxygen
  2. liberation of carbon dioxide
  3. liberation of energy
  4. intake of oxygen
Grade 9 Biochemistry
In living cells, which four elements are the most abundant?
  1. carbon, oxygen, nitrogen, and sulfur
  2. carbon, oxygen, hydrogen, and nitrogen
  3. carbon, oxygen, sulfur, and phosphorus
  4. carbon, sulfur, hydrogen, and magnesium
Grade 10 Properties of Matter
Water molecules are made up of what?
  1. 2 oxygen and 1 hydrogen
  2. 2 hydrogen and 1 oxygen
  3. 2 helium and 1 oxygen
  4. 2 Holmium and 1 osmium
Grade 9 Biochemical Pathways
Lactic acid occurs in                                                              when                                                             .
  1. muscle cells; oxygen is consumed faster than it is delivered
  2. heart cells; there is an excess buildup of oxygen
  3. lung cells; there is not sufficient oxygen available
  4. muscle cells; there is an excess buildup of oxygen
Grade 6 Molecules and Compounds
What does C2O5 mean?
  1. 2 carbon atoms and 5 oxygen atoms
  2. 3 carbon atoms and no oxygen atoms
  3. 4 carbon atoms and no oxygen atoms
  4. 5 carbon atoms and 2 oxygen atoms
College Molecules and Compounds
Which of the following statements regarding oxygen atoms in a water molecule is true?
  1. Oxygen is more positively charged than the hydrogen atoms are
  2. Oxygen attracts elements less strongly than the hydrogen atoms do
  3. Oxygen is more electronegative than the hydrogen atoms are
  4. Oxygen is electrically neutral
  5. An oxygen atom in one water molecule is attracted to the oxygen atom of a neighboring water molecule
Grade 8 Analytical Methods
None Fitness
During exercise, the oxygen needs of the heart:
  1. Remain the same as always.
  2. Decrease with the intensity of exercise
  3. Increase with the intensity of exercise
  4. None of the above.
Grade 7 Fitness
An activity that needs oxygen to complete it is called
  1. aerobic.
  2. anaerobic.
  3. exercise.
  4. metabolism.
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