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Eighth Grade (Grade 8) Chemistry Questions

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Grade 8 Acids and Bases
Grade 8 Biochemical Pathways
Which of the following statements correctly describes a primary distinction between respiration and photosynthesis?
  1. Photosynthesis needs oxygen, while respiration needs water
  2. Photosynthesis needs carbon dioxide, while respiration needs oxygen and sugars
  3. Photosynthesis makes oxygen, while respiration makes water
  4. Photosynthesis makes water, while respiration makes carbon dioxide
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Which best describes oxygen?
  1. Oxygen is a halogen.
  2. Oxygen is a nonmetal.
  3. Oxygen is a noble gas.
  4. Oxygen is a rare earth element.
Grade 8 Periodic Table and Elements
Which of the following best describes the element copper?
  1. Copper is a halogen.
  2. Copper is a metalloid.
  3. Copper is an alkali metal.
  4. Copper is a transition metal.
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Grade 8 Biochemical Pathways
Which chemical process happens in cells releasing energy?
  1. respiration
  2. photosynthesis
  3. breathing
  4. exercise
Grade 8 Periodic Table and Elements
Grade 8 Bonds and Mixing
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Which best describes chlorine?
  1. Chlorine is a halogen.
  2. Chlorine is a metalloid.
  3. Chlorine is a noble gas.
  4. Chlorine is a transition metal.
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