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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 Biochemical Pathways
Which chemical process happens in cells releasing energy?
  1. respiration
  2. photosynthesis
  3. breathing
  4. exercise
Grade 8 Biochemical Pathways
Which of the following correctly represents the word equation for the process of respiration?
  1. oxygen + carbon dioxide -> water + glucose
  2. water + carbon dioxide -> oxygen + glucose
  3. carbon dioxide + glucose -> water + oxygen
  4. oxygen + glucose -> water + carbon dioxide
Grade 8 Biochemical Pathways
Which of the following correctly lists the products of respiration?
  1. water + carbon dioxide
  2. oxygen + water
  3. glucose + carbon dioxide
  4. glucose + oxygen
Grade 8 Bonds and Mixing
Grade 8 Bonds and Mixing
Grade 8 Biochemical Pathways
Which word equation correctly represents photosynthesis?
  1. carbon dioxide + oxygen -> glucose + water
  2. carbon dioxide + water -> glucose + oxygen
  3. oxygen + glucose -> carbon dioxide + water
  4. water + oxygen -> glucose + carbon dioxide
Grade 8 Biochemical Pathways
Why do plants generate starch from glucose?
  1. So the plant can use it to make chloroplasts
  2. So it can be stored for later
  3. because plants use it for photosynthesis
  4. because plants use it for respiration
Grade 8 Periodic Table and Elements
Which statement is true about the periodic table?
  1. The periodic table allows you to easily compare the properties of one element to another.
  2. Each horizontal row of the periodic table is called group.
  3. Each vertical column of the periodic table is called period.
  4. All of the above are correct.
Grade 8 Properties of Matter
Which item would float in water? Water has a density of 1.00 gram per cubic centimeter.
  1. Aluminum - 2.64 grams per cubic centimeter
  2. Pure Gold - 19.24 grams per cubic centimeter
  3. Iron 7.21 - grams per cubic centimeter
  4. Cork 0.24 - gram per cubic centimeter
Grade 8 Properties of Matter
Grade 8 Periodic Table and Elements
Grade 8 Periodic Table and Elements
Grade 8 Biochemical Pathways
During which of these is oxygen being released?
  1. cellular respiration
  2. photosynthesis
  3. breathing
  4. fermentation
Grade 8 Macromolecules
Which of the following correctly describes the primary function of ATP in cells?
  1. ATP is the energy that cells use to do their work.
  2. ATP creates glucose in plants.
  3. ATP uses oxygen to make plants grow.
  4. ATP is another name for chloroplasts.
Grade 8 Periodic Table and Elements
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