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Ninth Grade (Grade 9) Chemistry Questions

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Grade 9 :: Properties of Matter by lisamarie137
Define mass.
  1. the amount of space occupied by an object
  2. the measurement of the quantity of matter in an object
  3. the mass per unit volume of a material
  4. the mass per unit density of a material
Grade 9 :: Biochemistry by PMISIAS
Cellular respiration is
  1. The process of breaking down chemical energy stored in bonds into energy that can be used by the cell
  2. The process of creating food for the cell
  3. The process of combining oxygen and water to produce another substance to be transported
  4. The process of making proteins
Grade 9 :: Biochemistry by PMISIAS
Which of the following accurately describes the products of cellular respiration?
  1. carbon dioxide and water
  2. oxygen and carbon dioxide
  3. water and glucose
  4. glucose and oxygen
Grade 9 :: Biochemistry by PMISIAS
Which of the following most accurately describes the purpose of cellular respiration?
  1. to breakdown glucose into energy that can be used for cellular functions
  2. to breakdown usable energy into smaller parts
  3. to breakdown different types of substances to be used to build other parts of the cell
  4. all of the above
Grade 9 :: Properties of Matter by lisamarie137
Define volume.
  1. the amount of space occupied by an object
  2. the measurement of the quantity of matter in an object
  3. the mass per unit volume of a material
  4. the mass per unit density of a material
Grade 9 :: Biochemistry by PMISIAS
Which of the following accurately describes the products of photosynthesis?
  1. oxygen and carbon dioxide
  2. glucose and oxygen
  3. carbon dioxide and water
  4. water and glucose
Grade 9 :: Properties of Matter by lisamarie137
What is the formula used to find the mass of an object?
  1. [math]M=DV[/math]
  2. [math]M=D/V[/math]
  3. [math]M=M/V[/math]
  4. [math]M=VM[/math]
Grade 9 :: Biochemistry by PMISIAS
Enzymes are critical for biological reactions to occur in an organism. Enzymes help chemical reactions occur because
  1. They speed up reactions by adding more substrates
  2. They slow reactions down by increasing the activation energy
  3. They speed up reactions by lowering the activation energy
  4. They slow down reactions by changing the overall temperature
Grade 9 :: Biochemistry by PMISIAS
Which of the following accurately describes the purpose of photosynthesis?
  1. Release energy by breaking down glucose
  2. Store energy in the form of carbon dioxide
  3. Use sunlight energy to create sugars
  4. Create water that can hydrate the body
Grade 9 :: Bonds and Mixing by bruno246
What is it called when two or more elements share atoms?
  1. covalent bond
  2. ionic bond
  3. compound
  4. chemical equation
Grade 9 :: Properties of Matter by jlovering
What is the best explanation for why products may have different cooking instructions for high altitudes?
  1. High altitudes may have lower atmospheric pressure, which may reduce the boiling point of water
  2. High altitudes may have high atmospheric pressure which lowers the boiling point of water
  3. Water boils at a higher temperature due to increased oxygen at high elevations
  4. Water boils at a lower temperature due to decreased oxygen at higher altitudes
  5. People who live in the mountains do not know how to use stoves
Grade 9 :: Properties of Matter by jlovering
During vaporization, which of the following occurs:
  1. Intermolecular bonds are broken
  2. Density decreases
  3. Liquids become gases
  4. Temperature remains constant
  5. All of the above
Grade 9 :: Properties of Matter by jlovering
Which of the following best describes temperature?
  1. The number of molecules in a substance
  2. The average speed of the molecules in a substance
  3. The number of collisions between molecules in a substance in their container
  4. The ratio of the amount of matter in the space it occupies in a substance
  5. The force of gravity on the molecules of a substance
Grade 9 :: Biochemistry by PMISIAS
Which group of organic compounds includes the enzymes?
  1. starches
  2. carbohydrates
  3. lipids
  4. proteins
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