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Ninth Grade (Grade 9) Science Questions

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Grade 9 :: Scientific Method by kurtman
Choose the answer that best displays the use of an independent and dependent variable.
  1. Frank sets the temperature of a room to 31 degrees Celsius. He will come back later to record the height of the petunias.
  2. Mike creates three different solutions. He pours each one on 3 different plants and will observe which one grows faster.
  3. Emily observes a change in color of a metal, she records the color in her data section.
  4. Daniel changes his data after realizing it does not align with his hypothesis. He adds extra information to his conclusion which he made up.
Grade 9 :: Ecology by caryocs
Which is a biotic factor operating within an ecosystem?
  1. the type of climate in a given region
  2. the carnivores that consume other animals
  3. the amount of helium gas in the air
  4. the rate of flow of water in a river
Grade 9 :: DNA, RNA, and Genetics by PMISIAS
The process by which RNA is made from DNA is called
  1. translation
  2. transcription
  3. replication
  4. respiration
Grade 9 :: Ecology by caryocs
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 :: Cell Structure and Function by PMISIAS
A student views cells from several different prokaryotic and eukaryotic organisms under a high-powered microscope. Which of the following statements describes how the prokaryotic cells appear different from the eukaryotic cells?
  1. The prokaryotic cells do not have a nucleus
  2. The prokaryotic cell are much larger
  3. The prokaryotic cells have mitochondria
  4. The prokaryotic cells have a less distinct shape
Grade 9 :: Human Reproduction by applered
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 :: 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 :: 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 :: Cell Structure and Function by PMISIAS
Grade 9 :: Cell Structure and Function by PMISIAS
Which of the following accurately describes the locations of photosynthesis and respiration in plant cells?
  1. Both photosynthesis and respiration occur in the cytoplasm
  2. Photosynthesis occurs in the chloroplast, while respiration occurs in the mitochondria
  3. Photosynthesis occurs in the mitochondria, while respiration occurs in the chloroplast
  4. Photosynthesis occurs in the chloroplast, but plant cells do not perform respiration
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