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Ninth Grade (Grade 9) Science Questions

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Grade 9 :: Food Chains and Webs by caryocs
Grade 9 :: Biotic and Abiotic 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 :: Human Reproduction by bfiles
Grade 9 :: Biochemical Pathways 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 :: Biochemical Pathways 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 :: Biochemical Pathways 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 :: Biochemical Pathways 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 :: Biochemical Pathways 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 :: Macromolecules 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 :: Human Reproduction by bfiles
Conception, or fertilization occurs when
  1. a dominant gene overrides a recessive gene.
  2. sperm from a male unites with an egg from a female.
  3. an egg matures in a female's ovary.
  4. all 23 pairs of chromosomes are present.
Grade 9 :: Biochemical Pathways by LBeth
[math]C_6H_12O_6 + 6O_2->6CO_2+6H_2O+en ergy [/math] is the balanced chemical equation for
  1. photosynthesis
  2. glycolysis
  3. cellular respiration
  4. Krebs cycle
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