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Ninth Grade (Grade 9) Science Questions

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Grade 9 Respiration, Digestion, and Excretion
Carbon dioxide diffuses from the
  1. alveoli to the capillaries.
  2. capillaries to the alveoli.
  3. capillaries to the veins.
  4. venules to the bronchi.
Grade 9 DNA, RNA, and Genetics
Which nucleotides are classified as purines?
  1. adenine and thymine
  2. guanine and cytosine
  3. thymine and cytosine
  4. adenine and guanine
Grade 9 Biology
What is one of the general principles in biology?
  1. All living things have structure.
  2. Living things do not exist in isolation.
  3. Every living species is of the same family.
  4. People study biology because they are entering the field.
Grade 9 Cell Structure and Function
Which stage of the cell cycle lasts the longest amount of time?
  1. anaphase
  2. interphase
  3. metaphase
  4. prophase
  5. telephase
Grade 9 Solvents, Solutes, and Solubility
Nonpolar dissolves                .
  1. like
  2. polar
  3. nonpolar
  4. unlike
Grade 9 Circulatory and Immune Systems
An antibody is a special protein that helps fight infection.
  1. True
  2. False
Grade 9 Macromolecules
Organic molecules consumed for the stored energy in their chemical bonds is
  1. table salt.
  2. a producer.
  3. food.
  4. the food chain.
Grade 9 Organic Chemistry
What are the hydrocarbons called that provide living things with the most energy?
  1. lipids
  2. proteins
  3. nucleic acids
  4. carbohydrates
Grade 9 Properties of Matter
If the molecule indicated in the image were to have lack an ordered molecular arrangement, what would it be called?
Particle State - Solid
  1. a liquid
  2. an amorphous solid
  3. a gas
  4. a crystalline solid
Grade 9 Taxonomy
Which taxonomic level is used to distinguish plants?
  1. division
  2. function
  3. kingdom
Grade 9 Communities, Populations, and Ecosystems
What is biomass?
  1. total amount of living tissue without water
  2. total amount of living tissue with water
  3. total amount of water in living tissue
  4. total amount of life on earth
Grade 9 Periodic Table and Elements
Storms can result in the fixing of nitrogen.
  1. True
  2. False
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