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Ninth Grade (Grade 9) Chemistry Questions

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Grade 9 Biochemical Pathways
Which most accurately describes the purpose of cellular respiration?
  1. to decompose glucose into energy that can be used for cellular functions
  2. to decompose usable energy into smaller parts
  3. to decompose different types of substances to be used to construct other parts of the cell
  4. all of the above
Grade 9 Atomic Structure
Strong forces bind protons and neutrons together to form the                .
  1. nucleus
  2. electrons
  3. protons
  4. neutrons
  5. Atoms
Grade 9 Molecules and Compounds

This question is a part of a group with common instructions. View group »

NO-2 is named                .
  1. nitrite
  2. nitrate
  3. cyanide
  4. ammonium
Grade 9 Periodic Table and Elements
What is the symbol for the element oxygen?
  1. Og
  2. O
  3. Ox
  4. On
Grade 9 Bonds and Mixing
A solution of two or more metals such as brass is
  1. an alloy.
  2. a heterogeneous mixture.
  3. matter.
  4. a mixture.
Grade 9 Periodic Table and Elements
Isotopes are atoms of an element
  1. with the same number of electrons but different numbers of protons.
  2. that are radioactive.
  3. with a magnetic charge.
  4. with the same number of protons but different number of neutrons.
Grade 9 Biochemical Pathways
What is the sum of every chemical reaction that occurs in the body?
  1. metabolism
  2. homeostasis
Grade 9 Acids and Bases
Substances that release hydrogen ions (H+) when dissolved in water.
  1. buffers
  2. molecules
  3. acids
  4. salts
  5. bases
Grade 9 Atomic Structure
Isotopes of an element have the same number of                  .
  1. electrons
  2. neutrons
  3. protons
  4. valence electrons
Grade 9 Atomic Structure
An atom is electrically neutral if the number of                                            .
  1. electrons is equal to the atom mass
  2. neutrons is equal to electrons
  3. neutrons is equal to atom number
  4. protons is equal to the number of electrons
Grade 9 Periodic Table and Elements
What is the symbol for the element nitrogen?
  1. N
  2. Ni
  3. Ng
  4. Nn
Grade 9 Biochemistry
Two of the four principle classes of organic compounds are proteins and nucleic acids. What is the relationship between proteins and nucleic acids?
  1. Nucleic acids contain the information to make proteins.
  2. Proteins are long polymers of nucleic acids.
  3. Nucleic acids use proteins for energy.
  4. Nucleic acids are a subset of proteins.
Grade 9 Biochemistry
If you look through the microscope at a cell and see a nucleus, mitochondria, chloroplasts, and a cell wall, what type of cell are you looking at?
  1. eukaryotic plant cells
  2. eukaryotic animal cells
  3. prokaryotic plant cells
  4. bacteria cells
Grade 9 Periodic Table and Elements
Rn is the symbol for which element?
  1. Radon
  2. Radium
  3. Rhenium
  4. Rhodium
Grade 9 Macromolecules
Phospholipids are the primary component of
  1. cell membranes.
  2. cell walls.
  3. ribosomes.
  4. steroids.
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