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Ninth Grade (Grade 9) Chemistry Questions

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Grade 9 :: Biochemistry 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
Grade 9 :: Bonds and Mixing by der1228
Grade 9 :: Properties of Matter by kaitlyn_woods
What is matter?
  1. anything that has mass and takes up space
  2. anything that has momentum and takes up space
  3. the study of properties of mass and how it changes
  4. something that cannot be broken down nto any other substances
Grade 9 :: Properties of Matter by sackjd
Grade 9 :: Atomic Structure by der1228
The three particles that make up an atom are
  1. protons, neutrons, and isotopes
  2. neutrons, isotopes, and electrons
  3. positives, negatives, and electrons
  4. protons, neutrons, and electrons.
Grade 9 :: Properties of Matter by sackjd
What can be said about the molecules represented in the diagram?
Particle State - Gas
  1. The molecules move very slowly.
  2. The molecules are very close together.
  3. The molecules have a natural resistance to flowing.
  4. The molecules have a very high energy state.
Grade 9 :: Biochemistry by clperez
What is the body's ability to remain at a constant internal environment called?
  1. metabolism
  2. homeostasis
  3. active transport
  4. positive feedback
Grade 9 :: Organic Chemistry by sackjd
Grade 9 :: Biochemistry by meganber
Which of these is NOT a stage of cell respiration?
  1. Calvin cycle
  2. Krebs cycle
  3. Glycolysis
  4. Electron transport chain
Grade 9 :: Organic Chemistry by sackjd
Grade 9 :: Properties of Matter by sackjd
Grade 9 :: Organic Chemistry by sackjd
What shape do aromatic hydrocarbons form?
  1. rings
  2. chains
  3. branched chains
  4. spirals
Grade 9 :: Bonds and Mixing by sackjd
What happens to the electrons when two atoms form a covalent bond?
  1. The electrons are shared between the two atoms.
  2. One atom gives up an electron that is taken in by the other atom.
  3. Both atoms donate electrons to the nuclei of a third atom.
  4. One of the atoms collects all of the electrons from the other atom to use for itself.
Grade 9 :: Bonds and Mixing by sackjd
What are valence electrons?
  1. The electrons in the inner most energy ring of an atom.
  2. The electrons in the outer most energy rings of an atom.
  3. The electrons that are used to describe certain elements.
  4. The electrons that give a charge to an atom's nucleus.
Grade 9 :: Biochemistry by clperez
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