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Sixth Grade (Grade 6) Molecules and Compounds Questions

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Grade 6 Molecules and Compounds
What does C2O5 mean?
  1. 2 carbon atoms and 5 oxygen atoms
  2. 3 carbon atoms and no oxygen atoms
  3. 4 carbon atoms and no oxygen atoms
  4. 5 carbon atoms and 2 oxygen atoms
Grade 6 Molecules and Compounds
A(n)                 is a combination of atoms.
  1. atom
  2. molecule
  3. gas
  4. matter
Grade 6 Molecules and Compounds
What is a type of matter made of a combination of elements?
  1. molecule
  2. element
  3. compound
Grade 6 Molecules and Compounds
When two or more atoms of elements join together, they create                .
  1. atoms
  2. electrons
  3. protons
  4. molecules
Grade 6 Molecules and Compounds
                are composed of two or more different elements.
  1. Compounds
  2. Molecules
  3. Mixtures
Grade 6 Molecules and Compounds
Compounds are pure substances made of
  1. two or more kinds of atoms.
  2. two of the same type of atom.
  3. more than 5 types of atoms.
  4. mixtures.
Grade 6 Molecules and Compounds
When two or more elements combine chemically, which of the following would be formed?
  1. DNA
  2. atoms
  3. compounds
  4. molecules
Grade 6 Molecules and Compounds
Water (H2O) and salt (NaCl) are what?
  1. Elements
  2. Compounds
  3. Mixtures
  4. Solutions
Grade 6 Molecules and Compounds
The smallest unit of many compounds is called a(n)                .
  1. molecule
  2. atom
  3. element
  4. DNA
Grade 6 Molecules and Compounds
The small number after an element symbol, like 2 in H2O, is called a(n)                .
  1. square root
  2. subscript
  3. prime number
  4. equation
Grade 6 Molecules and Compounds
Molecules are the tiniest building blocks of matter.
  1. True
  2. False
Grade 6 Molecules and Compounds
Mark the 3 things that molecules can do when they meet each other.
  1. Switch atoms and make new molecules.
  2. Some atoms may disappear.
  3. The molecules may join together.
  4. The molecules may break apart or separate from each other.
  5. New atoms may appear out of no where.
Grade 6 Molecules and Compounds
Atoms hook together to create                .
  1. more atoms
  2. chemistry
  3. molecules
Grade 6 Molecules and Compounds
Pure substances are made from only one type of element.
  1. True
  2. False
Grade 6 Molecules and Compounds
When atoms stick together, they make                .
  1. membranes
  2. molecules
Grade 6 Molecules and Compounds
Compounds are formed as a result of                       .
  1. a physical combination
  2. being pure
  3. a filtration mixture
  4. a chemical combination
Grade 6 Molecules and Compounds
The difference between an atom and a molecule is that
  1. most atoms are bonded together to make a molecule.
  2. an atom can be seen by scientists, but a molecule cannot.
  3. atoms and molecules are the same and have no differences.
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