Name: ______

Unit 1 Study Guide

1. What does CER stand for?

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2. Complete the chart below

Key Term / Definition / Examples
Substance
Compound
Molecule

3. Is each substances a molecule, a compound, or both?

Put an X in the appropriate columns

Substance / Element / Molecule / Compound
Water (H2O)
Carbon Dioxide (CO2)
Carbon (C)
Glucose (C6H12O6)
Sodium Chloride (NaCl)
Hydrogen (H2)

4. Complete the chart below

Key Term / Definition / Examples
Physical Property
Physical Change
Chemical Property
Chemical Change

5. Name the 4 signs of a chemical change.

  • ______
  • ______
  • ______
  • ______

6. What is the only way to be certain that a chemical change has taken place?

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7. Use your Periodic table of Elements to complete the chart below

Substance / Element 1 (name and number of atoms) / Element 2 (name and number of atoms) / Element 3 (name and number of atoms)
NaSO4
BaN3S5

8. Use the evidence below to determine if the substance is undergoing a physical or a chemical change.

Properties Before Change / / Properties After Change
Density / 3 g/mL / Density / 3 g/mL
Mass / 17 grams / Mass / 15 grams
Color / Yellow / Color / Orange
Chemical Properties /
  • ability to burn
  • acidity – 2 pH scale
/ Chemical Properties /
  • ability to burn
  • acidity – 2 pH scale

Substances Present / FBr2+ClNaO4 / Substances Present / FBr2+ClNaO4

Do the properties listed above indicate that a physical or a chemical change has occurred? Back your answer with evidence.

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9. Identify the claim, evidence and reasoning.

Underline the claim using a solid line, using a dotted line underline the evidenceand circle the reasoning.

Air is Matter. Matter is anything that has mass and takes up space. For example when a balloon is blown up, its mass increases from .065oz to .070oz, and the balloon now takes up more space. The change to mass and volume mean that air has mass and takes up space, therefore air is matter.

10. Identify each picture as an element, a compound or a molecule (some may use more than one term).

11. Write a CER that answers the following question.

Are the leaves changing color in the fall a physical or chemical change?

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12. Write a CER that answers the following question.

Is mixing salt and water together a physical or chemical change?

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