Chemistry 101 Midterm #1 Test
Questions and Correct Answers.
What is chemistry? - Answer the transformation of matter
What are the two types of properties? - Answer chemical and physical
What is a physical property? - Answer a property that a sample of matter displays without
changing composition
What is a change in composition? - Answer a change at the molecular level
What are examples of physical properties? - Answer melting point, boiling point, colour,
density
What is a physical change? - Answer a change in property without a change in composition
What are examples of physical changes? - Answer changes in state, like melting or boiling
What cannot change in a physical change? - Answer the chemical formula or composition
What is a chemical property? - Answer something that will change the chemical formula when
I measure it
What are examples of chemical properties? - Answer combustion, whether it's an acid or base,
or any characteristic associated with a chemical reaction
What is a chemical change? - Answer changes in property and composition
What are examples of chemical changes? - Answer burning, oxidizing, dissolving, etc
What is matter? - Answer anything that has mass or occupies space
What is composition? - Answer a quantitative description of a sample's components
, How do molecules act in the solid state? - Answer even at absolute zero, molecules shake a
little bit
How do molecules act in the liquid state? - Answer the bonds are still there but the molecules
are moving farther apart
How do molecules act in the gaseous state? - Answer molecules break apart, bonds break
What is a good way to distinguish elements from atoms? - Answer You can buy elements, you
cannot buy atoms
What is a compound? - Answer a mixture of two different types of atoms bonded together
What is a substance? - Answer a form of matter with a constant composition
Name three physical separation techniques - Answer distillation, filtering, precipitating
What is a mixture? - Answer a form of matter with variable composition
What are examples of mixtures? - Answer sea water, blood
What is a homogeneous mixture? - Answer a mixture that appears uniform, such as blood,
paint, olive oil, or sea water
What is a heterogeneous mixture? - Answer a mixture that appears non uniform, such as
wand and water, granite, oil and water
Can mixtures be separated by physical means? - Answer Yes
What three categories of matter appear to be the same until you attempt to separate them? -
Answer elements, compounds and homogenous mixtures
How many base SI units are there? - Answer seven
What is the base SI unit for length? - Answer metre, m
What is the base SI unit for mass? - Answer kilogram, kg
Questions and Correct Answers.
What is chemistry? - Answer the transformation of matter
What are the two types of properties? - Answer chemical and physical
What is a physical property? - Answer a property that a sample of matter displays without
changing composition
What is a change in composition? - Answer a change at the molecular level
What are examples of physical properties? - Answer melting point, boiling point, colour,
density
What is a physical change? - Answer a change in property without a change in composition
What are examples of physical changes? - Answer changes in state, like melting or boiling
What cannot change in a physical change? - Answer the chemical formula or composition
What is a chemical property? - Answer something that will change the chemical formula when
I measure it
What are examples of chemical properties? - Answer combustion, whether it's an acid or base,
or any characteristic associated with a chemical reaction
What is a chemical change? - Answer changes in property and composition
What are examples of chemical changes? - Answer burning, oxidizing, dissolving, etc
What is matter? - Answer anything that has mass or occupies space
What is composition? - Answer a quantitative description of a sample's components
, How do molecules act in the solid state? - Answer even at absolute zero, molecules shake a
little bit
How do molecules act in the liquid state? - Answer the bonds are still there but the molecules
are moving farther apart
How do molecules act in the gaseous state? - Answer molecules break apart, bonds break
What is a good way to distinguish elements from atoms? - Answer You can buy elements, you
cannot buy atoms
What is a compound? - Answer a mixture of two different types of atoms bonded together
What is a substance? - Answer a form of matter with a constant composition
Name three physical separation techniques - Answer distillation, filtering, precipitating
What is a mixture? - Answer a form of matter with variable composition
What are examples of mixtures? - Answer sea water, blood
What is a homogeneous mixture? - Answer a mixture that appears uniform, such as blood,
paint, olive oil, or sea water
What is a heterogeneous mixture? - Answer a mixture that appears non uniform, such as
wand and water, granite, oil and water
Can mixtures be separated by physical means? - Answer Yes
What three categories of matter appear to be the same until you attempt to separate them? -
Answer elements, compounds and homogenous mixtures
How many base SI units are there? - Answer seven
What is the base SI unit for length? - Answer metre, m
What is the base SI unit for mass? - Answer kilogram, kg
