9 - Chem vocab 1.1-1.2, Lab Safety - March 8

What is the definition of matter?

• Anything that can release energy through burning

• A type of pure substance that cannot be broken down into simpler substances by physical or chemical means

• Anything that has mass and takes up space

• A blend of two or more pure substances in which each substance retains its individual properties

Which of the following is an example of a pure substance?

• Salt water

• Air

• Table salt (NaCl)

• Milk

What distinguishes a mixture from a compound?

• A compound cannot be broken down into simpler substances by chemical means while a mixture can.

• A mixture has a definite composition while a compound does not.

• A mixture can be separated by physical means while a compound cannot.

• A mixture is a type of pure substance that can be broken down but a compound cannot.

Which of the following is an example of an element?

• Water (H2O)

• Salt water

• Carbon dioxide (CO2)

• Neon (Ne)

What is a compound?

• A process in which the atoms of one or more pure substances are rearranged to form a different substance(s)

• A pure substance made up of two or more elements that can only be separated by chemical means

• A blend of two or more pure substances that can be separate by physical means

• Matter that has mass and takes up space

What is a chemical reaction?

• A blend of two or more pure substances in which each substance retains its individual properties

• A type of pure substance that cannot be broken down into simpler substances by physical or chemical means

• A process in which the atoms of one or more pure substances are rearranged to form a different substance(s)

• The produced compounds when substances are mixed together

What are physical properties of matter?

• Characteristics that can be observed or measured without changing the chemical identity of the substance

• Descriptions of the ability of matter to interact with other substances

• New substances formed when chemical reactions occur

• Compounds and elements that can react to form new compounds

Which of the following is an example of a chemical property?

• Malleability

• Viscosity

• Reactivity with acids

• Solubility

What is meant by the solubility of a substance?

• The ability to conduct electricity

• The ability to dissolve

• The ability to conduct heat

• The state of matter

What type of reaction is described by the example of forest fires reacting chemical compounds in plants with oxygen?

• Synthesis reaction

• Decomposition reaction

• Combustion reaction

• Precipitation reaction