Elements, compounds, and mixtures Quiz

What is an element?

• A substance that can be broken down into simpler substances by chemical means.

• A substance that is composed of only one type of atom.

• A substance that can be broken down into simpler substances by physical means.

• A substance that cannot be broken down into simpler substances by chemical means.

Give an example of an element.

• nitrogen

• oxygen

• helium

• carbon

What is a compound?

• A compound is a substance formed by the mechanical combination of two or more elements.

• A compound is a substance formed by the chemical combination of two or more elements in definite proportions.

• A compound is a substance formed by the biological combination of two or more elements.

• A compound is a substance formed by the physical combination of two or more elements.

Tags

NGSS.MS-PS1-1

How are compounds different from elements?

• Compounds are made up of two or more elements chemically combined, while elements are pure substances made up of only one type of atom.

• Compounds are pure substances made up of only one type of atom, while elements are made up of two or more elements chemically combined.

• Compounds are pure substances made up of only one type of atom, while elements are made up of two or more atoms chemically combined.

• Compounds are made up of only one type of atom, while elements are made up of two or more atoms chemically combined.

What is a mixture?

• A single substance that is chemically bonded together.

• A combination of two or more substances that are chemically bonded together.

• A substance that cannot be separated into its constituent parts.

• A combination of two or more substances that are not chemically bonded together.

Provide an example of a mixture.

• Milk and cereal.

• Oil and vinegar.

• Sugar and water.

• Salt and water

What are physical properties?

• Physical properties are characteristics of matter that can only be observed but not measured.

• Physical properties are characteristics of matter that can be changed without affecting the substance's composition.

• Physical properties are characteristics of matter that can only be measured but not observed.

• Physical properties are characteristics of matter that can be observed or measured without changing the substance's composition.

Give three examples of physical properties.

• color, density, melting point

• odor, solubility, boiling point

• hardness, malleability, conductivity

• taste, viscosity, reactivity

What are chemical properties?

• Characteristics of a substance that describe its physical state.

• Characteristics of a substance that describe its color.

• Characteristics of a substance that describe how it reacts or interacts with other substances.

• Characteristics of a substance that describe its smell.

Provide two examples of chemical properties.

• 1. Density: The measure of how much mass is contained in a given volume of a substance.

• 1. Flammability: The ability of a substance to burn or ignite when exposed to a flame. 2. Reactivity: The tendency of a substance to undergo a chemical reaction with other substances.

• 2. Solubility: The ability of a substance to dissolve in a solvent.

• 3. Conductivity: The ability of a substance to conduct electricity or heat.