Matter - Matters

What is a pure substance?

• A material that has a constant composition and consistent properties throughout.

• A mixture of different substances that can be separated by physical means.

• A substance that can exist in multiple phases at the same time.

• A compound that contains two or more different elements chemically bonded.

Tags

NGSS.MS-PS1-4

What is the difference between a physical change and a chemical change?

• A physical change alters the chemical composition of a substance, while a chemical change does not.

• A physical change involves a change in state, while a chemical change does not.

• A physical change does not alter the chemical composition of a substance, while a chemical change does.

• A physical change is reversible, while a chemical change is always irreversible.

Tags

NGSS.MS-PS1-4

What are the three states of matter?

• Solid, liquid, and gas.

• Solid, liquid, and plasma.

• Solid, gas, and vapor.

• Liquid, gas, and steam.

Tags

NGSS.MS-PS1-4

What are atoms?

• The smallest unit of a chemical element that retains its properties.

• The basic building blocks of matter, which make up all substances.

• A type of molecule that can exist independently.

• A form of energy that can be converted into matter.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is a mixture?

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

• A single substance that cannot be separated into its components.

• A solution where one substance is dissolved in another.

• A chemical reaction between two or more substances.

What is an example of a chemical property?

• Melting of ice

• Rusting of iron

• Dissolving sugar in water

• Boiling of water

What is a solvent?

• A substance that is dissolved in a solution.

• The substance in a solution that dissolves the solute.

• A type of chemical reaction.

• A solid that forms from a solution.

What is a chemical property?

• A characteristic of a substance that can only be observed during a chemical reaction, such as rusting.

• A property that can be measured without changing the substance, like density.

• A feature that describes how a substance interacts with light, such as color.

• A trait that indicates the physical state of a substance, like solid or liquid.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is an example of a physical change?

• Melting ice

• Burning wood

• Dissolving sugar in water

• Rusting iron

What is the law of conservation of mass?

• In a chemical reaction, mass is neither created nor destroyed.

• Mass can be created but not destroyed in a chemical reaction.

• The total mass of products is always greater than the total mass of reactants.

• Mass is only conserved in physical changes, not in chemical reactions.

Tags

NGSS.MS-PS1-5