PS8.1.4 VOCAB

Which of the following describes a physical change?

• A substance transforms into a new substance with different properties

• The form or appearance of a substance changes, but its chemical composition stays the same

• A substance dissolves into another substance

• A chemical reaction produces heat energy

True or False: A chemical change occurs when a substance transforms into a new substance with different properties.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a precipitate?

• A gas formed during a chemical reaction

• A solid formed from a chemical reaction in a solution

• A substance that dissolves in a solvent

• A liquid that forms from a chemical reaction

Which of the following is a solvent?

• A substance that dissolves in a solvent

• The substance that dissolves a solute to form a solution

• A solution that does not dissolve completely

• A solid that forms in a chemical reaction

What is a solute?

• A substance that dissolves a solute

• A solid formed from a chemical reaction

• A substance that dissolves in a solvent

• A homogeneous mixture

Which of the following best describes a solution?

• A mixture where the solute is unevenly distributed

• A mixture where the solvent and solute are chemically bonded

• A homogeneous mixture where a solute is evenly dissolved in a solvent

• A mixture of only solids

Which of the following is a chemical property?

• The color of a substance

• The ability of a substance to rust

• The melting point of a substance

• The density of a substance

True or False: A physical property can be observed without changing the composition of a substance.

• True

• False

What is an exothermic reaction?

• A reaction that absorbs heat energy

• A reaction that releases heat energy

• A reaction that does not produce heat

• A reaction where no energy is exchanged

Tags

NGSS.MS-PS1-4

True or False: An endothermic reaction absorbs heat energy.

• True

• False

Tags

NGSS.HS-PS1-4