Which of the following best describes a chemical change?

• A change in matter in which the substances that make up the matter change into other substances with different chemical and physical properties.

• A change in the size or shape of a substance.

• The energy due to the motion of particles.

• A solid that forms when two liquids combine.

What is a chemical property?

• The ability or inability of a substance to combine with or change into one or more new substances.

• A change in the size or shape of a substance.

• The law that matter cannot be created or destroyed.

• The energy due to the motion of particles.

What is thermal energy?

• The energy due to the motion of particles that make up an object.

• A change in the size or shape of a substance.

• A solid that forms when two liquids combine.

• The ability of a substance to combine with others.

Which of the following is an example of a physical change?

• Tearing a piece of paper.

• Burning wood.

• Rusting iron.

• Mixing vinegar and baking soda.

Which process is an example of a chemical change?

• Rusting of iron.

• Melting ice.

• Breaking a stick.

• Dissolving sugar in water.

What is a compound?

• A pure substance composed of two or more elements that are chemically combined

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

• A single element in its purest form

• A type of physical property

Which of the following best defines matter?

• Anything that has volume and mass

• A substance that can only be seen under a microscope

• A type of chemical reaction

• A property that can be measured without changing the substance

What is a physical property?

• A characteristic that can be observed or measured without changing the substance

• A property that changes the substance into something new

• A type of chemical reaction

• A mixture of two or more elements

Which of the following is an example of a compound?

• Table salt (NaCl)

• Water (H2O)

• Oxygen gas (O2)

• Gold (Au)

Which statement is true about matter?

• It has both volume and mass

• It is always invisible

• It cannot be measured

• It is only found in solid form