True/False: Chemical changes are usually easy to reverse.

Which of the following characteristics is shared by all chemical reactions?

Chemical or Physical change?

most of the properties before and after are the same.

Chemical or Physical change?

Most of the properties before and after are the different.

Chemical or Physical change?

Breaking an egg

Chemical or Physical change?

Shattering a vase.

True/False: When a substance undergoes a physical change a new substance is produced.

True/False: When a substance undergoes a physical change the particles moves to new positions, speed up or slow down.

True/False: When a substance undergoes a physical change the particles can change speed but not position.

Which term matches the following definition?

Definition: a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition (make up), resulting in the formation of at least one new substance.

Which term matches the following definition?

Definition: a usually reversible change in the physical properties of a substance, as size or shape. This change does not result in a change chemical properties or composition (make up), as it is the same substance before and after the change.

Which term matches the following definition?

Definition: a characteristics of chemicals that are not associated with a change in it's chemical composition. Example include size, shape, colour, density, mass, volume, length and lustre. An example of this for iron is it is silver, shiny and dense.

Which term matches the following definition?

Definition: a characteristics of chemicals that are associated with a change in it's chemical composition (make up). Example include flammability and reactivity. An example of this for Iron is it combines with oxygen in the presence of water to form rust (iron oxide).