LS-2.1-How Matter Can Change

When sugar dissolves in water, it is considered:

• A chemical change

• A physical change

• Both chemical and physical change

• Neither chemical nor physical change

What is the purpose of coefficients in chemical equations?

• To show the charge of ions

• To indicate the state of matter

• To show the number of atoms or molecules

• To represent activation energy

What happens to atoms during a chemical reaction?

• They are destroyed

• They are created

• They are rearranged.

What are substances that participate in a chemical reaction called?

• Products

• Reactant

• Catalysts

When cookie dough is baked in an oven, what type of change occurs?

• Chemical change only

• Physical change only

• Both chemical and physical changes

• Neither chemical nor physical changes

Which of the following is NOT a physical change?

• Breaking a clay ball into pieces

• Reshaping clay into a bowl

• Baking clay in a kiln

• Flattening clay with a rolling pin

Which of the following is an example of a constraint in designing a cookie-baking experiment?

• The type of cookie being baked

• The maximum temperature of the available oven

• The favorite flavor of the experimenter

• The brand of flour used

When clay is shaped into a bowl, which of the following is true?

• A chemical change has occurred

• A new substance has been created

• The chemical composition of the clay has changed

• The physical properties of the clay have been altered without creating a new substance

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

• Melting butter

• Mixing flour and sugar

• Caramelization of sugar

• Cutting a cookie into pieces

What is a change in the color of the substance an example of?

• Baking clay in a kiln

• The sugar molecules are evenly distributed among the water molecules

• A change in the color of the substance

• The maximum temperature of the available oven.