Cambios químicos: video de evaluación

The video tutorial guides students through completing sentences related to matter and chemical changes. It covers the composition of matter, the nature of chemical and physical changes, and how to identify chemical changes through observable indicators.

What is matter primarily composed of?

• Compounds

• Atoms

• Molecules

• Cells

During a chemical change, what happens to a substance?

• It melts

• It remains the same

• It becomes a different substance

• It evaporates

Which of the following is NOT a sign of a chemical change?

• Change in shape

• Formation of a gas

• Temperature change

• Color change

How can you tell a chemical change is occurring?

• The substance dissolves

• The substance becomes colder

• The substance remains the same

• The substance changes color

What is a common indicator that a chemical reaction is taking place?

• The substance becomes solid

• The substance changes state

• The substance produces a gas

• The substance emits light