(LEGO) Block Party

The video explores the concept of conservation of mass through playful examples using LEGOs and experiments. It explains how mass is conserved in both physical and chemical changes, using vinegar and cream as a demonstration. The video concludes by reinforcing the idea that matter cannot be created or destroyed, only rearranged.

What does the conservation of mass imply when rearranging LEGO pieces?

• The mass increases when pieces are rearranged.

• The mass decreases when pieces are rearranged.

• The mass remains the same when pieces are rearranged.

• The mass is unpredictable when pieces are rearranged.

During a chemical change, what happens to the particles of the substances involved?

• They remain unchanged.

• They double in number.

• They disappear completely.

• They rearrange to form new substances.

What are the substances called that you start with in a chemical reaction?

• Reactants

• Products

• Inhibitors

• Catalysts

In the vinegar and cream experiment, what is the solid product formed called?

• Foam

• Gas

• Curds

• Liquid

What happens to the mass of products compared to reactants in a chemical reaction?

• The mass of products is unpredictable.

• The mass of products is always less.

• The mass of products is always greater.

• The mass of products equals the mass of reactants.