Mix it Up!

Dr. Forrester introduces mixtures, explaining that they maintain individual properties and can be separated. He contrasts mixtures with chemical reactions, using baking soda and vinegar to demonstrate a reaction. Physical changes are discussed, highlighting that they don't alter the substance's properties. The video concludes with a review and advice on conducting scientific experiments.

What is a key characteristic of a mixture?

• The substances cannot be separated.

• The substances maintain their individual properties.

• The substances form a new compound.

• The substances lose their original properties.

Which method can be used to separate salt from pebbles?

• Heating the mixture

• Filtering through netting

• Using a magnet

• Dissolving in water

What happens when baking soda is mixed with vinegar?

• The substances remain unchanged.

• A chemical reaction occurs.

• A physical change occurs.

• Nothing happens.

What is a sign that a chemical reaction has occurred?

• The color of the mixture changes.

• The substances separate easily.

• Bubbles form in the solution.

• The mixture becomes colder.

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

• Burning wood

• Melting ice

• Baking a cake

• Rusting iron

What remains unchanged in a physical change?

• The temperature of the substance

• The chemical properties of the substance

• The state of the substance

• The appearance of the substance

What should be included in a scientific investigation?

• An experiment without procedures

• A conclusion and no data

• A question and detailed documentation

• A hypothesis and random observations