Exploring Physical and Chemical Changes

The video tutorial explains the differences between physical and chemical changes. It begins by introducing atoms and molecules, which make up all matter. Physical changes involve rearranging molecules without altering their properties, while chemical changes result in new substances with different properties due to the rearrangement of atoms. The video also defines reactants and products in the context of chemical reactions.

What are the basic building blocks of matter?

• Compounds

• Molecules

• Atoms

• Cells

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What happens to molecules during a physical change?

• They change color

• They form new substances

• They are rearranged

• They are destroyed

In a physical change, what remains the same?

• The appearance of the substance

• The properties of the substance

• The number of atoms

• The temperature

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

• Baking a cake

• Melting ice

• Rusting iron

• Burning wood

What is formed during a chemical change?

• New elements

• New atoms

• New compounds

• New molecules

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What is the term for the original substance in a chemical change?

• Solvent

• Reactant

• Product

• Catalyst

What do we call the new substance formed in a chemical change?

• Reactant

• Solvent

• Product

• Catalyst

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NGSS.MS-PS1-2

What is a key difference between physical and chemical changes?

• Physical changes do not alter the properties of the substance

• Chemical changes do not form new substances

• Chemical changes do not involve atoms

• Physical changes form new substances

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NGSS.MS-PS1-1

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

• Digesting food

• Freezing water

• Dissolving sugar in water

• Boiling water

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NGSS.MS-PS1-2

What happens to the properties of a substance during a chemical change?

• They become reversible

• They disappear

• They change

• They remain the same

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