Chemical Changes Evidence

What is a chemical reaction?

• A process in which nothing happens to the substances

• A process in which one or more substances are converted into different substances with different properties.

• A process in which substances remain the same

• A process in which substances are destroyed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What are some evidence of a new substance being formed during a chemical reaction?

• Change in temperature

• Production of gas, change in color, release of heat or light, formation of a precipitate

• Change in volume

• Change in pressure

Tags

NGSS.MS-PS1-2

Explain the formation of precipitate as evidence of a chemical change.

• The formation of a precipitate is evidence of a chemical change.

• The formation of a liquid is evidence of a physical change.

• The formation of a solid is evidence of a physical change.

• The formation of a gas is evidence of a chemical change.

Tags

NGSS.MS-PS1-2

How does a color change indicate a chemical change?

• The color change indicates a change in the chemical composition of the substance.

• The color change indicates a change in temperature

• The color change is just a coincidence

• The color change is caused by the lighting in the room

Tags

NGSS.MS-PS1-2

Describe the production of gas as evidence of a chemical change.

• The production of light is evidence of a chemical change.

• The production of gas is evidence of a chemical change.

• The production of heat is evidence of a chemical change.

• The production of sound is evidence of a chemical change.

Tags

NGSS.MS-PS1-2

How can the release or absorption of energy be used as evidence of a chemical change?

• The release or absorption of energy can be observed as a change in color

• The release or absorption of energy can be observed as a change in temperature, light, or sound.

• The release or absorption of energy can be observed as a change in mass

• The release or absorption of energy can be observed as a change in volume

Tags

NGSS.MS-PS1-4

Give an example of a chemical reaction and explain the evidence of a new substance being formed.

• Boiling water and forming steam

• Mixing sugar and water

• Iron rusting and forming iron oxide

• Burning wood and forming ash

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What are some common examples of color changes in chemical reactions?

• Formation of a precipitate, change in pH, formation of a gas

• Change in temperature, change in texture, change in volume

Tags

NGSS.MS-PS1-2

Explain the role of catalysts in chemical reactions and how they affect the evidence of a new substance.

• Catalysts change the color of the substances involved in the reaction but do not affect the speed.

• Catalysts have no effect on chemical reactions and do not create new substances.

• Catalysts slow down chemical reactions by increasing the activation energy.

• Catalysts speed up chemical reactions by lowering the activation energy.

Tags

NGSS.HS-PS1-5

Discuss the importance of understanding evidence of chemical changes in everyday life.

• Understanding evidence of chemical changes is only important for scientists

• It has no impact on our daily lives

• Chemical changes are not relevant to everyday activities

• It helps us make informed decisions about products, cooking, cleaning, and safety.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-4