6th Grade 6.5C Evidence of Chemical Change

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

Front

What are some signs of a chemical change?

Back

Signs of a chemical change include fizzing, foaming, color change, temperature change, and the production of gas or solid.

Front

What happens when baking soda is mixed with vinegar?

Back

When baking soda is mixed with vinegar, a chemical reaction occurs that produces carbon dioxide gas, resulting in fizzing and bubbling.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water, where the substance remains the same.

Front

What indicates that a chemical change has occurred in a solution?

Back

An increase in temperature and an unexpected color change indicate that a chemical change has occurred.

Front

What is the result of heating lemon juice on paper?

Back

Heating lemon juice on paper causes a chemical change, turning the juice brown and making it visible.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change alters the form or appearance without changing the substance.

Front

What is an example of a gas produced in a chemical reaction?

Back

Carbon dioxide gas produced when vinegar reacts with baking soda is an example of a gas from a chemical reaction.

Front

What does it mean if a substance is described as 'reactive'?

Back

A reactive substance readily undergoes chemical changes when it comes into contact with other substances.

Front

What is the role of temperature in chemical reactions?

Back

Temperature can affect the rate of chemical reactions; higher temperatures often increase reaction rates.