QuestionMay 3, 2025

What do these two changes have in common? filtering air to remove dust and pollen your breath becoming visible on a cold day Select all that apply. Both are only physical changes. Both are chemical changes. Both are caused by cooling. Both are changes of state.

What do these two changes have in common? filtering air to remove dust and pollen your breath becoming visible on a cold day Select all that apply. Both are only physical changes. Both are chemical changes. Both are caused by cooling. Both are changes of state.
What do these two changes have in common? filtering air to remove dust and pollen your breath becoming visible on a cold day Select all that apply. Both are only physical changes. Both are chemical changes. Both are caused by cooling. Both are changes of state.

Solution
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Answer

Both are only physical changes. Explanation 1. Identify the nature of changes Filtering air to remove dust and pollen is a physical change as it involves separating particles without altering their chemical structure. Your breath becoming visible on a cold day is also a physical change, as it involves water vapor condensing into tiny droplets. 2. Determine if changes are caused by cooling Filtering air does not involve cooling; it's a separation process. However, your breath becoming visible is due to cooling, as warm moisture from your breath condenses in cold air. 3. Assess if changes involve a change of state Filtering air does not involve a change of state; it separates solid particles from gas. Your breath becoming visible involves a change of state from gas (water vapor) to liquid (droplets).

Explanation

1. Identify the nature of changes<br /> Filtering air to remove dust and pollen is a physical change as it involves separating particles without altering their chemical structure. Your breath becoming visible on a cold day is also a physical change, as it involves water vapor condensing into tiny droplets.<br /><br />2. Determine if changes are caused by cooling<br /> Filtering air does not involve cooling; it's a separation process. However, your breath becoming visible is due to cooling, as warm moisture from your breath condenses in cold air.<br /><br />3. Assess if changes involve a change of state<br /> Filtering air does not involve a change of state; it separates solid particles from gas. Your breath becoming visible involves a change of state from gas (water vapor) to liquid (droplets).
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