ACS: Inquiry in Action - Heating and Cooling (Lesson 5.2): Heating Can Make a Change That Cannot Go Back Again
Students design and conduct an experiment to see if baking powder causes more bubbling in warm or cold water to investigate the question: Does baking powder produce more bubbles when it is heated or cooled?
Objective
Students will be able to explain that when some substances are heated to a certain extent, they change in a way that they cannot be changed back by cooling them.
Key Concepts
- Heating can make a substance change.
- Heating can make some substances change in a way that they cannot be changed back again by cooling.
NGSS Alignment
- NGSS 2-PS1-4: Construct an argument with evidence that some changes caused by heating and cooling can be reversed and some cannot.
Summary
In the previous lesson, students saw that some substances that change when heated can be changed back again when cooled.
- Students see a time lapse video of cookie dough being baked into cookies.
- Students participate in a class discussion about heating causing changes that cannot be reversed when cooled.
- Students learn that heating baking powder in the cookie dough makes a gas and causes the little holes in the cookie.
- Students design and conduct an experiment to see if baking powder causes more bubbling when it is warm or cold.
Evaluation
Download the student activity sheet and distribute one per student when specified in the activity. The activity sheet will serve as the Evaluate component of the 5-E lesson plan.
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Students plan and conduct an absorbency test on paper, plastic, aluminum foil, and felt to investigate the question: Which material absorbs water and why?
Students sort common objects according to characteristics such as shape, flexibility, and the material they are made from to investigate the question: Can you group objects based on their characteristics?
Students conduct a series of tests on different materials to learn about their properties to investigate the question: What are some of the characteristic properties of paper, plastic, and aluminum foil?
Students use what they’ve learned about the properties of paper, plastic, and aluminum foil to investigate the question: Which materials are best for making a boat that can hold the most pennies before sinking?
Students develop a test to compare the dissolving of an M&M and a Skittle in water to investigate the question: Do M&Ms and Skittles dissolve by the same amount?
Students place small common objects made from wax, wood, metal, and rubber in water to investigate the question: Do certain materials tend to float or sink in water?
Students warm butter until it melts and then cool it until it turns hard again as they investigate the question: How do substances change when they are warmed and cooled?
Students do simple tests to observe the properties of water, mineral oil, and corn syrup on the surface of a zip-closing plastic bag to investigate the question: Can liquids that look similar have different properties?
After an introduction of Snap Cubes as models atoms and molecules, students use Snap Cubes to investigate the question: How can Snap Cubes be used to make models of different molecules?
Student groups use four or five Snap Cubes to make as many different objects as possible to investigate the question: How many different objects can be made by rearranging four cubes?
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Students design and conduct an experiment to see if baking powder causes more bubbling in warm or cold water to investigate the question: Does baking powder produce more bubbles when it is heated or cooled?
Objective
Students will be able to explain that when some substances are heated to a certain extent, they change in a way that they cannot be changed back by cooling them.
Key Concepts
- Heating can make a substance change.
- Heating can make some substances change in a way that they cannot be changed back again by cooling.
NGSS Alignment
- NGSS 2-PS1-4: Construct an argument with evidence that some changes caused by heating and cooling can be reversed and some cannot.
Summary
In the previous lesson, students saw that some substances that change when heated can be changed back again when cooled.
- Students see a time lapse video of cookie dough being baked into cookies.
- Students participate in a class discussion about heating causing changes that cannot be reversed when cooled.
- Students learn that heating baking powder in the cookie dough makes a gas and causes the little holes in the cookie.
- Students design and conduct an experiment to see if baking powder causes more bubbling when it is warm or cold.
Evaluation
Download the student activity sheet and distribute one per student when specified in the activity. The activity sheet will serve as the Evaluate component of the 5-E lesson plan.
Back to 2nd Grade lessons
Guided instructions, lesson plans, classroom activities, video demonstrations, and activity books.
Students plan and conduct an absorbency test on paper, plastic, aluminum foil, and felt to investigate the question: Which material absorbs water and why?
Students sort common objects according to characteristics such as shape, flexibility, and the material they are made from to investigate the question: Can you group objects based on their characteristics?
Students conduct a series of tests on different materials to learn about their properties to investigate the question: What are some of the characteristic properties of paper, plastic, and aluminum foil?
Students use what they’ve learned about the properties of paper, plastic, and aluminum foil to investigate the question: Which materials are best for making a boat that can hold the most pennies before sinking?
Students develop a test to compare the dissolving of an M&M and a Skittle in water to investigate the question: Do M&Ms and Skittles dissolve by the same amount?
Students place small common objects made from wax, wood, metal, and rubber in water to investigate the question: Do certain materials tend to float or sink in water?
Students warm butter until it melts and then cool it until it turns hard again as they investigate the question: How do substances change when they are warmed and cooled?
Students do simple tests to observe the properties of water, mineral oil, and corn syrup on the surface of a zip-closing plastic bag to investigate the question: Can liquids that look similar have different properties?
After an introduction of Snap Cubes as models atoms and molecules, students use Snap Cubes to investigate the question: How can Snap Cubes be used to make models of different molecules?
Student groups use four or five Snap Cubes to make as many different objects as possible to investigate the question: How many different objects can be made by rearranging four cubes?
What are you looking for?
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