Observing Heating and Cooling - 2nd Grade Science
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What should you do first when observing a material before heating or cooling?
What should you do first when observing a material before heating or cooling?
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Record how it looks and feels before the change. Initial observations provide a baseline for comparison.
Record how it looks and feels before the change. Initial observations provide a baseline for comparison.
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Identify the change: an ice cube is left in a warm room and becomes water.
Identify the change: an ice cube is left in a warm room and becomes water.
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Melting (solid to liquid). Warm air provides heat energy to melt the ice.
Melting (solid to liquid). Warm air provides heat energy to melt the ice.
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Identify the change: a cup of water is placed in a freezer and becomes ice.
Identify the change: a cup of water is placed in a freezer and becomes ice.
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Freezing (liquid to solid). Freezer removes heat energy, turning water solid.
Freezing (liquid to solid). Freezer removes heat energy, turning water solid.
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Which word names a change you can measure, such as hotter or colder?
Which word names a change you can measure, such as hotter or colder?
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Temperature change. Temperature measures how hot or cold something is.
Temperature change. Temperature measures how hot or cold something is.
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What is the best observation tool to tell whether something is hotter or colder?
What is the best observation tool to tell whether something is hotter or colder?
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A thermometer. Measures temperature in degrees to track heat changes.
A thermometer. Measures temperature in degrees to track heat changes.
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Which observation best shows that a material was cooled: water becomes ice or ice becomes water?
Which observation best shows that a material was cooled: water becomes ice or ice becomes water?
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Water becomes ice. Freezing occurs when heat is removed.
Water becomes ice. Freezing occurs when heat is removed.
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Which observation best shows that a material was heated: ice becomes water or water becomes ice?
Which observation best shows that a material was heated: ice becomes water or water becomes ice?
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Ice becomes water. Melting requires adding heat energy.
Ice becomes water. Melting requires adding heat energy.
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Which change is easiest to observe when liquid water is placed in a freezer for a long time?
Which change is easiest to observe when liquid water is placed in a freezer for a long time?
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It freezes into solid ice. Freezer removes heat energy, causing solidification.
It freezes into solid ice. Freezer removes heat energy, causing solidification.
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What is the correct term for making a material colder by removing heat?
What is the correct term for making a material colder by removing heat?
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Cooling. Removing heat energy makes materials colder.
Cooling. Removing heat energy makes materials colder.
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Which observable property is changing when an ice cube turns into a puddle of water?
Which observable property is changing when an ice cube turns into a puddle of water?
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State of matter. Ice (solid) changes to water (liquid).
State of matter. Ice (solid) changes to water (liquid).
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Which observable property is changing when liquid water becomes solid ice in a freezer?
Which observable property is changing when liquid water becomes solid ice in a freezer?
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State of matter. Water (liquid) changes to ice (solid).
State of matter. Water (liquid) changes to ice (solid).
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What is the correct term for making a material warmer by adding heat?
What is the correct term for making a material warmer by adding heat?
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Heating. Adding heat energy makes materials warmer.
Heating. Adding heat energy makes materials warmer.
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Which change of state is shown when a wet shirt dries faster in the sun?
Which change of state is shown when a wet shirt dries faster in the sun?
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Evaporation. Water in the shirt turns to gas in the sun.
Evaporation. Water in the shirt turns to gas in the sun.
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Which change of state is shown when butter becomes soft and runny on a warm pan?
Which change of state is shown when butter becomes soft and runny on a warm pan?
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Melting. Butter changes from solid to liquid when heated.
Melting. Butter changes from solid to liquid when heated.
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Which change of state is shown when a popsicle becomes hard again in a freezer?
Which change of state is shown when a popsicle becomes hard again in a freezer?
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Freezing. Liquid popsicle becomes solid when cooled.
Freezing. Liquid popsicle becomes solid when cooled.
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