Objective: Children will perform an experiment to determine which substance will work best to melt ice.‹ Return to Theme
Note: This is a two-part lesson to be conducted over 2 days.
The word water usually refers to water in its liquid state. Water in its solid state is frozen and is more commonly known as ice. Water can also be a gas in the form of steam or water vapor. Water freezes at temperatures below 32 degrees Fahrenheit. Ice begins to melt when the temperature around it begins to rise above 32 degrees Fahrenheit. Unlike most substances, water expands when it freezes. This is why an ice cube will take up more space than it did as the liquid water it was made from.
In winter, many regions experience very cold temperatures. Any water on surfaces such as roads and sidewalks will freeze and become hazardous to drive or walk on. In some of these regions, salt is frequently used to help melt the ice. When salt is added to a block of ice, the area of ice immediately surrounding the grain of salt begins to melt. The melting process spreads out from that point. This is because salt lowers the freezing point of water.
These lessons are aligned with the Common Core State Standards ("CCSS"). The CCSS provide a consistent, clear understanding of the concepts and skills children are expected to learn and guide teachers to provide their students with opportunities to gain these important skills and foundational knowledge.
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There are currently no Common Core Standards for pre-k, but these lessons are aligned as closely as possible to capture the requirements and meet the goals of Common Core Standards. However, these lessons were neither reviewed or approved by the National Governors Association Center for Best Practices or the Council of Chief State School Officers, which together are the owners and developers of the Common Core State Standards.