Standards with the same topic and subject but for other grades
classify solids based on their ability to dissolve in water (3.3 b)
Substances dissolve faster in hot water than cold water because hot water has more energy than cold water. When water is heated, the molecules gain energy and, thus, move faster. As the molecules move faster, they make contact with the sugar more often, causing it to dissolve faster (3.3 b).
Dissolving is when a substance is distributed evenly throughout another substance. The substance being dissolved breaks down into smaller pieces that cannot be seen (3.3 a).
plan and conduct an investigation to identify liquid materials that will mix with water (3.3 a)
Some solids will dissolve in water while others will not (3.3 a).
Sometimes when two or more substances are combined, they do not lose their identifying characteristics. These substances are called mixtures. Examples of mixtures include soil, concrete, and a mud puddle (5.7 b).
plan and conduct an investigation to determine solids that will dissolve in water (3.3 a)
The student will investigate and understand how materials interact with water. Key ideas include a) solids and liquids mix with water in different ways; and b) many solids dissolve more easily in hot water than in cold water.
classify liquids by their ability to mix with water (3.3 a)
plan and conduct an investigation to determine the effect of water temperature on the dissolving of a solid (3.3 b).