ACS Resources: 10 results
Cool It and Pool It  
In this activity, students compare a cup of water at room temperature to a cup of ice. The cup of ice becomes wet on the outside as water in the air condenses on its surface.
Phases / Phase Transitions / Diagrams
Frosty the Snowcan  
In this activity, the water vapor in the air condenses on the outside of the cold can. This makes the water vapor change state from a gas to a liquid. But, if the can is very cold, some of the water changes state from a liquid to a solid (ice). ,
Phases / Phase Transitions / Diagrams
Lose Some Mass ? It?s a Gas  
A liquid can change its state to a gas by evaporation. When a liquid evaporates, some of the liquid goes up into the air and becomes a gas. Some liquids evaporate faster than others. In this activity, students see which liquid leaves its state the fastest! ,
Phases / Phase Transitions / Diagrams
The Nose Knows  
In 'The Nose Knows' students learn about what causes the odors in perfumes and foods. Small molecules are given off by these substances and are detected by our noses as odors. This activity investigates some of the conditions required to produce odors.
Phases / Phase Transitions / Diagrams
Warm It up  
In this activity, students fill one glass with cold water and one with hot water. The observe the hot water evaporating first, as evidenced by vapor collecting on the rim of the glass.
Phases / Phase Transitions / Diagrams
A Condensation Sensation  
Students investigate condensation. When ice is added to air containing water vapor, the vapor condenses more rapidly than at room temperature. When water exists as a gas (water vapor) the molecules are very far apart. But when water vapor or any gas is cooled, the molecules slow down and do not move so far apart from each other. As a gas is cooled, and the molecules move closer together, they can change back into a liquid. This process is called condensation. Decreasing the temperature increases the rate of condensation.
Phases / Phase Transitions / Diagrams |
A State Debate  
It?s not always so easy to say definitely that a substance is a solid, liquid, or gas. Some materials, like cornstarch mixed with ,water, can act more like a solid when treated a certain way and more like a liquid when treated a different way. Shaving ,cream seems to have an unusual state because it is a liquid soap with a lot of gas bubbles mixed in it. The gas makes it so ,thick and frothy that it keeps its shape and supports light objects like a solid. When you let the liquid from shaving cream evaporate, all that's left is the very light and thin solid. In this activity, students explore some characteristics of solids, liquids and gases.
Phases / Phase Transitions / Diagrams |
Colloids |
Physical Properties
Ice: The Hard Facts  
When water freezes, the water molecules arrange themselves in a special way to form ice crystals. The crystals repeat ,themselves over and over again to form a nice hard piece of ice. In this investigation, students explore what happens to its freezing when water has salt or sugar dissolved in it. , ,
Phases / Phase Transitions / Diagrams |
Solutions / Solvents
States of Matter  
A collection of activities that explore basic concepts dealing with states of matter. They are written for the 4-6th grade level.
Phases / Phase Transitions / Diagrams |
Solids |
Liquids |
Evaporation Exploration  
Fabrics like cotton can soak up sweat and water, and they dry slowly. So as a person sweats, cotton clothes can become wet and sticky, even heavy?they hold on to the water they soak up. New high-tech fabrics in modern sports clothing are different. They have the ability to pull moisture away from the skin and carry it to the outer surface of the clothing, where it can evaporate more easily and cool you off. In the following activity, students compare the rate of evaporation of water from cotton and a paper towel, which will act like a high-tech fabric.
Applications of Chemistry |
Consumer Chemistry |
Phases / Phase Transitions / Diagrams |
Noncovalent Interactions