January, 19, 2021 Grade 5
Which properties are affected by temperature?
When materials scientists develop new materials, they must consider how temperature affects the properties of a material. Which properties are affected by temperature?
Objectives: Students will manipulate the materials to determine if a physical change takes place.
Materials: aluminum foil, a piece of thin rubber, sugar cubes, water, plastic cups, a spoon, a large dish of ice water, a large dish of warm water.
Procedure:
You need to test Solubility Shininess Flexibility
1. Take a piece of aluminum foil, a piece of thin rubber, a spoon of sugar (or sugar cube)
2. Add ICE water to three plastic cups. Add sugar to the first cup, do not stir. Add aluminum foil to the second cup, and a piece of rubber to the third cup. Let the objects stand in the water for 5 minutes.
3. Observe the sugar in the cup. (solubility)
4. Pour off water from the aluminum foil. Record your observations on how shiny the foil appears
5. Pour off the water from the rubber. Stretch the rubber. Record observations (is it flexible)
6. Use a new sugar cube (or a teaspoon of sugar), aluminum foil, and a piece of rubber. Repeat steps 3-5 with a cup of WARM or HOT water.
The rubber didn't dissolve in hot or cold water.
In hot water, the foil shrank in size but didn't dissolve.
| Sugar | Aluminum foil | Rubber |
Property tested | Solubility | Shininess | flexibility |
Observations | Sugar dissolved faster in hot water | The aluminum foil remained Equally shiny in both cold and hot water | The rubber did stretch well in hot water |
I observed that the sugar in hot water dissolved faster than in cold water.
rubber band shrink became shorter in hot or warm water .in cold water expanded.
aluminum foil not affected it shininess in cold or hot water
No comments:
Post a Comment