Properties of water
- An atom is the smallest unit matter that retains its properties.
- Atoms consist of Protons, Electrons, and Neutrons.
- Protons have a positive charge, while Electrons have a negative, and Neutrons have no charge.
- Water is a polar molecule.
- Hydrogen Bonding is the weak attraction between the weekly negative oxygen atoms of a different molecule.
- Water is a universal solvent.
- Cohesion is when water take the shape of different objects.
- Surface Tension is when water is attracted to itself.
- Adhesion is water molecules attracted to other materials.
- Heat is a measure of total kinetic energy of the atoms and molecules
Water Lab
Evaporate Cooling: station #1 Water and Alcohol
In this lab, i had to put a drop of water and i drop of alcohol on my wrist, separate. To me, the water felt much cooler when i blew on it than the alcohol.
Water Tension/Cohesion- station #2 Water on a Penny
I predicted 30 drops could be placed on the penny before it leaks. But 36 drops were able to put on the penny before the surface tension broke.
Surface Tension: Station #3 Water on Wax Paper
In this lab, we had to drop a drop of water on wax paper, unlike a regular paper, the water didn't bleed into the paper. Instead it stood on the paper due to surface tension.
Surface Tension Station #4- Paper Clips on the Surface of a cup water
In this station, i think it was the most difficult. I was sure i could make a paper clip float on the water. Honestly, it sounds easy. But i wasn't careful enough. I kept breaking the surface tension and the paper clips kept falling. Unsuccessful.
Adhesion: Station #5- Graduated Cylinder
By adhesion, the water couldn't make a straight line across the glass container, the line wasn't straight because the water sticks to the glass.
Capillary Action- Station #6- Rolled up Paper Towel
I thought this station was interesting because i didn't think the water will travel through the paper and into the other cup. This happened due to Capillary action. Capillary action happens because water is sticky. water molecules stick to each other and to other substances, such as glass, cloth, organic tissues, and soil. Thats why its important to us because plants put down roots into the soil which are capable of carrying water from the soil up into the plant.
Evaporate Cooling: station #1 Water and Alcohol
In this lab, i had to put a drop of water and i drop of alcohol on my wrist, separate. To me, the water felt much cooler when i blew on it than the alcohol.
Water Tension/Cohesion- station #2 Water on a Penny
I predicted 30 drops could be placed on the penny before it leaks. But 36 drops were able to put on the penny before the surface tension broke.
Surface Tension: Station #3 Water on Wax Paper
In this lab, we had to drop a drop of water on wax paper, unlike a regular paper, the water didn't bleed into the paper. Instead it stood on the paper due to surface tension.
Surface Tension Station #4- Paper Clips on the Surface of a cup water
In this station, i think it was the most difficult. I was sure i could make a paper clip float on the water. Honestly, it sounds easy. But i wasn't careful enough. I kept breaking the surface tension and the paper clips kept falling. Unsuccessful.
Adhesion: Station #5- Graduated Cylinder
By adhesion, the water couldn't make a straight line across the glass container, the line wasn't straight because the water sticks to the glass.
Capillary Action- Station #6- Rolled up Paper Towel
I thought this station was interesting because i didn't think the water will travel through the paper and into the other cup. This happened due to Capillary action. Capillary action happens because water is sticky. water molecules stick to each other and to other substances, such as glass, cloth, organic tissues, and soil. Thats why its important to us because plants put down roots into the soil which are capable of carrying water from the soil up into the plant.