Cohesion, Adhesion, Surface Tension

How does the concept of adhesion explain why water spreads on a surface?

• Adhesion causes water molecules to be repelled from the surface, preventing them from spreading out.

• Adhesion causes water molecules to be attracted to the surface, allowing them to spread out.

• Adhesion has no effect on water's behavior on surfaces.

• Adhesion causes water to evaporate quickly on surfaces.

What is the gaseous form of water called?

• Water vapor

• Liquid water

• Ice

• Steam

What is an example of adhesion?

• Water droplets sticking to a leaf.

• Oil spreading on water.

• Sugar dissolving in tea.

• Ice melting on a warm surface.

What role does cohesion play in water transport in plants?

• Cohesion allows water molecules to evaporate quickly from the leaves.

• Cohesion helps water molecules stick together, allowing them to move up through the plant's xylem.

• Cohesion prevents water from entering the roots of the plant.

• Cohesion helps in the absorption of nutrients from the soil.

What is an example of cohesion?

• Water forming droplets on a smooth surface.

• Oil mixing with water.

• Sugar dissolving in water.

• Salt forming crystals in a solution.

Why is water considered a polar molecule?

• Because it has equal sharing of electrons between hydrogen and oxygen.

• Because it has a partial positive charge on one side (hydrogens) and a partial negative charge on the other side (oxygen).

• Because it is a non-polar substance that dissolves in polar solvents.

• Because it has a symmetrical shape that cancels out charges.

What is cohesion?

• Cohesion is the attraction between water molecules, causing them to stick together.

• Cohesion is the process of water evaporating from a surface.

• Cohesion refers to the ability of water to dissolve other substances.

• Cohesion is the force that causes water to rise in plants.

What is adhesion?

• The attraction between water molecules and other substances.

• The process of water evaporating into the air.

• The ability of water to dissolve salts and minerals.

• The force that causes water to freeze at 0 degrees Celsius.

What is capillary action?

• The ability of water to flow in narrow spaces without external forces, due to adhesion and cohesion.

• The process of water evaporating from a surface.

• The movement of water through soil due to gravity.

• The ability of water to freeze at higher temperatures.

How does surface tension affect small objects?

• Small objects can float on water if they do not break the surface tension.

• Surface tension has no effect on small objects.

• Small objects sink immediately in water due to surface tension.

• Surface tension only affects large objects, not small ones.