Question

air ____ bone formed __ two or more ____ molecule

______ solvent:
water ____ all ____ molecules.

property of ______ that
causes water ______
stick / ______ to other
water molecules.

______ tension causes
water ______ to form
\____\ at the ____.

water ______ at a relative
high point, ______ degrees i
______ c.
the ____ creates a ____
between the ______ and
____ system ____
the aquatic ______

when water ______ into a
____ it becomes ____ dens
due to the ______ betwee
the water ______.

look at the ______ of the
water molecules.

Explanation:

This worksheet focuses on properties of water, including molecular structure, surface tension, freezing, and density changes. These concepts are central to Biology (understanding water's role in life) and Chemistry (molecular interactions). Given the diagrams of water molecules and life - related scenarios (aquatic ecosystem), Biology is the most appropriate subfield as it emphasizes water's biological significance.

Answer:

1. For the "molecule formation" part: A molecule is formed when two or more atoms bond. For water, a water molecule ($H_2O$) is formed from two hydrogen atoms and one oxygen atom.
2. Solvent property: Water is a universal solvent as it can dissolve all polar molecules.
3. Cohesion property: Cohesion is the property of water that causes water molecules to stick/cohere to other water molecules.
4. Surface tension: Surface tension causes water molecules to form a "skin" at the surface.
5. Freezing point: Water freezes at a relatively high point, 0 degrees Celsius. The ice creates a barrier between the air and aquatic system, protecting the aquatic organisms.
6. Density change: When water freezes into ice, it becomes less dense due to the spaces between the water molecules.
7. Molecular arrangement: Look at the arrangement of the water molecules (more ordered in ice, less ordered in warm water, and moderately ordered in cold water).