Question

question 1
the article primarily discusses __________.
a. how some insects can walk on water because of surface tension
b. how ice floats in liquid water because of a difference in density
c. how all water molecules are made up of both hydrogen and oxygen atoms
d. how some properties of water are determined by the shape of the molecule

Explanation:

To determine the answer, we analyze each option:

• Option A: Discusses insects walking on water due to surface tension, which is a specific property application, not the primary focus of a general article on water's properties.
• Option B: Explains ice floating due to density difference, another specific property application.
• Option C: States the composition of water molecules (H and O), which is basic chemistry but not about how properties are determined by molecular shape.
• Option D: Addresses how water's properties are determined by molecular shape, which is a more overarching and primary topic related to the structure - property relationship of water.

Answer:

D. how some properties of water are determined by the shape of the molecule