Question

what property of water cause water to form a curved shape on the penny?
water’s density
water’s polarity
water’s melting point
waterss heat capacity
question 8
solid ice is more dense than liquid water.
true
false

Explanation:

First Question (About Water's Curved Shape on Penny)

To determine the property of water causing a curved shape (meniscus) on a penny, we analyze each option:

• Water’s density: Relates to mass/volume, not surface curvature. Eliminate.
• Water’s polarity: Leads to cohesion (water molecules attracting each other) and surface tension, which causes the curved shape (meniscus) due to intermolecular forces. This fits.
• Water’s melting point: Temperature at which water freezes, irrelevant to surface shape. Eliminate.
• Water’s heat capacity: Relates to heat absorption, not surface curvature. Eliminate.

The density of solid ice is less than that of liquid water. This is because the hydrogen bonding in ice forms a hexagonal lattice structure with more space between molecules, making ice less dense (it floats on water). So the statement "Solid ice is more dense than liquid water" is false.

Answer:

B. water's polarity

Second Question (Solid Ice vs Liquid Water Density)