Unit 3 Lessons 1 & 2 Review

Front

Why does ice float?

Back

As water freezes, it expands and its density decreases.

Front

What is capillary action?

Back

The ability of a liquid to flow against gravity.

Front

Why does water move from the roots to the leaves of plants?

Back

Capillary action pulls the water molecules like a chain.

Front

What are ions?

Back

Atoms or molecules that have gained or lost electrons, resulting in a net electrical charge.

Front

What is a chemical change?

Back

A change that alters the chemical composition of a substance.

Front

What is density?

Back

Density is the mass of a substance divided by its volume.

Front

What is cohesion in water?

Back

Cohesion is the attraction between water molecules due to hydrogen bonding.

Front

What is adhesion in water?

Back

Adhesion is the attraction between water molecules and other substances.

Front

What is the significance of water's high specific heat?

Back

It allows water to absorb and release heat without significant temperature changes, stabilizing climates.

Front

What is the role of water in photosynthesis?

Back

Water is a reactant that provides electrons and protons for the synthesis of glucose.