Properties of Water

What two elements make up water?

• helium and oxygen

• helium and carbon

• hydrogen and oxygen

• oxygen and carbon

Why does ice float?

• As water freezes, it expands and its density decreases.

• As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.

• As water freezes, air becomes trapped between the hydrogen bonds of water molecules.

• As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

Water is a universal solvent because it...

• It can be found anywhere

• It freezes when it gets cold

• floats when frozen

• Dissolves most substances

Chemical weathering is when

• Water freezes, expands and breaks the rock

• Soil is exposed to chemicals

• Rocks change due to exposure of acid rain

• Tectonic plates move the earth's crust

Physical weathering is when

• Water freezes, expands and breaks the rock

• Tectonic plates move the earth's crust

• Rocks change due to exposure of acid rain

• Soil is exposed to chemicals

What is the water cycle?

• the 3 forms of water

• the movement of water on, above, or below the surface of the Earth

• when clouds form

• when water melts

What is the energy source for the water cycle?

• the sun

• the earth

• the moon

• water

What part of the water cycle does this picture show?

• condensation

• precipitation

• evapaoration

Describe cohesion

• Water molecules attracted to other substances.

• Water molecules climbing upwards against the force of gravity.

• Water molecules dissolving many substances

• Water molecules attracted to other water molecules.

1. Surface tension is the property of water in which...

• water spills easily.

• water tends to be see-through.

• water molecules at the surface tend to stick together.

• water flows in a downward direction