Unit 5 Water Review

Front

What property of water allows some liquid water to remain in frozen lakes?

Back

Water is less dense as a solid than as a liquid.

Front

What property of water allows it to dissolve many different substances?

Back

It is a polar molecule.

Front

In an experiment, if the amount of water (mL) is kept the same, is it a variable or constant?

Back

Constant.

Front

What must be done with thermal energy to change the state of water from container A to container B?

Back

Add.

Front

In an experiment, if the amount of sugar dissolved (g) can change, is it a variable or constant?

Back

Variable.

Front

What is the definition of a polar molecule?

Back

A molecule with a partial positive charge on one side and a partial negative charge on the other, allowing it to interact with other polar substances.

Front

Why is water known as the universal solvent?

Back

Because it can dissolve more substances than any other liquid.

Front

What is density?

Back

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

Front

What happens to the density of water when it freezes?

Back

It decreases, which is why ice floats on water.

Front

What is thermal energy?

Back

The energy that comes from the temperature of matter; it is the total energy of all the particles in an object.