Flashcardziz - QA2 PES & MM (units 1 and 2) 24-25

Front

What happens to the weight of water when it freezes?

Back

The weight of the water remains the same.

Front

How can you prove that the number of water particles remains the same when water freezes?

Back

By measuring the mass of the water using a scale.

Front

Why do oil and vinegar separate when stirred together?

Back

They separate because their molecules are not attracted to each other.

Front

What happens when egg is stirred into oil and vinegar?

Back

They combine together because they both attract to the egg molecules.

Front

Why is baking soda soluble in water?

Back

The baking soda molecules are attracted to the water molecules.

Front

Why is pepper not soluble in water?

Back

The pepper molecules are not attracted to the water molecules.

Front

What is the movement of Earth from March 20 to August 20?

Back

Earth makes half a revolution around the Sun.

Front

What is the definition of solubility?

Back

Solubility is the ability of a substance to dissolve in a solvent.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is a molecule?

Back

A molecule is a group of atoms bonded together.