IQWST Science 7 lesson one and two quiz.

What are the two fundamental properties of all matter?

Mass and volume

What is matter made of?

Atoms

Can characteristic properties be used to identify substances?

Yes, this is a scientific principle.

How do characteristic properties behave during physical changes?

They do not change, this is scientific principle

What defines a pure substance?

A pure substance is made of only one type of particle. A pure substance can be either an element or a compound, elements are made of one type of atom while compounds are made of one type of molecule. (Scientific Principle)

What is the difference between elements and compounds?

Elements are made of only one type of atom, while compounds are made of only one type of molecule.

What is a solution?

A special type of mixture where a solute dissolves in a solvent.

What is the role of the solute in a solution?

The solute is what dissolves in the solvent.

What is the role of the solvent in a solution?

The solvent is what the solute dissolves in.

In which liquids does fat and soap dissolve?

Fat dissolves in oil, but not water; soap dissolves in water, but not oil.

Scientific principle: What is solubility?

Solubility is a substance's ability to dissolve in an another substance (usually a liquid) and is a characteristic property.

What must be described when discussing solubility?

One must describe what (usually solid) substance is soluble in what (usually liquid) substance.

Does melting point change with physical change?

No, it is a characteristic property.

What is the universal solvent?

Water (H2O), it is called this because it is able to dissolve more substances than any other liquid.