1. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: If there only about 100 types of elements in the world, why are there so many different kinds of matter?

2. Elements can combine in many different ways to form many different types of matter.

3. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: Describe the difference between a mixture and a compound.

4. Compounds are chemically combined, mixtures are not.

5. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: Define: Solute Solvent Solution

6. Solution – homogeneous mixture where a solute is dissolved in a solvent Solute – the matter that gets dissolved Solvent – the matter that does the dissolving

7. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 This screen will disappear in 3 minutes. Seconds Remaining. Which kind of mixture is sometimes difficult to distinguish from a compound? Why?

8. Homogeneous mixtures because the mixtures are the same throughout

9. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Remaining: Define the terms: Element Mixture Compound Molecule

10. ELEMENT – matter made of only one type of atom; a pure substance MIXTURE – a combination of different types of matter in no fixed proportion; can be physically taken apart COMPOUND – a combination of different types of matter in specific proportions; must be chemically taken apart MOLECULE – the smallest part of a compound that has all the properties of that compound