Name: ______________________________ Date: ______________ Hr: _________

Assignments

CLASSIFYING MATTER WEBQUEST

PART A: Classifying Matter as either a Pure Substance or Mixture

Pure Substances Mixtures

Definition

Contains only _____ element or

____________; it is very

_________________ to get pure

substances

Anything made by combing ______ or more

____________ things

Examples

PART B: Comparing Compounds and Mixtures

1. Draw a model of a single atom of iron.

2. Draw a model of one oxygen molecule.

3. What happens when heat is applied to molecules of oxygen and molecules of hydrogen?

4. Draw a model of one water molecule.

5. Fill in the blanks:

a. Atoms _____________ together are known as _____________________.

b. Atoms of the ____________ element can join to form molecules.

c. Compounds are _____ or _______ atoms of different elements ______________________

bonded together.

d. Compounds can have __________________ properties than the elements that make them.

e. Mixtures are elements or compounds that are not ________________ joined.

Name: ______________________________ Date: ______________ Hr: _________

Assignments

PART C: The Science of Macaroni Salad

1. What is NOT characteristic of a mixture?

a. Two or more elements are combined with one another.

b. A chemical change occurs within a mixture

c. Elements in a mixture are combined without creating a chemical reaction.

d. All of the above.

2. What are the three main types of mixtures?

a. girded, lattice, suspension

b. solid, liquid, gas

c. solution, colloid, suspension

d. none of the above

3. What is a characteristic of a solution?

a. The particles are visible and identifiable with the naked eye.

b. The particles are too small (they are molecules)

c. They contain emulsifiers that help two substances that do not blend.

d. All of the above.

4. How do you chemically “unmix” things?

a. create a solution

b. turn everything into a colloid

c. break some bonds

d. mix everything together

5. What are examples of mixtures that are easier to physically separate?

6. What are examples of mixtures that are difficult to physically separate?