Refresh – Answer this Review Question

Match the following genotypes with an example

1. Homozygous dominant A. Pp

2. Heterozygous B. pp

3. Homozygous recessive C. PP

PP Pp

Pp pp

Set – Answer this Review Question on your Learning Target

What is the difference between an element and a compound? Give examples.

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Mixing it upWith Mixtures

8th Grade Science

Use with Note-taking GuideQuestions & Lesson Guide for

Mixture Lesson

• They are substances held together by physical forces, not chemical.

• Can be separated physically.

• Solutions are one kind of mixture.

+ =

• Solutions are mixtures of two or more substances that are spread out evenly.

• Example: salt - water solution

• The substance to be dissolved. (salt)

• The substance doing the dissolving. (water)

Images are from http://www.chem4kids.com

•Concentrated means strong Concentrated means strong examples: frozen orange juice in a examples: frozen orange juice in a can, powdered milk, can of soda, can, powdered milk, can of soda,

•Diluted means weakDiluted means weak examples: orange juice mixed in jug examples: orange juice mixed in jug with water, powdered milk mixed with water, powdered milk mixed with water, soda in melted icewith water, soda in melted ice

Concentration of SolutionsConcentration of Solutions

• Are mixtures consisting of parts that are visible to the naked eye.

Example: the ingredients in salad dressing

• Substances will settle over time.

Directions: Shake well before using.

• Particle sizes are in between the size of particles found in solutions and suspensions .• Can be mixed and remain evenly distributed without settling out.

Assess – How much did you learn?

• Name the 3 kinds of mixtures?

• How can you tell the mixtures apart? How is their appearance different?

• Give an example of each type of mixture.