Rocks and Minerals by UTH Rocks and Minerals by UTH    

Lesson 16: Ore

Directions

Study the lesson for one week.

Over the week:

• Read the lesson.
• Review the synopsis.
• Recite aloud the vocabulary words and their definitions.
• Study the rock and mineral of the week.
• Complete the enrichment activities.
• Study the review questions.

Synopsis

Ore is a substance containing valuable metals or gems that can be separated out and sold at a profit. For example, Hematite (Fe2O3) is mined to extract iron, and galena (PbS) is mined to extract lead (Pb).

Vocabulary

Ore: Rock or other material that contains valuable or utilitarian materials; primarily a rock containing metals or gems for which it is typically mined and processed.
Metal: Any of a number of chemical elements in the periodic table that form a metallic bond with other metal atoms; generally shiny, somewhat malleable and hard, often a conductor of heat and electricity.

Rock or Mineral of the Week

• Galena is the primary mineral ore from which lead is extracted.
• Lead is a heavy, pliable, inelastic metal element, having a bright, bluish color, but easily tarnished; both malleable and ductile.
• Lead gets it periodic table symbol 'Pb' from the Latin word for lead - plumbum.
• Lead is used in auto batteries, solders, ammunition, weightlifting weights, and radiation protection (e.g. lead apron).

Physical Characteristics of Lead

• Color: Gray
• Hardness: 2-2.5
• Luster: Metallic
• Cleavage: None
• Streak: Gray
• Tenacity: Ductile (can be drawn into wire) and malleable (can be pounded into sheets)

Locations

• Lead is mined in China, Australia, the United States, Peru, and other countries

Interesting Facts

• Lead is toxic. Side effects from lead poisoning include developmental delay in children, loss of appetite, weight loss, fatigue, stomach pain, vomiting.
• Lead was once used in paint. However, lead paint for residential uses was outlawed in the United States after people, especially small children, became poisoned with lead from eating lead paint chips and inhaling lead paint dust or fumes.

• Despite it being called the 'lead,' the black part of pencils is actually made from graphite. Although inadvisable, lead can be used for writing. The ancient Romans used a lead writing implement called a stylus.

Enrichment

Activity 1: Narrate the Lesson

• After reading or listening to the lesson, narrate the lesson aloud using your own words.

Activity 2: Can You Find It?

Find the following elements on the periodic table:

• Lead (Pb)
• Sulfur (S)
• In which group and period is lead (Pb)?
• In which group and period is sulfur (S)?

Activity 3: Map the Lesson

• Lead is found in multiple countries including China, Australia, the United States, and Peru.
• Zoom in to find these countries on the map of the world.

Activity 4: Take a Nature Walk

• Embark on a nature walk.
• Collect one rock or mineral specimen.
• Use the gathered specimen to create the field book entry.

Activity 5: Complete a Field Book Entry   

After your nature walk, complete page 6 in 'Fifth Grade Science Rocks and Minerals Notebook Pages.'

Review

Question 1

Describe something about lead (Pb).

1 / 4

Answer 1

Lead is a gray metallic and toxic element used in batteries, ammunition, and weightlifting weights.

1 / 4

Question 2

Is lead (Pb) a compound?

2 / 4

Answer 2

No, lead (Pb) consists only of a single type of element.

2 / 4

Question 3

Is galena (PbS) a compound?

3 / 4

Answer 3

Yes, galena (PbS) is a compound consisting of two types of elements - lead (Pb) and sulfur (S).

3 / 4

Question 4

Should you ingest lead?

4 / 4

Answer 4

No, lead is toxic to people.

4 / 4

❮ ❯

1. Describe something about lead (Pb). Lead is a gray metallic and toxic element used in batteries, ammunition, and weightlifting weights.
2. Is lead (Pb) a compound? No, lead (Pb) consists only of a single type of element.
3. Is galena (PbS) a compound? Yes, galena (PbS) is a compound consisting of two types of elements - lead (Pb) and sulfur (S).
4. Should you ingest lead? No, lead is toxic to people.

References

'Pencil.' Wikipedia. en.wikipedia.org/wiki/Pencil. n.p.

'Galena.' Wikipedia. en.wikipedia.org/wiki/Galena. n.p.

'Lead.' Wikipedia. en.wikipedia.org/wiki/Lead. n.p.

Cited Physical Properties. Geology.com. geology.com/rocks. n.p.