Grade 1 - A History Of The Earth

The History of the Earth: Supplemental Guide 5A | Minerals 95

Vocabulary Preview 5 minutes

Minerals

 Show image 5A-5

1. Today you will learn that most rocks contain several different
   minerals.


2. Say minerals with me three times.


3. Minerals are natural substances found in rocks or in the
   ground.


4. Diamonds are a type of mineral. Gold is also a type of mineral.
   Ika liked the way minerals made some stones look very bright
   and colorful, such as red rubies.


5. Look at this picture; the ruby and sapphire get their bright
   colors from minerals. [Point to the ruby, and explain that it
   gets its color from a red mineral. Point to the sapphire, and
   explain that it gets its color from a blue mineral.]
   Turn and tell your partner how you think minerals help to make
   a rock special.
   Crystals

 Show image 5A-4: Varieties of quartz

1. Today you will hear that some minerals form perfect crystals.
   [Point to the image on the top left.]


2. Say crystals with me three times.


3. Crystals are small pieces of minerals and rocks that have
   many sides and distinct shapes.


4. When Lillian took the container of ice cream out of her freezer,
   she found tiny ice crystals on the top.
   Tyrell knew it was cold outside when he saw ice crystals on
   his window.


5. Look at this image and tell me whether you see any crystals.
   [Call on different volunteers to point out the crystals.]