"Observe and Describe Minerals" Rocks and Minerals PPT Courseware 2

Description

"Observe and Describe Minerals" Rocks and Minerals PPT Courseware 2

mineral color

Color is the most easily observed characteristic of minerals and is also one of the important bases for identifying minerals. Some minerals are named after their colors.

The degree of brightness on the surface of a mineral is called luster

Divided into: metallic luster, semi-metallic luster, non-metallic luster

Non-metallic luster

Vitreous luster (glass-like luster)

Greasey shine (like smeared with fat)

Pearl luster (like the luster given off by pearls)

Silk luster (like silk fabric shining)

Earthy luster (the surface is dimly reflective like dirt)

mineral streaks

Mineral streaks are traces of powder left behind when minerals are rubbed against unglazed white porcelain. After the mineral is ground into powder, it can eliminate false colors and weaken other colors, so the color of the mineral streaks is relatively fixed. The color of mineral streaks mainly has identification significance for metallic minerals.

Identify gold ore and chalcopyrite

Use the ore to scratch the unglazed white porcelain plate. The streaks drawn by the natural gold ore (that is, the powder left on the white porcelain plate) are golden yellow, and the streaks of pyrite are green and black.

Criteria for judging the hardness and softness of minerals

Soft that can be carved with nails;

Do not carve marks with your fingernails,

But the ones that can be carved with copper keys are softer;

You cannot carve traces with a copper key,

But the ones that can be carved with a knife are harder;

It's so hard that it can't be carved with a copper key or a knife.

What are the hardest and hardest minerals?

Largest: Diamond Smallest: Graphite

transparency

The degree to which light can pass through a mineral is called transparency

Divided into: transparent, translucent, opaque

Keywords: Rocks and Minerals teaching courseware, Observation and Description of Minerals teaching courseware, Educational Science Edition fourth grade science PPT courseware download, Volume 2, Fourth grade science slide courseware download, Rocks and Minerals PPT courseware download, Observation and Description of Minerals PPT courseware download, .PPT Format;

For more information about the "Rocks and Minerals Observation and Description of Minerals" PPT courseware, please click on the Rocks and Minerals ppt Observation and Description of Minerals ppt tag.

"Observing and describing minerals (2)" Rocks and minerals PPT download:

"Observing and Describing Minerals (2)" Rocks and Minerals PPT Download Part One: Importing New Knowledge From what aspects do we already know how to observe and describe minerals? The color of minerals, the streaks of minerals, the hardness of minerals. Let's learn a few more ways to observe and describe minerals...

"Observing and describing minerals (2)" Rocks and minerals PPT:

"Observing and Describing Minerals (2)" Rocks and Minerals PPT Part One: Transparency and Gloss of Minerals What is the light transmission of the following papers? How do we describe the light transmission of these papers? Activity 1: Use a flashlight to shine on transparent paper and translucent paper respectively.

"Observing and describing minerals (1)" Rocks and minerals PPT download:

"Observing and Describing Minerals (1)" Rocks and Minerals PPT Download Part One: Introduction of New Knowledge Thinking: When observing these two minerals, from what aspects did you observe? ◆We can observe the color of minerals; ◆Observe the stripes of minerals; ◆..

File Info

Update Time: 2024-09-23

This template belongs to science courseware Fourth Grade Science Volume 2, Textbook Edition industry PPT template

Preview