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RUDIKE [14]
3 years ago
11

What extrusive igneous rock type cooled so quickly that visible crystal grains never grew, and the rock is composed entirely of

black silicate glass that easily shatters into sharp, knife-like shards?
(A) Obsidian
(B) Pumice
(C) Scoria
(D) Tuff
Geography
2 answers:
Len [333]3 years ago
8 0
I think the answer is A
Kipish [7]3 years ago
4 0

Answer:

A. Obsidian

Explanation:

It fits the property described in the question.

It cools so fast that no visible crystal or grain could form. It has high silica Composition, black and glassy. It is also used to make tools with sharp edges

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OverLord2011 [107]
The Mississippi-Missouri-Ohio river system is the largest and most significant river system in the world.
8 0
4 years ago
Select the correct answer.<br> Which of these igneous rocks is intrusive?
statuscvo [17]

Answer:

Granite

Explanation:

Obsidian is an extrusive rock, as it is formed on the surface of the Earth from lava, which is magma that has emerged from underground. However, granite is intrusive since it is formed from magma that cools and solidifies within the crust of the planet.

7 0
3 years ago
Read 2 more answers
The concept that geological layers are laid down, one on top of the other, according to processes that still continue is known a
mariarad [96]

Answer:

Law of Superposition

Explanation:

According to the law of superposition, the sediments are usually deposited on top of one another, giving rise to the formation of sedimentary layers. In an undisturbed sedimentary sequence, the layers that are formed at the apical portion are the youngest and the layers that are found at the base are the oldest.

Thus, the concept of laying down of sediments on top of one another is the law of Superposition.

5 0
3 years ago
What is study of geographic​
mafiozo [28]

Answer:

The term Geo means earth. In short it is a study of earth in a much wider perspective.

1.The subject is very important as it helps up to learn about people living in various continents or countries (lifestyle,occupation,culture and society).

2.It also helps us to learn about the various climatic conditions at various places of earth,topography,flora and fauna(plants and animals).

Geography is defined as 'the study of the physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these, including the distribution of populations and resources and political and economic activities.'

4 0
2 years ago
What effect does Technology have on Cultural Diffusion?
Tomtit [17]

Answer:

Because of technological advancements, the rate at which culture spreads has slowed.

This is because of developments in communication technology and the media, globalization allows for the exchange of ideas, information, goods, and services.

Explanation:

i hope this is able to help you somehow, please tell me if you need a different answer or if you need more information on the effects of technology against cultural diffusion :)

8 0
2 years ago
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