Rocks and Minerals Quick Check
An igneous rock forms quickly. Which characteristic could the rock have?(1 point)
smooth, sharp texture
large mineral crystals
small sand grains
evidence of folding
Which type of rock can be foliated?(1 point)
igneous rock that cools slowly
metamorphic rock
sedimentary rock
igneous rock that cools quickly
Amber, which is made from hardened tree resin, is a gem. Although amber is often used in jewelry, it is not a mineral. Which statement explains why amber is not a mineral?(1 point)
It is not valuable.
It is not solid.
It is not natural.
It is not inorganic.
Which option is a mineral?(1 point)
coal
pearl
garnet
wood
Minerals must have atoms that are tightly packed together and cannot move freely. Which part of the definition of a mineral does this describe?(1 point)
the requirement that minerals must have a defined crystalline structure
the requirement that minerals must be naturally occurring
the requirement that minerals must have a defined chemical composition
the requirement that minerals must be solids
C- Smooth, Sharp texture
A- Metamorphic Rock
D- It Is Inorganic
D- Garnet
B- Must be a solid
1. An igneous rock forms quickly. Which characteristic could the rock have?
- The rock could have small sand grains.
2. Which type of rock can be foliated?
- Metamorphic rock can be foliated.
3. Why is amber not considered a mineral?
- Amber is not considered a mineral because it is not inorganic.
4. Which option is a mineral?
- Garnet is a mineral.
5. Which part of the definition of a mineral describes the requirement that minerals must have atoms that are tightly packed together and cannot move freely?
- This describes the requirement that minerals must have a defined crystalline structure.
To find the answer to the first part of the question, you need to understand the characteristic of igneous rocks. Igneous rocks are formed from the cooling and solidification of molten rock, also known as magma or lava. As magma cools rapidly, it doesn't provide enough time for large mineral crystals to form. Instead, the rock will have a fine-grained texture with small sand grains or a glassy texture. Therefore, the correct characteristic in this case would be small sand grains.
For the second part of the question, you need to identify the type of rock that can be foliated. Foliation refers to the alignment of mineral grains in a rock, resulting in layered or banded textures. This characteristic is commonly seen in metamorphic rocks, where existing rocks undergo intense heat and pressure, causing the minerals to realign and form foliated textures. Therefore, the correct answer is metamorphic rock.
Moving on to the third question, you need to determine why amber is not considered a mineral. To do so, you should understand the definition of a mineral. Minerals are naturally occurring, inorganic substances with a defined chemical composition and a regular internal structure. Amber, in contrast, is derived from hardened tree resin, making it an organic substance of plant origin. Therefore, the correct statement explaining why amber is not a mineral is that it is not inorganic.
In the fourth question, you are required to identify the option that is a mineral. Remember, minerals are inorganic substances with a defined chemical composition and a regular internal structure. Among the given options, coal, pearl, and wood are organic materials, while garnet is a mineral. Therefore, the correct answer is garnet.
Lastly, for the fifth question, you need to match the part of the mineral definition that describes atoms being tightly packed and unable to move freely. This corresponds to the requirement that minerals must have a defined crystalline structure. A crystalline structure refers to the arrangement of atoms in a repeating pattern, which restricts their movement. Therefore, the correct part of the definition is the requirement of a defined crystalline structure.