1.
What are minerals?
Correct Answer
A. Natural solids
Explanation
Minerals are natural solids that are found in the Earth's crust. They are inorganic compounds that have a specific chemical composition and a crystalline structure. Minerals can be found in various forms and are essential for various geological and biological processes. They are often mined for their valuable properties and are used in various industries such as construction, manufacturing, and technology.
2.
Approximately how many minerals are there?
Correct Answer
A. 2500
Explanation
There are approximately 2500 minerals.
3.
Minerals differ from each other in
Correct Answer
A. Size, shape, composition and colour
Explanation
Minerals can be differentiated based on their size, shape, composition, and color. Size refers to the dimensions of the mineral, while shape describes its overall form or crystal structure. Composition refers to the chemical elements and compounds present in the mineral, which can vary greatly between different minerals. Lastly, color is determined by the presence of certain impurities or chemical elements in the mineral. Therefore, these four factors are key in distinguishing one mineral from another.
4.
All minerals must
Correct Answer
A. Be made up of indefinite proportion of elements
Explanation
Minerals are naturally occurring substances that are formed through geological processes. They are inorganic and are typically composed of various elements. The composition of minerals can vary, as they are made up of an indefinite proportion of elements. This means that minerals can contain different combinations and ratios of elements, which gives them their unique properties and characteristics. Therefore, the statement "Be made up of indefinite proportion of elements" is a correct explanation for the given answer.
5.
All minearls have _____ things in common
Correct Answer
A. 2
Explanation
All minerals have 2 things in common. This suggests that there are two specific characteristics or properties that are shared by all minerals. However, without further context or information, it is not possible to determine what these two commonalities are.
6.
Each mineral must be made up of
Correct Answer
A. Key elements
Explanation
Minerals are naturally occurring substances that are formed through geological processes. They are composed of specific combinations of chemical elements. Therefore, it is necessary for minerals to be made up of key elements. The other options, such as dense materials, chemically bound compounds, and metallic materials, are not essential characteristics of minerals and do not apply to all minerals.
7.
An example of minerals is
Correct Answer
A. Brick
Explanation
Brick is not an example of a mineral. Minerals are naturally occurring inorganic substances with a specific chemical composition and a crystalline structure. Brick, on the other hand, is a man-made material produced by shaping clay or other materials and then firing them at high temperatures. Therefore, brick does not meet the criteria to be classified as a mineral.
8.
Each mineral must be
Correct Answer
A. Organic
9.
Crystals are
Correct Answer
A. Rocks containing gems
Explanation
Crystals are rocks containing gems because gems are typically found in crystalline form within rocks. Gems are precious and valuable stones that are highly prized for their beauty and rarity. These gems are formed through a process of crystallization where minerals solidify and form distinct crystal structures within rocks. Therefore, crystals can be considered as rocks that contain these valuable gemstones.
10.
Minerals are solids with crystal form found in the Earth's crust.
Correct Answer
A. True
Explanation
Minerals are defined as solid substances that have a specific crystal form and are naturally occurring in the Earth's crust. This means that minerals are not liquids or gases, and they have a regular, repeating arrangement of atoms or ions. Therefore, the statement "Minerals are solids with crystal form found in the Earth's crust" is true.
11.
How many questions above were answered using prior knowledge?
Correct Answer
A. 1-2 questions
Explanation
The correct answer is 1-2 questions. This means that only a few questions were answered using prior knowledge. It suggests that the majority of the questions were answered based on other factors such as guessing, deduction, or new information provided in the question itself.