Minerals and Rocks

Which of the following statements is not true about igneous rocks?

• It formed crystals.

• It is formed from magma.

• It can become glassy in appearance.

• It can be formed from an existing rock.

Which type of rock contains plants' and animals' remains?

• chemical rock

• clastic rock

• foliated rock

• organic rock

Tags

NGSS.MS-LS4-1

Obsidian is a rock formed through fast solidification on air when a volcano erupts. What type of rock is obsidian?

• Extrusive igneous rock

• Extensive igneous rock

• Intrusive igneous rock

• intensive igneous rock

Which of the following statement is not true about metamorphic rocks?

• It is formed from plant and animal debris

• it is formed when subjected to high heat and pressure.

• Schist, phyllite and gneiss are examples of metamorphic rocks.

• Foliated and non- foliated are classification of metamorphic rocks.

While walking at the beach, Angela found a rock sample with a crystals white appearance which according to her friend was halite- a rock salt. What type of rock did she find?

• clastic rock

• chemical rock

• metamorphic rock

• organic rock

Which of the following is the least useful property in identifying minerals?

• streak

• luster

• cleavage

• color

What property of mineral is shown if a rock breaks into an irregular pattern?

• fracture

• cleavage

• luster

• hardness

Salt is used in cooking to enhance food taste. Which group of minerals does it belong?

• carbonates

• fluorites

• halides

• sulfides

Angela tests a mineral sample by scratching it to white and black porcelain plate to determine its true color?

• specific gravity

• hardness

• streak

• color

James Dana developed a classification scheme for minerals. Which of the following is the basis of his classification?

• Chemical composition of the minerals

• Hardness of the minerals

• Location of mineral occurrence

• Color of mineral

Tags

NGSS.MS-PS1-1