Surface And Enterior Of Earth Flashcards
(22 cards)
What is the age of the Earth?
About 4.6 billion years.
What is the highest point on Earth’s surface?
Mount Everest.
What separates the Earth’s crust from the mantle?
Moho.
What are the three main layers of the Earth’s interior?
- Crust
- Mantle
- Core
What is the composition of the Earth’s crust primarily made of?
SIAL (silica + aluminium).
What is the innermost part of the Earth called?
Core.
What are the two main types of seismic waves?
- Primary waves (P-waves)
- Secondary waves (S-waves)
Fill in the blank: The crust of the Earth is ______ thick under the continents.
60-100 km
What is the core of the Earth rich in?
Iron and nickel (NIFE).
What natural disaster occurred in Gujarat on January 26, 2001?
A devastating earthquake.
What is the process called that involves the transformation of rock types?
Rock cycle.
What type of rocks are formed from cooling and solidification of magma?
Igneous rocks.
What is the term for rocks that are formed from sedimentation?
Sedimentary rocks.
True or False: The mantle is homogeneous.
False.
What are fossil fuels derived from?
Buried plants and animals.
What is the term for the study of earthquakes?
Seismology.
What happens to rocks due to the agents of gradation?
They break into small pieces.
Fill in the blank: The upper mantle is made up of ______ and magnesium.
SIMA
What is the term for molten material that comes out of the Earth’s surface?
Lava.
What type of rocks are formed under heat and pressure?
Metamorphic rocks.
What is the term for the shaking and trembling of the Earth’s surface?
Earthquake.
What are the common minerals found in the Earth’s crust?
- Iron
- Silver
- Gold
- Mica
- Graphite
