Prayer
Heavenly father, grant me each day the desire to do my
best, to grow mentally and morally as well as physically. To be
kind and helpful to my classmates and teachers, to be honest
with myself as well as with others. Help me to be a good sport
and smile when I lose as well as when I win. Teach me the value of
true friendship. Help me to always conduct myself so as to bring
credit to my school. Amen.
Layers of the Earth
Quarter 3, Week 1, Day 1
Layers of the
Earth
• Earth is made up of layers with
different compositions
Layers of the Earth
Layers of the Earth
Crust is the outermost and thinnest
layer of the Earth (around 5 to 70 km
deep). The crust that lies beneath the
ocean bed is called oceanic crust, while
the land is called the continental crust.
Layers of the Earth
Mantle is the thickest layer of the
Earth. The mantle is semi-liquid, sort of
like a malleable plastic and makes up
84% of Earth's volume. It is divided into
upper mantle (up to 670 km below the
surface) and lower mantle (between 670
to 2890 km below the surface).
Layers of the Earth
Outer core is located beneath the mantle
(2,200 km thick). It is made up of hot, molten
iron and nickel (up to 5,000°C). This layer
spins as the planet rotates and creates Earth's
magnetic field, which helps to protect us from
the Sun's solar radiation.
Layers of the Earth
Inner core is the deepest layer of the Earth. It’s about 1,230 to
1,530 km thick and can be as hot as the surface of the sun, about
5505 °C. Like the outer core, it is made up of iron and nickel,
but due to high pressure, these metals remain solid.
Check your Understanding
Instructions: Name the different layers of the Earth , and answer the following question.
Check your Understanding
MANTLE
1. What is the thickest layer of the Earth? _______________________________
CORE
2. Which layer is at the center of the Earth? _______________________________
OCEANIC CRUST
3. Type of crust that lies beneath the ocean bed. _______________________________
CONTINENTAL CRUST
4. The land is called __________________________.
MANTLEis semi-liquid, sort of like a malleable plastic and makes up 84% of Earth's volume.
5. The _____________
6. It is made up of hot, molten iron and nickel __________________________________________
CORE
7. It is the deepest layer of the Earth. ____________________________________________
INNER CORE
8. This layer spins as the planet rotates and creates Earth's magnetic field. _____________
OUTER CORE
9. The inner core is made up of solid ________________ and __________________
NICKEL
IRON
10. It is the outermost and thinnest layer of the Earth. __________________________
CRUST