Question

ACTIVITY 3 - How Body Waves Behave

Directions: A word bank is found in the next page containing answers for this activity. Choose the best answer that best describes every part of the illustration. Write your answer on the space provided for. ​

Answer 1

Earth's layers include the solid Inner Core, liquid Outer Core, hot solid Mantle, and thin solid Crust. Seismic waves, P and S waves, provide insights into Earth's composition. P waves travel through both solids and liquids, while S waves can only move through solids.

The is a diagram of the layers of the Earth. The layers are labeled from the inside out as follows:

Inner core: The innermost layer of the Earth, a solid ball of iron and nickel about 1,220 kilometers (756 miles) in radius.

Outer core: The liquid layer surrounding the inner core, also composed of iron and nickel, about 2,440 kilometers (1,516 miles) thick.

Mantle: The thickest layer of the Earth, made up of hot, solid rock, about 2,890 kilometers (1,800 miles) thick.

Crust: The outermost layer of the Earth, a thin, solid shell made up of rock. The oceanic crust is about 8 kilometers (5 miles) thick, and the continental crust is about 35 kilometers (22 miles) thick.

The image also shows two types of seismic waves:

P waves: Primary waves, which are compressional waves that travel through the Earth like sound waves. P waves can travel through both solids and liquids.

S waves: Secondary waves, which are shear waves that travel through the Earth like ripples on a pond. S waves can only travel through solids.

Answer 2

The word bank according to the illustration is :

1: Crust

2: P-wave

3: S-wave

4: Mantle

5: Outer core

6: Inner core

7: Liquid

8: P-wave ray path

9: S-wave ray path

10: Epicenter

• S-wave and has the following characteristics :

Travels slower than P-waves

Travels through solids only

Arrives second at a seismograph station

Causes shear motion

Cannot be used to measure the distance of an earthquake

Can be used to determine the type of rock in the Earth's crust

• The Outer core is the Liquid layer and has the following characteristics :

Located between the crust and the mantle

Transmits S-waves, but not P-waves

P-waves are refracted through the outer core

S-waves are slowed down in the outer core

• Inner core is the Solid layer and has the following characteristics :

Located at the center of the Earth

Transmits both P-waves and S-waves

P-waves arrive at the inner core at a sharp angle and are reflected back to the surface

S-waves arrive at the inner core at a gradual angle and are transmitted through the inner core

• The Mantle is the thickest layer of the Earth:

Located between the crust and the outer core

Transmits both P-waves and S-waves

P-waves travel faster through the mantle than through the crust

S-waves travel slower through the mantle than through the crust

• Crust is the thin, outermost layer of the Earth and has the following characteristics :

Transmits both P-waves and S-waves

P-waves travel slower through the crust than through the mantle

S-waves travel faster through the crust than through the mantle