Topic 7: Earth's Interior

Scientists study Earth's interior by ​ ​ (a)   evidence from​ (b)   samples and ​ (c)   evidence from ​ (d)  

• direct
• rock
• indirect
• seismic waves
• earthquakes
• volcanoes

_______ brings up many samples of rocks.

Geologists learn about Earth's ​ (a)   and ​ (b)   deep inside Earth where the ​ (c)   ​are formed.

• structure
• conditions
• rocks

_________ sometimes carry rocks to the surface from depths of more than 100 km.

These rocks provide more information about Earth's interior, including clues about how ​ (a)   and ​ (b)   flow there.

• matter
• energy
• magma
• earthquakes

To study Earth's ​ (a)   , geologists use an ​ (b)   method.

• interior
• indirect
• exterior
• direct

Geologist record the ______ ______ and study how they travel through Earth.

• seismic waves

• core's energy

• rock samples

Seismic waves are produced when __________ occur.

The ​ (a)   of seismic waves reveal where the makeup or form of the ​ (b)   ​ (c)   .

• path
• rock
• change
• stay the same
• energy

How many types of seismic waves are there?