Earth
This layer of Earth is made of hot, melted rock called magma.
What is the mantle?
The ending of a river where it goes into the sea.
What is a mouth?
This is an opening in Earth’s surface where lava comes out.
What is a volcano?
This forms when water vapor cools and turns into tiny drops of water in the sky.
What are clouds?
Oysters often live in groups like these.
What is an oyster bed?
This process breaks rocks into smaller pieces using wind, water, or ice.
What is weathering?
Where the river starts.
What is a source?
Hot melted rock inside a volcano is called this.
What is magma?
When warm air and cold air meet they form this.
What is a front?
Some oysters can make this shiny object used in jewelry.
What is a pearl?
This is the name for molten rock that comes out of a volcano.
What is lava?
This is a large body of moving fresh water.
What is a river?
When a volcano erupts, this hot liquid rock comes out.
What is lava?
This process happens when water vapor cools and turns into liquid droplets to form clouds.
What is condensation?
Oysters eat tiny organisms floating in water by doing this process.
What is filter feeding?
Most of Earth’s fresh water is frozen in these large masses of ice.
What are glaciers?
Rainwater that collects and flows into rivers is called this.
What is runoff?
This happens when a volcano explodes and sends out lava, ash, and rocks.
What is an eruption?
This layer of Earth’s atmosphere is where most weather happens.
What is the troposphere?
Oysters attach themselves to rocks or other surfaces using this substance.
What is cement or natural glue?
This imaginary line divides Earth into the Northern and Southern Hemispheres.
What is the Equator?
A small stream that flows into a bigger river is called this.
What is a tributary?
This is a cloud of ash and gas that comes out of a volcano during an eruption.
What is an ash cloud?
This instrument measures air pressure and helps predict weather changes.
What is a barometer?
This animal is a type of mollusk that filters food from seawater.
What is oyster?