How Earth Changes Over Time

the picking up and removal of rock particles 

• humus
• erosion
• deposition
• moraine

rock that forms when hot, liquid rock material cools and hardens into a solid

• igneous rock
• metamorphic rock 
• sedimentary rock
• sand 

the dropping off of sediment 

• weathering 
• moraine
• mass wasting
• deposition 

rock that forms from pieces of other rocks that are squeezed together 

• metamorphic rocks
• sand
• igneous rock
• sedimentary rock 

age of a rock in years 

• age
• time period
• relative age
• absolute age

material in soil formed by the breakdown of plant and animal material 

• moraine
• humus
• fossil 
• heat 

age of a rock compared to another rock

• relative age
• absolute age
• age

deposit of many sizes of sediment in front of or along the sides of a glacier 

• moraine
• weathering
• fossil 
• deposition 

breaking down of rocks into smaller pieces by natural processes

• mass wasting
• weathering
• erosion
• deposition 

trace, imprint, or remains of a living thing preserved in Earth's crust

• Archeologist
• fossil
• bone
• stone age