Weathering
What does weathering break down?
Rocks
What does Physical Weathering do to rocks?
Makes them smaller.
When rocks get hot and then cold, what can happen to the rocks?
They can crack
True or False: Chemical Weathering occurs when minerals in rocks are changed by chemicals.
True
What is the main ingredient in acid rain?
Carbon Dioxide Gas
What 2 things do rocks need to be exposed to for weathering to happen?
Water and Air
What happens when a big rock drops from a cliff?
It breaks the rock into many pieces.
What does water of when it freezes?
It expands.
Where are the 2 main chemicals found that can change rocks in chemical weathering?
Water and Air
Fill in the Blank: Carbon dioxide gas and other ____________ in the air dissolve into water droplets.
pollution
Name an example of something that people move to different places.
Soil, Plants, Trees
All rocks are made up of _________?
minerals
If water freezes inside a rock and expands, what can happen to the rock?
It can break and crack the rock.
What happens to the starting minerals in the rock when chemical weathering occurs?
They change into new minerals.
Limestone and Marble both contain __________.
calcite.
Water, wind, and ice are continually changing the Earth's _____________?
Surface
Do the minerals change in the rock when physical weathering occurs?
No
When the ice thaws and melts, the rock can then ___
break into smaller pieces.
What element is found in almost all rocks?
Iron
Acid rain can cause _________ to form in limestone and marble.
holes
About how long does weathering happen?
It is a very slow process and takes years
Give a definition for Physical Weathering.
Physical weathering is the process that breaks rocks apart without changing their chemical composition.
Do you think rocks have a better chance of frost wedging if they are in Joshua Tree National Park or Yosemite National Park? Why.
True or False: Rocks cannot rust
False
What caused the Statue of Liberty to change its color?
Oxidation.