The height of a mountain can be told by measuring the height above ________ ________ .
- sea level
- ocean bottom
- mountain top
- flat land
Weathering breaks rocks into smaller ________ and erosion is the movement.
- plants
- erosion
- organic
- pieces
______________ is the mixture of plants, animals and rock combined over many years.
- Rock
- Organic
- Soil
- Inorganic
Rocks are made into smaller rocks but stay the same kind in ________ weathering.
- chemical
- erosion
- mechanical and chemical
- mechanical
Three kinds of mechanical weathering are ice wedging , abrasion and plant _________ .
- leaves
- roots
- grabbers
- stems
Chemical weathering is different than mechanical because ___________ materials are made.
- the same
- new
- the same color
- a larger amount
Soil is made of organic, or ________ and non organic or non living materials.
- rock
- dead
- clay
- living
In the top layers of soil, ________ break up materials and make it rich.
- composers
- weathering
- decomposers
- rocks
Soil horizons are labeled, from the surface, as ___ , ___ and ___.
- Top Middle Bedrock
- A B C
- T M B
- X Y Z
Weathering breaks rocks into ________ pieces and erosion is the movement.
- organic
- larger
- plants
- smaller
How are boulders and clay related?
- they are all round
- they roll uphill
- they are both organic
- they are made of the same materials
Water gets into cracks and freezes splitting the rock. This is ________
- water wedging
- ice wedging
- ice freezing procedure
- ridiculous
The formation on the ceiling of a cave is a _______________
- stalactite
- mineral
- stalagmite
- rock
Most of Earth’s fresh water is ________ and not available for use.
- in the atmosphere
- held in rocks
- frozen
- liquid
________ percent of the Earth’s water is salt water in the oceans.
- 93
- 3
- 79
- 97
Why do we need to protect our fresh water supply?
- We can always get more
- We do not need to protect it.
- It is a small part of the water on the planet
- It will make us sick to drink polluted water.
Where is most of the fresh water found?
- in the ocean
- oceans
- ponds
- frozen
We use fresh water most in the following ways: recreation, drinking and ________ .
- factories
- mines
- highways
- farming
A stream or river begins at the ________ . It may have many separate ones.
- bank
- erosion
- source
- mouth
What is the river’s load.
- material that is moved downstream
- 34 pounds
- the amount of salt water in it.
- what is not carried downstream
Smaller streams that feed into other streams are ________ , they contribute.
- esturary
- mouth
- tributary
- field stream
Why are watersheds so important?
- hold soil
- All the answers combined
- protect water
- slow run off
Land that drains into a river is a ________ , and a ________ happens when there is too much water there.
- watershead - flood
- flood - stream
- watershead - river
- stream - flood
Why are estuaries so important?
- water is cleaned
- pollution is removed there
- fish lay eggs there
- industry is found there
A(n) ________ is an area of a river where salt water and fresh water mix.
- ocean
- esturary
- stream
- rivulet