general questions
How much of the planet is covered with water?
70% or about 3/4
Are ponds made of fresh water or salt water?
fresh water
What do you call continuous flowing freshwater bodies created by nature?
Rivers
Lakes are formed from (name two) _________, _______, ________, _________.
rain water, river water, glacier water, and sea water
Why are ponds important?
to maintain ecosystems of different species
What are two types of water on the planet?
fresh water and salt water
Ponds are __________ than lakes.
(bigger, smaller)
smaller
Where does the water come from that makes up rivers?
Ice and rainwater
Lake are what kind of water?
Either fresh water or salty water
Which can be man-made? Ponds or Lakes
ponds
Name five types of water bodies
Waterfall, sea, river, lake, pond
Is water in a pond flowing or stagnant?
stagnant (not flowing, it just sits there, and smells unpleasant)
Where do rivers flow to?
Any lake or sea
human life
Which is deeper? ponds or lakes
lakes
Is there low or high oxygen at the bottom of the pond?
low oxygen
Why can plants and crops grow near rivers?
Because the soil is fertile
Two important things that lakes do:
1. control the flows of rivers (otherwise rivers would flood) and 2. restock ground water
Which can have waves? ponds or lakes?
Lakes
What covers the bottom of ponds?
Silt (dead plant leaves)
We need to protect rivers from __________ to save ecosystems.
pollution
What do lakes provide?
fish and minerals
Can sunlight reach the bottom of lakes?
No, lakes are too deep (but sunlight can reach the bottom of ponds because they are less deep)