によって Raad Mohmed 1か月前.
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controlling air pollution
using soil fences
getting rid of trash
using suitable amount of fertilizers
keeping green areas
treatment of sewage
grassland
ocean
could happen
Human activities
Building factories
Building houses
Natural changes
forest fires
volcanic eruptions
stream
forest
desertification
deplete the soil
soil in a bog
soil and climate
dry soils
dry areas
humid areas
tools
3 funnels
3 measuring cups
soil
water
stop watch
magnifying glass
3 filter papers
organic
remains of dead plants and animal
inorganic
Rocks
home to many animal
Bacteria
Fungi
Insects
Worms
for plants
clay soil
silt soil
sand soil
human growth
behavior development
Body structure
difficulty to obtain food
Subtopic
Health care
Good habits
Sphynx cat
Birman cat
cold deserts
Hot deserts
an ecosystem
larg ecosystem
any ecosystem
Biotic factor
Animals
Human
Abiotic factor
Water
Air
small ecosystem
grasses
spiny shrubs
palms
desert
lizard
tropical rain forest
poison dart frog
arctic
fox
genetic
size of habitat
availability of water
eagles
falcons
behavioral
structural