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4th Grade Science
Chapter 2 - Living Things and Their Environment
29
Science
4th Grade
02/09/2012

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Term
ecosystem
Definition
interacting parts of an environment (living and nonliving)
Term
biotic factors
Definition
living things in an ecosystem such as plants, animals, and microorganisms
Term
abiotic factors
Definition
nonliving things in an ecosystem such as soil, temperature, rainfall, and sunlight
Term
cactus
Definition
biotic factor in a desert
Term
duck
Definition
biotic factor in a pond
Term
sand
Definition
abiotic factor in a desert
Term
salt water
Definition
abiotic factor in an ocean
Term
nut
Definition
use of plants by animals as food
Term
nest
Definition
use of plants by animals as shelter
Term
pollination
Definition
process of transporting cells to another flower for reproduction
Term
stamen
Definition
part of flower pollinators collect cells called pollen from
Term
pistil
Definition
part of flower pollinators move cells to
Term
seed dispersal
Definition
process of spreading seeds
Term
hook/stick
Definition
method by which seeds stick to fur of an animal to spread
Term
waste
Definition
method by which animals eat seeds and are spread
Term
lighting storm/drought/etc.
Definition
natural events that can change an ecosystem
Term
farming/building/digging
Definition
ways humans can change ecosystems
Term
accommodation
Definition
an individual organism's response to change
Term
eat new food/eat less
Definition
accommodation an organism can make to change
Term
new shelter
Definition
accommodation an organism can make to change
Term
endangered
Definition
an animal or plant species that has very few of its kind left
Term
extinct
Definition
an animal or plant species that has none of its kind left
Term
conservation
Definition
avoiding waste to help protect ecosystems
Term
adaptations
Definition
special features or behaviors that help living things survive in their environment
Term
camouflage
Definition
adaptation of blending into an environment
Term
mimicry
Definition
adaptation of looking or acting like a different organism
Term
storing water
Definition
an adaptation used when living in a desert
Term
nocturnal
Definition
an adaptation when living in a desert
Term
thick fur
Definition
an adaptation to living in the arctic
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