to add a solid material to a liquid in such a way that its particles completely disperse into the liquid, usually becoming invisible within the liquid
dissolve
liquid water that falls from the sky
rain
single-celled organisms without an organized nucleus
bacteria
a measure of how hot or cold a substance is
temperature
a measure of acidity or alkalinity
pH
a compound made of hydrogen and oxygen
water
relating to water
aquatic
water that is not fresh; water that has things dissolved in it that make it taste salty
salt water
water that is not salty, such as that found in streams and lakes
freshwater
a coastal body of water where fresh water from a river mixes with salt water from the ocean
estuary
water stored below Earth's surface in soil and rock layers
groundwater
When soil is moved from one location to another by wind or water.
erosion
a large body of salt water that covers most of Earth
ocean
to take in matter or energy
absorb
resources that are obtained from the earth
natural resources
something that is very tiny
particle
consists of living and nonliving things in their environment, that interact with each other and with their environment.
ecosystem
the location in which an organism lives
habitat
a group of organisms that share similar characteristics and can mate with each other to produce offspring
species
plant-like organisms in kingdom Protista
algae
the continual movement of water between the land, ocean, and the air
water cycle
the presence of many different types of organisms in an ecosystem
biological diversity
The biological processes that enable plants and animals to thrive successfully in their environments.
adaptation
any individual living thing
organism
a substance that has a unique composition and properties; it may exist as a solid, liquid, or gas
chemical
all the living and nonliving things that surround an organism
environment