front 1 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 | back 1 dissolve |
front 2 liquid water that falls from the sky | back 2 rain |
front 3 single-celled organisms without an organized nucleus | back 3 bacteria |
front 4 a measure of how hot or cold a substance is | back 4 temperature |
front 5 a measure of acidity or alkalinity | back 5 pH |
front 6 a compound made of hydrogen and oxygen | back 6 water |
front 7 relating to water | back 7 aquatic |
front 8 water that is not fresh; water that has things dissolved in it that make it taste salty | back 8 salt water |
front 9 water that is not salty, such as that found in streams and lakes | back 9 freshwater |
front 10 a coastal body of water where fresh water from a river mixes with salt water from the ocean | back 10 estuary |
front 11 water stored below Earth's surface in soil and rock layers | back 11 groundwater |
front 12 When soil is moved from one location to another by wind or water. | back 12 erosion |
front 13 a large body of salt water that covers most of Earth | back 13 ocean |
front 14 to take in matter or energy | back 14 absorb |
front 15 resources that are obtained from the earth | back 15 natural resources |
front 16 something that is very tiny | back 16 particle |
front 17 consists of living and nonliving things in their environment, that interact with each other and with their environment. | back 17 ecosystem |
front 18 the location in which an organism lives | back 18 habitat |
front 19 a group of organisms that share similar characteristics and can mate with each other to produce offspring | back 19 species |
front 20 plant-like organisms in kingdom Protista | back 20 algae |
front 21 the continual movement of water between the land, ocean, and the air | back 21 water cycle |
front 22 the presence of many different types of organisms in an ecosystem | back 22 biological diversity |
front 23 The biological processes that enable plants and animals to thrive successfully in their environments. | back 23 adaptation |
front 24 any individual living thing | back 24 organism |
front 25 a substance that has a unique composition and properties; it may exist as a solid, liquid, or gas | back 25 chemical |
front 26 all the living and nonliving things that surround an organism | back 26 environment |