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organism

a living thing

reproduction

the way organisms make more of their own kind

environment

everything that surrounds an organism; includes air, water, soil and other organisms

respond

to react; when the environment changes, organisms do this

cells

the basic building blocks of life; all living things are made of these

microscope

a device that uses glass lenses and allow people to see very small things

communicate

to share information

cytoplasm

a clear, jelly-like material that fills plant and animal cells

cell membrane

the thin outer covering of the cell; plant and animal cells have this

nucleus

the control center of the cell; plant and animal cells have this

cell wall

a stiff layer outside the cell membrane that only plant cells have

chloroplasts

makes food for the plant cell; they are green

minerals

a naturally occurring substance that is neither plant nor animal

root

the plant part that grows underground; holds the plant in the ground and takes in water and minerals for the plant

stem

the plant part that supports the plant and helps it stand upright

leaves

the main food-making part of the plant

chlorophyll

makes the plants leaves green; traps the energy in sunlight for the plant

energy

chlorophyll traps this from the sunlight for the plant

oxygen

a gas that is in air and water; people and animals need this to live

life cycle

all of the stages in an organism's life

plant embryo

a young plant this is just beginning to grow

heredity

the passing of characteristics from parent to offspring

flowering plants

plants that produce seeds in flowers; most plants in the world are these

conifer

trees that produce seeds in cones; pine trees and spruce trees are these

pollen

a powdery material in flowering plants that is needed by the eggs to make seeds

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