Science Vocabulary
Unit A  Chapter 2
(14 words)

adaptation – a characteristic that enables a living thing to survive in its environment

cambium – the layer in plants that separates the xylem from the phloem

cortex – the layer of tissue just inside the epidermis of a plant’s roots and stems

epidermis – an outermost layer of such plant parts as roots and leaves

phloem – the tissue through which food from the leaves moves down through the rest of a plant

photosynthesis – the food-making process in green plants that uses sunlight

respiration – the release of energy in plants and animals from food (sugar)

response – what a living thing does as a result of a stimulus

root cap – a thin covering made up of cells that protect the root tip of a plant as it grows into the soil

root hairs – threadlike projections from a plant root that absorb water and dissolved minerals from the soil

stimulus – something in the environment that causes a living thing to react

transpiration – the loss of water through a plant’s leaves

tropism -  a response of a plant toward or away from a stimulus

xylem – the tissue through which water and minerals move up through
a plant