CT-1

Living things

Organisms that exhibit characteristics such as movement, growth, reproduction, and response to stimuli.

Non-living things

Objects or substances that do not exhibit the characteristics of living things, such as stones and rain.

Sense organs

Organs that allow living things to perceive their environment, including eyes, ears, noses, taste buds, skin, and antennae.

Photosynthesis

The process by which plants make their own food using sunlight, carbon dioxide, water, and chlorophyll.

Respiration

The process by which living things obtain energy from food, typically requiring oxygen.

Excretion

The removal of waste products from the body of living organisms.

Reproduction

The biological process by which living things produce new individuals, such as animals laying eggs or plants growing from seeds.

Diffusion

The movement of molecules from an area of high concentration to an area of low concentration, resulting in mixing.

Concentration gradient

The difference in the concentration of molecules in two areas, which drives diffusion.

Active transport

The process by which cells move molecules against a concentration gradient, requiring energy.

Osmosis

A special type of diffusion involving the movement of water molecules through a semi-permeable membrane.

Semi-permeable membrane

A membrane that allows certain molecules, like water, to pass through while blocking larger molecules, like sugar.