Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to produce food. This process is essential for plant growth and energy production.

A solid has a definite shape and volume because its particles are tightly packed. In contrast, liquids and gases have particles that move more freely.

Herbivores are animals that feed exclusively on plants. This dietary habit distinguishes them from carnivores and omnivores.

The skull encases and protects the brain, acting as a hard shield against injuries. It is a vital component of the human skeletal system.

A thermometer is designed to measure temperature by detecting heat changes. It is commonly used in both scientific and everyday contexts.

Plants absorb carbon dioxide during photosynthesis to produce glucose and oxygen. This process is essential for converting solar energy into chemical energy.

The Sun provides the primary energy that supports life by driving processes like photosynthesis and weather patterns. Its energy is fundamental to the Earth's ecosystems.

Elasticity refers to the ability of a material to return to its original shape after deformation. It is an important property in understanding material behavior under stress.

Mars is known as the Red Planet due to its reddish appearance caused by iron oxide on its surface. This distinct color makes it one of the most recognizable planets in our solar system.

A habitat is the natural environment in which an organism lives, including all the factors that affect its survival. It provides food, shelter, and a place for reproduction.

The circulatory system, which includes the heart and blood vessels, transports blood throughout the body. This system supplies oxygen and nutrients while removing waste products.

Gravity is the force that attracts objects toward the center of the Earth, keeping us grounded. It is a fundamental force responsible for the motion of celestial bodies as well.

Solar energy is derived directly from the sunlight and can be converted into electricity using solar panels. It is one of the cleanest and most sustainable energy sources available.

Ecologists study ecosystems by examining the interactions between organisms and their physical surroundings. This holistic approach helps to understand biodiversity and ecological balance.

The water cycle describes the continuous movement of water through evaporation, condensation, precipitation, and collection. This natural process is vital to sustaining life on Earth.

Density is calculated by dividing the mass of a substance by its volume. This measurement helps scientists understand how compact a material is and classifies different substances.

Producers, such as plants, use photosynthesis to generate energy and form the foundation of the food chain. Their ability to convert sunlight into chemical energy is essential for the survival of other organisms.

The pH level, which indicates how acidic or basic a solution is, is measured using pH paper or a pH meter. These tools provide a quick and accurate reading of a solution's acidity.

Recycling helps conserve natural resources by reusing materials and reducing the need for raw resource extraction. It also minimizes waste pollution, contributing to a healthier environment.

The phases of the Moon occur due to the changing angles between the Earth, Moon, and Sun as the Moon orbits Earth. This variation in perspective causes different portions of the Moon's illuminated surface to be visible.