This part of the plant absorbs sunlight and helps in the process of photosynthesis.
What are leaves?
This type of heat transfer occurs through direct contact between objects of different temperatures.
What is conduction?
When two objects in contact reach the same temperature, they are said to be in this state.
What is thermal equilibrium?
This weather event is characterized by heavy rain, thunder, lightning, and sometimes hail.
What is a thunderstorm?
This stage in a butterfly's life cycle comes after the caterpillar stage and before the adult butterfly emerges.
What is a pupa or chrysalis stage?
The muscle that pumps blood throughout the body, acting as a natural pump.
What is the heart?
When a substance changes from a solid to a liquid, this process absorbs thermal energy.
What is melting?
This is the transfer of thermal energy by electromagnetic waves.
What is radiation?
This natural disaster is a rotating column of air with extremely high wind speeds, often forming during thunderstorms.
What is a tornado?
This force prevents you from floating away into the atmosphere and keeps you on the ground.
What is gravity?
This is the closest star to Earth and is the center of our solar system.
What is the Sun?
Materials like wood and plastic are known as these, as they resist the flow of heat.
What are insulators?
The first law of thermodynamics states that energy cannot be created or destroyed but can only change this.
What is changes forms?
The process where water changes from a liquid to a gas, rising into the atmosphere.
What is evaporation?
This state of matter has no fixed shape or volume and takes the shape of its container.
What is liquid?
This cold-blooded animal spends part of its life in water and part on land, undergoing metamorphosis from tadpole to adult.
What is a frog?
The measure of the average kinetic energy of the particles in a substance is called this.
What is temperature?
When a substance increases in size due to an increase in thermal energy, it is undergoing this process.
What is expansion?
This term refers to the amount of water vapor present in the air.
What is humidity?
This planet is known as the "Red Planet" due to its reddish appearance in the night sky.
What is Mars?
This form of energy is produced by the movement of electrons.
What is electrical energy?
This type of heat transfer occurs in fluids and involves the movement of warmer and cooler materials.
What is convection?
The unit used to measure the amount of thermal energy absorbed or released in a chemical or physical change.
What is a calorie?
These fluffy clouds are often seen on sunny days and have flat bases with puffy tops.
What are cumulus clouds?
This term describes a community of plants and animals interacting with each other and their environment.
What is an ecosystem?