The positively charged central part of an atom
The study of heat and its transformation to and from other forms of energy
The path of an object as it moves around another object in space
The distance from the center of a circle to any point on its circumference
A positively charged subatomic particle found in the nucleus of an atom
The force exerted per unit area
The smallest unit of a chemical compound that retains the chemical properties of that compound
A process by which plants use sunlight to synthesize foods with the help of chlorophyll
A fundamental force of nature responsible for the structure of atomic nuclei
The smallest constituent unit of ordinary matter that has the properties of a chemical element
The measure of the amount of space an object occupies
The ratio of the length of the opposite side to the length of the hypotenuse in a right-angled triangle
A large body of ice moving slowly down a slope or valley
A quadrilateral with opposite sides parallel
The outermost layer of Earth’s atmosphere
A substance that speeds up a chemical reaction without being consumed
The branch of mathematics dealing with shapes, sizes, and properties of space
The energy possessed by a body by virtue of its motion
The smallest structural and functional unit of an organism
A polymer of amino acids, essential for all living organisms
A system of stars, gas, and dust held together by gravitational attraction
The amount of matter in an object, commonly measured in grams or kilograms