Chemistry Basics
This muscular organ pumps blood through the body and is roughly the size of a fist.
What is the heart?
This star at the center of our solar system provides nearly all of Earth's energy.
What is the sun?
This unit of force accelerates one kilogram at one meter per second squared.
What is the newton?
This green pigment captures light energy for photosynthesis.
What is chlorophyll?
The number of protons in an atom's nucleus, which defines the element, is called this.
What is atomic number?
This organ filters blood to produce urine and helps regulate water and electrolyte balance.
What is the kidney?
This planet is the largest in our solar system and has a giant storm called the Great Red Spot.
What is Jupiter?
This quantity, equal to mass times velocity, is conserved in an isolated system.
What is momentum?
This organelle is the site of photosynthesis in plant cells.
What is the chloroplast?
Balancing 2H₂ + O₂ → 2H₂O shows this law, which states that matter is neither created nor destroyed in a reaction.
What is the law of conservation of mass?
This is the largest and strongest bone in the human body, located in the thigh.
What is the femur?
This type of rock forms from cooled magma or lava, such as basalt and granite.
What is igneous rock?
Ohm's law states that voltage equals current multiplied by this quantity.
What is resistance?
Organisms that eat only plants are called this.
What are herbivores?
At standard temperature and pressure, one mole of any ideal gas occupies about this many liters.
What is 22.4 liters?
This hormone, made by the pancreas, lowers blood glucose by helping cells take up sugar.
What is insulin?
This layer of Earth, between the crust and the core, is the thickest layer.
What is the mantle?
This law states that a gas's pressure is inversely proportional to its volume at constant temperature.
What is Boyle's law?
This term describes the variety of life in an ecosystem, measured at the genetic, species, and ecosystem levels.
What is biodiversity?
This type of bond forms when atoms share electrons, as in the H–H bond of H₂.
What is a covalent bond?
This iron-containing protein in red blood cells carries oxygen from the lungs to the tissues.
What is hemoglobin?
This layer of the atmosphere contains most of the ozone that absorbs ultraviolet radiation.
What is the stratosphere?
This constant, about 6.674 × 10⁻¹¹ N·m²/kg², appears in Newton's law of universal gravitation.
What is the gravitational constant (G)?
This gradual change in a community's species over time, after a disturbance, is called this.
What is ecological succession?