Atoms & Chemical Reactions
The smallest unit of matter that retains the properties of an element.
What is an atom?
The structures in cells that contain DNA.
What are chromosomes?
The scientist most associated with natural selection.
Who is Charles Darwin?
The long-term pattern of weather in a region.
What is climate?
The phase when the Moon is completely illuminated from Earth's perspective.
What is a full moon?
This chart organizes elements by atomic number and properties.
What is the periodic table?
A version of a gene.
What is an allele?
Preserved remains or traces of ancient organisms.
What are fossils?
Uneven heating of Earth by the sun creates temperature and pressure differences which drive ... ?
What are global winds?
The event that occurs when the Moon passes between Earth and the Sun.
What is a solar eclipse?
A substance with a pH less than 7.
What is an acid?
The process by which DNA instructions are used to build proteins.
What is protein synthesis?
The gradual change of species over time.
What is evolution?
Large movements of water that help distribute heat around Earth.
What are ocean currents?
The force that keeps planets in orbit around the Sun.
What is gravity?
This occurs when the molecular structure of a substance is altered and can form one or more entirely new substances.
What is a chemical change/reaction?
An organism's physical characteristics.
What is phenotype?
Scientists use this scale to divide Earth's 4.6-billion-year history into eras and periods.
What is the geologic time scale?
Carbon dioxide, methane, and water vapor are examples of these gases.
What are greenhouse gases?
A massive collection of stars, gas, and dust held together by gravity.
What is a galaxy?
This law states that matter cannot be created or destroyed during a chemical reaction.
What is the Law of Conservation of Mass?
What molecule carries genetic information?
What is DNA?
Similar bone structures in different organisms that suggest a common ancestor.
What are homologous structures?
Human activity most responsible for the recent increase in atmospheric carbon dioxide.
What is the burning of fossil fuels?
Which planet has the most moons currently known?
What is Saturn?