Glossary results for "E"

a sense organ that allows us to hear

a thin, delicate membrane that separates the outer ear from the middle ear

the third planet from the Sun and the only known planet to support life

a long, segmented worm that lives in soil

the repetition of sound caused by the reflection of sound waves from a surface

an astronomical event that occurs when one celestial body blocks the light from another celestial body

the study of the interactions between living organisms and their environment

a community of living organisms and their physical environment

an American astronomer who discovered that the universe is expanding

the production of bubbles in a liquid

a reproductive body produced by an animal that contains an embryo

a temporary, pointed projection on the beak of some baby birds that helps them to break out of their eggshell

a synthetic chemical element with the symbol Es and atomic number 99

a property of materials that allows them to return to their original shape after being stretched or compressed

a type of energy that can be used to power lights, appliances, and other devices

a scientist who studies the relationship between electricity and chemistry

a piece of metal or other material that is used to conduct electricity into or out of a circuit

a tiny particle that is found in all atoms

a pure substance that cannot be broken down into any other substances

to raise something up

a paleontologist and evolutionary biologist who has made significant contributions to our understanding of how species evolve

a multicellular organism in the earliest stages of development

substances that are released into the atmosphere from human activities

to release a substance into the environment

a paleontologist and evolutionary biologist who studies how plants and animals have changed over time in response to climate change

to mix two liquids that normally do not mix together, such as oil and water

a very strong and protective layer that covers the crowns of the teeth

a species that is at risk of becoming extinct

a rigid internal framework that supports and protects the soft tissues of an organism

the ability to do work

a process of asking questions, gathering evidence, and coming up with explanations

the scientific study of insects

the surroundings of an organism or group of organisms

proteins that act as biological catalysts

a plant that grows on another plant, but does not harm its host plant

a state in which opposing forces are balanced

the tools and materials that scientists use to conduct experiments

a rare-earth element with the atomic number 68

a New Zealander physicist who is considered to be the father of nuclear physics

the process by which the Earth's surface is worn away by the actions of water, wind, ice, and gravity

a rare-earth element with the atomic number 63

to assess the value, importance, or quality of something

the process by which a substance changes from a liquid state to a gaseous state

a term used to describe plants that have leaves that stay green and do not fall off the plant all year round

information that supports a claim

the change in the genetic makeup of a population over time

to change over time in a way that is adaptive

the process by which the body removes waste products from the body

any bodily activity that enhances or maintains physical fitness and overall health and wellness

a rigid external skeleton that supports and protects the body of an animal

a controlled test that is conducted to test a hypothesis

the contact between an organism and a substance or organism that can cause harm

a term used to describe a species of plant or animal that has died out completely

to put out a fire

a type of igneous rock that forms when magma, or molten rock, cools and solidifies on Earth's surface

the short, thick hairs that grow on the edges of the eyelids