Unit 1 Vocab Flashcard

Front

What is a hypothesis?

Back

A proposed explanation for a phenomenon made as a starting point for further investigation.

Front

What characterized the 2nd atmosphere of Earth?

Back

Primarily composed of volcanic gasses like carbon dioxide, ammonia, and water vapor.

Front

What characterizes the current atmosphere of Earth?

Back

Composed of 78% Nitrogen, 21% Oxygen, 0.93% Argon, and 0.07% trace gasses.

Front

What does the Nebular Theory propose?

Back

Every solar system forms from a single nebula with lighter elements on the edges and heavier elements in the middle.

Front

What is a theory?

Back

A well-substantiated explanation acquired through the scientific method and repeatedly tested and confirmed.

Front

What is the scientific method?

Back

A systematic process for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is the difference between a scientific law and a theory?

Back

A scientific law describes a consistent and universal observation, while a theory explains why those observations occur.

Front

What is the role of peer review in science?

Back

Peer review is a process where other scientists evaluate research before it is published to ensure quality and validity.