Lecture 1- Science, Matter And Energy Flashcards
Questions generally arise from
Observations and experiments
What is science?
A systematic process of asking questions and searching for answers to those questions
When answers must be potentially testable by further observation and experiments this is called
Testability or falsifiability
Questions that cannot be tested and subjects that are not observable are
Beyond the realm of science
Steps of the scientific method:
First observed phenomena second ask a question third form a hypothesis fourth test the hypothesis fifth re test the hypothesis as well as other hypotheses sixth formulate a theory seventh formulate a law
What happens to hypotheses that are consistent with the data?
Tentatively accepted
What is matter?
Anything that has mass and volume.
What is an Atom?
The smallest indivisible unit of matter that is unique to a particular element.
What is an element?
A pure chemical substance, forms the building blocks of all matter
What is a molecule?
A unit of two or more atoms held together by very strong chemical bonds
What is a compound?
A unit of two or more elements combined in fixed proportions by chemical bonds
What is the law of conservation of matter?
Matter neither created or destroyed
What is energy?
Capacity to do work or cause change
What is the first law of thermodynamics?
Energy changing from one form to another proceeds from a high state organization to a lower state
Most of the streams of energy arriving on the surface of Earth is
Sunlight
