Physical science quiz number 1 Flashcards
What is science ?
It is a system of knowledge and methods to find knowledge
Why is science exiting
Because you’ll never know what you will find
How does science begin and end
Science begins with curiosity and ends with discovery
What methods are ways to achieve answers in science
Observing and measuring
What are technology and science together
They’re interdependence advances in one lead to advances in the other
Which are the branches of science
Science study is divided into social Anne natural science
Then there’s physical science and biology and chemistry
What are the two main areas of physical science
Chemistry: study of composition, Structure,properties and matter
Physics:study of matter and enegry
The 3 divisions of natural science
Physical
Earth
And space science
What is the problem with subdividing science
That the different areas often overlap one another example much of biology is chemistry and chemistry is physics
What is the scientific method
It’s an organized plan for gathering information
What is the goal of the scientific method
It is to solve and better understand a problem
The steps to the scientific approach
1 observation: information you obtain from you obtain from your sense
2 hypothesis: a proposed answer to a question for it to be useful it. Just be testable
3 testing hypothesis: it is to test the variables changes if they’re kept constant or controlled
4 record data : based on the data you make conclusions
If the data does not support the hypothesis the scientist must make a new one
5 making a theory: once the steps have been successfully completed a theory is an well tested explanation
Why is it important to follow safety precaution in laboratory
Because there are dangerous items
The most important rule for safety
Follow teachers rule
What is a pure substance
Matter that has the same composition
Examples table salt and sugar
What are the two categories substances fall into
Elements and compounds
What are elements
Substance that cannot be Brocken into simpler substances there’s is 1oo elements
And element is fixed composition because it only has one atom
Example of elements
Iron copper silver gold hydrogen oxygen carbon and nitrogen
Swedish chemist that assigned symbols to elements in the year 1813
Jon Berzelius
How do symbols make it easier for scientist to communicate
The allow for scientist that’s peak different languages to speak with no confusion and symbols are made of letters one or two first one is always capitalized
What is a compound
Substances made out of two or more simple substances and can be Brocken into simpler ones
What is a mixture and what are the two kinds
Mixtures tend to have some of the properties of their individual substances but are less constant they can be classified as heterogenous mixture and homogeneous mixtures
What is is a heterogeneous and homogeneous mixture
Heterogeneous mixtures parts are different and can be notified and homogeneous mixtures are barely distinguished because the substance is evenly distributed
Homogeneous mixtures seem to have one substance
Example of heterogeneous and homogeneous mixtures
Heterogeneous
Oil and water
Homogeneous
Sugar water
