Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
What are atoms? |
they are basic building blocks |
|
|
Atoms and molecules are tiny particles that what? |
compose all common matter |
|
|
1 single drop of a mixture contains how many atoms? |
one billion trillion ( 1 X 10^9 X 10 ^12 ) |
|
|
How is soda a mixture of chemicals? |
Because it contains several chemicals like carbon dioxide, water, sugar, dyes, etc. |
|
|
What atoms make up Carbon dioxide? |
two carbon atoms and one hydrogen atom that are held together by chemical bonds |
|
|
One characteristic of carbon dioxide molecules? |
at room temp carbon dioxide molecules turn into gas |
|
|
What atoms are in water? |
two hydrogen, one oxygen |
|
|
What is one characteristic of a water molecule |
they make water a liquid at room temp and liquid to solid at cold temps |
|
|
What happens to water when it turns from liquid to solid? |
it expands and becomes less dense |
|
|
what does chemistry explain? |
it explains the properties and behavior of chemicals |
|
|
what is a systematic approach to science |
the scientific method |
|
|
what are hypothesis? |
interpretations of the observations |
|
|
What do laws do |
they summarize the results of a large number of observations and are proven over and over |
|
|
What are theories |
they explain and give the underlying the CAUSE of observations and laws |
|
|
what does the mass of an object measure? |
they measure the QUANTITY of matter within it |
|
|
what is the scientific law? |
a statement that combines past observations and predicts future ones |
|
|
What is the law of conservation of mass? |
"in a chemical reaction, matter is neither created nor destroyed" but just rearranged |
|
|
What is chemistry? |
the science that seeks to understand what matter does by studying what atoms and molecules do |
|
|
What is the scientific method? |
way of learning that emphasizes observation and experimentation to produce knowledge as the result of the senses |
|
|
What are observations? |
involved measuring or observing some aspect of nature |
|
|
What is the atomic theory? |
all matter is made up of tiny indivisible particles (atoms) |
