Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chemistry Ch. 1

Atoms combine to form? molecules
Scientific laws describes... HOW nature behaves
A scientific law can be proven... over and over
A good hypothesis is ____meaning it makes predictions that can be confirmed or refuted by further explanations. falsifiable
The Law of Conservation of Mass states: matter is neither created or destroyed
We call a specific instance of matter a ___ substance
What are the characteristics of a solid? fixed volume, tightly packed and rigid shape
A pure substance is either an ___ or ___ element or compound
A mixture is 2 or more substances that are not chemically combined
An element is a substance that cannot be broken down into anything simpler
What is a compound? 2 or more chemically combined elements
When the mixture looks the same throughout, this is called a ____ homogeneous mixture
A heterogeneous mixture is a mixture that____ looks different throughout (you can see the different particles)
What is decanting? separating a solid from a liquid by carefully pouring off liquid
Volatile means ____ easy vaporizable
Matter can be broken down into what 2 categories? A pure substance and mixture
A mixture can be ____ or _____ homogeneous / hertergoneous
A property that changes when the size of the sample changes is a ____. extensive property
Examples of an extensive property are: mass, volume and length
An intensive property: doesn't change when you take away some of the sample
Temperature, color, hardness, melting point, and density are examples of an ___ property intensive property
Pouring a mixture through a filter paper to separate the solid from the liquid is called___ fifltration
Distillation is a process where ___ liquids are boiled offf
Unit for length: meter (m)
Unit for mass: kilogram (kg)
Unit for time: second
Unit for amount of subtsance: mole (mol)
With a physical change, the ___ changes, the substance does not appearance
In a chemical change, the ____ change substance
How close a particular measurement is to the correct value is the ____ accuracy
Precision is: the consistency of repeated measurement
The more consistent the results, the more ____ the measurement is precise
Numbers are not significant when: 1. they are leading zeros 2. zeros at the end of a number doesn't have a decimal point
The more digits, the __ certainty more
The less digits, the __ certainty less
Numbers that have NO certainty are called: exact numbers
An error that tends to be too high or too low are called: systematic errors
given unit x desired unit/given unit = desired unit
Created by: Mariahj25



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards