Scientific Method
Cole is testing to see if what he drinks before running effects his finish time. He tests it with water, juice, milk and carrot juice. He wears the same clothes and shoes regardless. What variable would the different drinks be classified as?
Independent Variable
True or False: When elements combine to make a specific compound, they always combine in the same proportions (Example: Water can only be formed as H20, you cannot add extra elements and it still be water)
True
True or False: A Cation is an ion with a positive charge.
True
When taking recently heated glassware, you should clean it in:
Warm Water
A variable that stay the same regardless of what else you are changing is a __________ variable.
Controlled Variable
A _______________ is a substance that cannot be separated or broken down into simpler substances by chemical means
Element
We talked about three models of the Atom. Which of the following is the current model of the Atom?
Electron Cloud Model
True or False: When disposing of chemicals, it is proper procedure to pour all unused chemicals down the drain.
False
A variable that will be changed by the variable you change, meaning this is you are measuring the change of, is a _____________ variable.
Dependent Variable
A pure substance is matter that has fixed composition and definite properties. Is apple juice a pure substance? Yes Or No
No
Matter is anything that has ____________ and takes up ________________
Mass or Space
What are the two protective items required each time you enter a lab area?
Eye Protection and Long Sleeves
Data that refers to the numerical values of what we are observing is:
Quantitative
Carbon (C) is an example of a ________________?
Element
A _________ is the smallest whole particle of matter
Atom
How long should you cleanse out your eyes after getting chemicals splashed up into them?
Data that refers to the characteristics of what we are observing is
Qualitative Data
A __________________ is different from the elements that it is composed of, but a ____________________ may have properties similar to the pure substances that form it.
Compound and Mixture
Which subatomic particle do we use in order to make the atomic number (The atomic number equals the number of this particle)?
Proton
True or False: When working with chemicals, it is the best practice to smell the chemicals directly, rather than wafting them towards you
False