Lab Safety
What are two protective items required each time you enter a lab area?
Eye protection and gloves
A variable changed by you in an experiment is a _______ variable
Independent
Which subatomic particle do we use in order to make the atomic number
Proton
How many atoms are present for each of the elements listed? FeCl₃
Fe: 3 Cl: 1
True or False: Every compound is exactly the same as each individual element it contains
False
How long should you cleanse out your eyes after getting chemicals splashed up into them?
20 minutes
Data that refers to the numerical values of what we are observing is
Quantitative data
Which subatomic particle has a neutral charge?
Nuetron
When substances are evenly distributed and the mixture is the same throughout they form a _______________________
Homogenous mixture
Define Mass
a coherent, typically large body of matter with no definite shape.
True or False: When working with chemicals, it is best to practice to the smell the chemicals directly, rather than wafting them towards you
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
Matter is anything that has ____________ and takes up ________________
Mass, Space
A __________ is the smallest unit of a substance that keeps all of the physical and chemical properties of that substance
Molecule
Should you put up you hair before a science experiment?
Yes
What angle should you keep a test tube away from you as it heats?
45 degrees
A variable that stays the same regardless of what you are changing is a _____ variable
Controlled
A_____ is the smallest whole particle of matter
Atom
A ____________ is a substance made of atoms of two or more different elements that are chemically combined
Compound
Should you wear open toed shoes to a science experiment?
No
When taking recently heated glassware, you should clean it in...
Warm water
What is the first step of the scientific method
Ask a question
The atomic mass is made up of combining which two subatomic particles?
Protons & Neutrons
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, Mixture
Define a mixture
a substance made by mixing other substances together.