lab safety Quiz
What angle should you keep a test tube away from you as it heats?
90 degrees
Identify the six steps of the scientific method, in order:
First:Ask a Question
Second:Do research
Third:Form a hypothesis
Fourth:Test the Hypothesis
Fifth:Review the data
Sixth:Share your results
What is an ion, as per our notes?
An atom that carries an electrical charge
True or False: Every compound is exactly the same as each individual element it contains
false
When taking recently heated glassware, you should clean it in:
warm water
How long should you cleanse out your eyes after getting chemicals splashed up into them?
20 minutes
Data that refers to the characteristics of what we are observing is:
Qualitative Date
In the picture bellow, the Atom on the left is gaining two electrons. What will happen to its charge?
Its charge will become more negative
A pure substance is matter that has fixed composition and definite properties. Is apple juice a pure substance?
no
True or False: A Cation is an ion with a positive charge.
True
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 Data
A _________ is the smallest whole particle of matter
Atom
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
Which subatomic particle has a neutral charge?
Nuetron
True or False: When disposing of chemicals, it is proper procedure to pour all unused chemicals down the drain.
False
A variable that stay the same regardless of what else you are changing is a __________ variable.
Controlled
Which subatomic particle do we use in order to make the atomic number?
Proton
A _______________ is a substance that cannot be separated or broken down into simpler substances by chemical means
Element
A variable that is changed by you in the experiment, meaning this is what you are changing each time you do a trial, is a _____________ variable.
Independent
Which situation would the power shower come in handy?
A piece of clothing has caught on fire
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
Which subatomic particle orbits the nucleus?
Electron
Look at the following: FeCl₃ . How many atoms are present for each of the elements listed?
Fe: 1, Cl: 3
A ____________ is a substance made of atoms of two or more different elements that are chemically combined
Compound