Lab Safety
Lab Equipment
Scientific Processes
Characteristics of Life
Chemistry
100
If you are injured during a lab, what is the first things you should do?
Tell the teacher
100
Which piece of equipment would you use to measure the mass of an object?
Balance (electric or triple-beam)
100
Generally after developing a hypothesis, the next step is to
perform an experiment
100
All living things are made of _
cells
100
The part of an atom that has a positive charge
Proton
200
During a lab, long hair should be
tied up, away from face
200
What piece of equipment is this?
Graduated Cylinder
200
The variables that are kept the same in an experiment are called the
constants (or controlled variables)
200
Which of the following is NOT a characteristic of life?
Using energy, eating food, responding to stimuli
eating food
200
The nucleus (center) of an atom contains
protons and neutrons
300
Why must you wear googles at all times during a lab when instructed?
to protect your eyes from debris and chemicals
300
If you were pouring a liquid from a beaker, what piece of equipment would you use to help?
Funnel
300
The independent variable in the graph is the
Time of incubation
300
The ability of a living orangism to mainain relatively stable internal environment is ___
homeostasis
300
An atom that has lost or gained an electron
ion
400
When you are heating a substance in a test tube, the test tube should be
pointed away from people
400
The units you use to measure liquids in science is
liters, milliliters
400
The dependent variable in the graph below is
number of bacteria
400
Dolphins are streamlined, have flippers, and breath out of the top of their heads. This is an example of ___
adaptation
400
The type of bond in which atoms share electrons equally
non-polar covalend
500
If you need to smell a chemical you should...
hold the container away from your nose and waft
500
Instead of using inches to measure distance, in science we use
grams, milligrams, kilograms
500
'If I leave milk out of the refridgerator, then it will grow bacteria.' This is an example of
a hypothesis
500
Bacteria divide rapidly in proper conditions. This is an example of
reproduction
500
The type of bond in which atoms share electrons unequally
polar covalent
600
What number should you dial first if there is an emergency in the classroom?
0
600
The lab equpment show here is
an erlenmeyer flask
600
Which of the following is NOT part of the scientific process?
1. Make an observation
2. Declare results a proven theory
3. Communicate results to scientific community
4. Identify a problem
2. Declare results a theory
600
Why are viruses not considered living organisms?
They do not meet all 8 characteristics of life (cannot reproduce, use energy, made from cells, grow & develop)
600
An ionic bond occurs when
One atom donates an electron to another electron so the electrons become charged. Positive is attracted to negative.
700
If you get a chemical splash in your eye, you should immediately
flush your eyes under water for at least 15-20 minutes
700
What is the volume of the liquid shown here? (units required)
3.7 ml
700
A scientist hypothesizes that the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The independent variable is
the temperature
700
Which characteristic of life explains why birds fly south for the winter?
They are responding to their environment
700
Why is water considered a polar molecule?
The oxygen pulls the electrons away from the hydrogens