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WorksheetsLab Safety & Variables Review
Total questions: 80
Worksheet time: 1hrs 20mins
Before starting an investigation or lab procedure, you should
try an experiment on your own
open all containers and packages
read all directions and make sure you understand them
handle all the equipment to become familiar with it
When pouring liquids between containers, you should hold the containers over
the floor or a waste basket
a fire blanket or oven mitt
an eyewash station or a water fountain
a sink or your work area
If you get hurt or injured in any way, you should
tell your teacher immediately
find bandages or a first aid kit
go to the principal's office
get help after you finish the lab
If your glassware is chipped or broken, you should
use it for only solid materials
give it to your teacher
put it back in the materials area
increase the damage so that it is obvious
If you have unused liquids after finishing your procedure, you should
mix them together in a bucket
put them back into their original containers
put them away where your teacher tells you to put them
If electrical equipment has a cord or plug that appears damaged, you should
unplug the equipment by pulling on the cord
let the cord hang over the side of a counter or table
tell your teacher about the problem immediately
wrap tape around the cord to repair it
If you need to determine the odor of a chemical or a solution, you should
use your hand to bring fumes from the container to your nose
bring the container under your nose and inhale deeply
tell your teacher immediatly
When working with materials that might fly into the air and get into your eyes or someone else's eyes, you should wear
goggles
an apron
gloves
a hat
Before doing experiments involving a heat source, you should know the location of the
door
windows
fire extinguisher
overhead lights
When working with a flame or heat source, you should
tie back long hair that hangs in front of your eyes
heat substances or objects inside a closed container
touch an object with your bare hand and see how hot it is
throw hot objects into the trash when you are done with them
As you cut with a knife or other sharp instrument, you should move the instrument
towards you
away from you
vertically (up and down)
Goofing around in the lab is acceptable
True
False
When heating a test tube, it is important to point the test tube
towards your partner
towards yourself
away from you and others
downward
When working with an open flame, you should not reach over it or
keep it near flammable liquids
leave it unattended
David wears glasses. What does David need to do before a lab with fire and chemicals?
clean his eyeglasses
nothing, the eyeglasses offer enough protection
wear safety goggles over the glasses
wear safety goggles in his hair
How should long hair be worn in the lab?
curly and down
tucked under a lab coat
tied back with a rubber band
hidden with a hat
Safety goggles should be worn when working with what?
fire and chemicals
glassware
What type of shoes should you wear in a lab?
flip flops
purple pumps
closed toed shoes
none, go barefoot
If you do not understand a step in the lab procedure, what should you do?
walk across the room and ask another lab group
try different methods until you get it right
ask the teacher
Paula was not careful and knocked over a beaker. She notices a small chip in the glass. What should Paula do?
Ignore the situation. A small chip will not hurt anybody.
Finish what she was working on and then tell the teacher.
Inform the teacher immediately.
What is mass?
how much matter "stuff" is inside an object
the pull of gravity
length, width, heighth
an estimation
Which quantity is measured using this tool?
weight
mass
volume
length
What is this tool used for?
to find the temperature of a substance
used to stir liquids
used to find the mass
used to add drops of liquid
The density of an object is used to determine if an object will float or sink?
True
False
The density of an object can be determined by....
dividing the mass by it's volume (D=m/v)
dividing the volume by it's mass (D=v/m)
multiplying the volume by it's mass (D=V x m)
multiplying the mass by it's volume (D=m x V)
An electronic device for solving mathematics problems.
microscope
meter stick
calculator
hand lens
A lab tool used to heat substances.
Metric Ruler
Graduated Cylinder
Hot Plate
Thermometer
What safety equipment should you wear to protect your clothes?
goggles
gloves
apron
When should I wash my hands?
After reading the instructions
After turning on a burner
After high fiving my friends
After I finish a lab
What is this tool?
florence flask
erlenmeyer flask
microscope slide
cover slip
Name the tool.
bunsen burner
test tube holder
battery
test tube rack
This tool is a gas burner that produces a flame.
bunsen burner
cover slip
erlenmeyer flask
hand lens
Name this tool.
florence flask
erlenmeyer flask
beaker
graduated cylinder
This tool is a cell that furnishes an electric current.
medicine dropper/pipette
cover slip
test tube
battery
This tool magnifies objects that CANNOT be seen with your eyes.
hand lens/magnifying glass
tweezers/forceps
microscope
funnel
This tool measures length.
beaker
balance
graduated cylinder
ruler
This tool is used to pour liquids and solids into a container without spilling.
funnel
beaker
test tube
thermometer
Name this tool.
tweezers/forceps
medicine dropper/pipette
microscope
cover slip
This is a glass container used to perform experiments.
balance
beaker
thermometer
test tube
This tool holds only one test tube.
test tube holder
test tube rack
florence flask
funnel
This tool is used to pick up small objects.
thermometer
safety googles
bunsen burner
tweezers/forceps
This tool measures mass.
balance
microscope
florence flask
battery
Name this tool.
beaker
florence flask
erlenmeyer flask
graduated cylinder
This tool measures and pours (the tall one).
beaker
florence flask
erlenmeyer flask
graduated cylinder
This tool protects your eyes.
hand lens
safety goggles
ruler
funnel
Name this tool.
cover slip
test tube
hand lens/magnifying glass
thermometer
Name this tool.
beaker
erlenmeyer flask
florence flask
graduated cylinder
This tool is used to cover the specimen on the microscope slide.
tweezers/forceps
cover slip
test tube rack
medicine dropper/pipette
This tool measures temperature.
test tube rack
beaker
thermometer
battery
What is the variable that scientists manipulate and test?
dependent variable
independent variable
constant
control group
Gavan throws a ball at the wall with a speed of 50 mph and it bounces back at him at 40 mph. He decides to throw the ball with a speed of 25 mph and it returns at 20 mph.
What is a possible claim he can make?
The wall is moving very fast.
His arm gets sore after throwing twice.
The higher the speed of the ball the slower it bounces back.
The higher the speed of the ball the faster it bounces back.
Research Question: Does the type of gasoline in a car affect its top speed?
Identify the dependent variable.
Type of gasoline
Type of car
Top Speed
Amount of gasoline
Does changing the scent of a brand of dog food affect how much the dog eats?
Which of these would be the control group?
beef scented
type of dog
original scented
amount of food eaten
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid.
Group A: water.
Group B: apple juice.
Group C: milk.
Each plant has the same amount of soil, sunlight, and listens to the same music.
Identify the independent variable.
The type of plant
The amount of sunlight
The type of music
The type of liquid
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid.
Group A: water
Group B: apple juice
Group C: milk.
Each plant has the same amount of soil, sunlight, and listens to the same music.
What would be in the control group?
Group A
The Plant in soil
The Plant given sunlight
The Plant that listens to music
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music.
In this investigation, what are the constants?
water, apple juice, milk
plant height
soil, sunlight, music
water, apple juice, milk, soil, sunlight, music
Joseph claims he is a better driver than Justin. Justin challenges him to a street race down IL-78. To fairly determine who the better driver is we should have _____.
Joseph drive a tractor and Justin drive a Ferrari.
Both vehicles filled with the same type of fuel.
Joseph drive in reverse while Justin drives forward.
All statements would make a fair race.
Sponge Bob wants to see if a muscle building lotion will help Patrick bulk up. He decides to rub Patrick with the special lotion for 2 weeks and have him complete a workout plan. Another starfish completes the same workout plan but uses regular lotion. After 2 weeks, Sponge Bob measures their muscles to see if the secret ingredient worked. What is the dependent variable?
Type of lotion
Muscle Growth
Second Starfish
2 week time period
How many independent variables should be tested in a controlled experiment?
one
two
three
as many as possible
An experiment should have at least ______ good trials.
one
two
three
four
What is the dependent variable being measured?
The students
The study time
The grade on the quiz
Cami estimates that she can run a mile in 9 minutes. She finishes the mile race in 8 minutes flat. What was her percent error?
17.0 %
12.5 %
11.1 %
1.0 %
None of the Above
Which evidence suggests that more studying does NOT increase a student's grade?
Carlos scored higher than Bob
Pat scored higher than Marisa
Florence scored higher than Kim
Lori scored higher than Wendy
Sponge Bob notices that his pals Gary and Pauly are suffering from slimotosis that causes a horrible odor. His friend Patrick tells him that drinking Dr. Kelp will cure the smell. Sponge Bob experiments by giving Dr. Kelp to Gary but he gives Pauly colored water to drink.
What is the independent variable being tested?
Dr. Kelp beverage
Slimotosis
The Horrible Odor
Gary
Sponge Bob notices that his pals Gary and Pauly are suffering from slimotosis that causes a horrible odor. His friend Patrick tells him that drinking Dr. Kelp will cure the smell. Sponge Bob experiments by giving Dr. Kelp to Gary but he gives Pauly colored water to drink.
Is there a placebo in this experiment?
Yes, Dr. Kelp beverage
Yes, the horrible odor
Yes, the colored water
No placebo is used.
Sponge Bob wants to see if a muscle building lotion will help Patrick bulk up. He decides to rub Patrick with the special lotion for 2 weeks and have him complete a workout plan. Another starfish completes the same workout plan but uses regular lotion. After 2 weeks, Sponge Bob measures their muscles to see if the secret ingredient worked.
What is held constant in this experiment?
Type of lotion
Muscle Growth
2 week time period
What is another name for the dependent variable?
the response variable
the placebo variable
the constant variable
the control variable
A "constant" in an experiment is __________.
always the same
always changing
another name for a control
another name for a placebo
What is the purpose of a control group?
To be used as a comparison to the experimental group
To help determine if the independent variable did have an effect
To act with a placebo to see if a psychological effect occurs
All of the Above
