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Worksheets25-26: TEST #1 REVIEW
Total questions: 81
Worksheet time: 3hrs 36mins
The following footwear is mandatory in the laboratory ________.
Sandals.
Open shoes.
Closed shoes.
Weather-appropriate shoes.
During a chemistry experiment in the school laboratory, Jane realized that her long hair should be ____________.
tied back
cut
loose
curly
(True or False) horseplay is allowed in the laboratory
true
false
Approved eye protection devices (such as goggles) are used in the laboratory
to prevent eye strain
to improve your vision
to make you look super cool
whenever chemicals, heat, or glassware are used
In a high school chemistry lab, students are learning about different chemicals. The teacher instructs them that the proper technique for smelling chemicals is ______________
hold your nose close to the glass containing the chemical
waft the chemical towards your nose
smell only a small amount of the chemical
Trick question; students should never smell chemicals in class
Click on the image to zoom in: Imagine you are in a chemistry lab. You see a group of students conducting experiments. Which student is following all the lab safety rules?
H
A
E
G
D
When is it okay to eat or drink at the lab tables?
Always
Only during group work, not during labs
Never, unless my teacher explicitly tells me it is ok
Whenever I'm hungry
In the laboratory, you should NEVER
taste substances being used
wear your glasses
tie your hair if it is long
wear closed shoes
While conducting an experiment with acids and bases, you accidentally splash acid all over your face. What safety equipment should you use immediately?
fire blanket
fire extinguisher
eyewash station
safety shower
Practical jokes or pranks in the laboratory are
okay if you are working alone
not dangerous
okay
always against the rules
What is Fredy doing wrong in this image?
drinking from glassware
horseplaying
setting something on fire
stealing
What is Lindsey doing wrong?
not paying attention
not wearing glasses
long and loose hair
all of these
What is Savannah doing wrong in this image?
drinking poison
not wearing safety glasses
not wearing gloves
all of these
It is okay to play around in the lab as long as you have finished your experiment.
true
false
Which of these is an acceptable outfit in the laboratory?
shorts, tank top, and sandals
jeans, crop top, and dangling jewelry
long pants, sneakers, lab coat, and safety glasses
glasses, loose long hair, and tank top
The laboratory equipment seen in the image should be used during a laboratory investigation when...
glassware is used.
chemicals are used.
heat/fire is used.
any of the above is used.
To avoid dangerous fumes, the student should _______ the smell towards their nose.
blow
waft
raft
stir
(True or False) It is okay to pick up broken glass with bare hands as long as it is placed in the trash can
true
false
funnel
test tube
balance
forceps
funnel
forcepts
pinch clamp
graduated cylinder
hat rack
scale
thingamabob
test tube rack
What is this?
hot plate
thermometer
bunsen burner
beaker
What is this?
test tube brush
ruler
forceps
test tube
What is this?
pipette
scoopula
thermometer
pestle
Match the following
test tube clamp
forceps
beaker tongs
crucible tongs
test tube tongs
Label the pieces of lab equipment with the correct name:
spot plate (well plate)
mortar & pestle
watch glass
evaporating dish
Identify the graduated cylinder:
Identify the beaker:
Identify the erlenmeyer flask:
Match the following
wash bottle
ring stand
pipette
wire gauze
ring clamp
Which of the following is an example of a number written in scientific notation?
3.45
3.45 x 104
345 x 102
3.45 x 102
When a piece of aluminum foil is taken out of the oven and cools from 125° C to 53°C, What is the change in temperature?
72°C
178°C
125°C
53°C
How would you write 36,820,000 in Scientific Notation?
How would you write 0.0023 in Scientific Notation?
Match the number in standard notation to it's match in scientific notation:
3.5 x 103
3,500
3.5 x 10-3
0.0035
3.5 x 107
35,000,000
3.5 x 10-7
0.00000035
3.5 x 100
3.5
Match the type of energy to the correct example:
coal
chemical potential energy
fuel burning
thermal energy
charged particles
electrical energy
radio
sound energy
runner
kinetic energy
When you take the temperature of a substance, what are you really measuring?
the average kinetic energy of ALL of the molecules
the kinetic energy of ONLY the fastest molecule
the kinetic energy of ONLY the slowest molecule
the average kinetic energy of ONLY the fast molecules
What is the energy that objects in motion have (in other words, motion energy)?
potential energy
kinetic energy
electrical energy
stored chemical energy
What type of energy is this:
light
chemical
nuclear
potential
What type of energy is this:
thermal
kinetic
electrical
sound
What type of energy is this:
elastic
electrical
chemical
light
What type of energy is this:
stored chemical
electrical
thermal
light
When an object is at rest, not moving, what type of energy does it have?
potential
kinetic
chemical
thermal
Which is the best example of something that has kinetic energy?
a basketball rolling across a court
a car parked on a steep hill
a picture hanging on the wall
a piece of wood before it's burned
Match the following forms of energy.
Sound
Electric
Mechanical
Thermal
The person in the picture threw a ball. The energy was ____
transformed from motion to motion
created by the human
created inside the ball
transferred from the human to the ball
What energy takes place when you use a fan?
Electical to Mechanical, Sound, and Thermal
Mechanical to Electrical, Sound, and Thermal
Electrical to Sound and Radiant
Radiant to Sound and Electrical
In the evening/night, Anthony used a flashlight to go on a walk with his family. Sadly, he forgot to turn the flashlight off. In the morning, his father said, "The flashlight has a dead battery now. We need to replace it."
This means the energy that was stored in the battery -
Disappered into nowhere
Was destrogy
Was changed into other forms of energy
Was used to create a new forms of energy
Select which order the words goes into the blanks.
Energy can not be _____ or destroyed. Energy can only be ________
Created and Transformed
Transformed and Created
Which will heat up faster?
copper
granite
iron
basalt
Which will heat up slower?
water
lead
granite
iron
Which of the following best explains why the sand at the beach is hotter than the water?
Sand has a higher specific heat than water.
Sand has a lower specific heat than water.
There is more water than sand at the beach.
There is more sand than water at the beach.
The specific heat of platinum is 0.133 J/g°C. How much heat(Q) is released when a 10 g piece of platinum cools from 100°C to 50°C?
66.5 J
665 J
0.0266 J
0.665 J
Which material heats up quickest?
Aluminium
Concrete
Diamond
Glass
Water
Which material heats up slowest?
Aluminium
Concrete
Diamond
Glass
Water
How much energy must be absorbed by 20.0 g of water to increase its temperature from 283 °C to 303 °C? (Cp of H2O = 4.184 J/g °C)
Q = (a)
When 15.0 g of steam drops in temperature from 275°C to 250°C, how much heat energy is released? (Cp of H2O = 4.184 J/g °C)
Q = (a)
What temperature change will a 50.0 g piece of glass raise if it absorbs 5275 joules of heat, and its specific heat capacity is 0.50 J/g°C? The initial temperature of the glass is 20.0°C.
ΔT = (a)
If a 150.0 g sample of chloroform absorbs 1000 joules of heat, and the specific heat of chloroform is 0.96 J/g°C, what is its temperature change?
ΔT = (a)
The temperature of a 6.0 g sample of glass changed from 20.0°C to 45.0°C when it absorbed 550 J of heat. What is the specific heat of this glass?
0.27 J/g °C
3.7 J/g °C
130 J/g °C
12 J/g °C
If 500 J of heat is added to a 2 kg block of metal, causing its temperature to increase from 5°C to 10°C, what is the specific heat capacity of the metal?
25 J/kg°C
50 J/kg°C
100 J/kg°C
200 J/kg°C
Which of the following best describes the concept of heat transfer in thermodynamics?
The movement of particles from one place to another
The transfer of energy due to temperature difference
The conversion of mass into energy
The increase in volume due to pressure
If a substance has a high specific heat capacity, what does this imply about its ability to change temperature?
It changes temperature easily.
It resists temperature change.
It cannot change temperature.
It changes temperature randomly.
Why is water often used as a coolant in engines and other machinery?
Water is not flammable and can withstand high temperatures
Water is a good conductor of electricity
Water is readily available and inexpensive
Water has a high specific heat capacity so it can absorb a lot of heat from the machine
An object heats up from 35 to 65 degrees, what is the temperature change?
35 degrees
65 degrees
30 degrees
100 degrees
Suppose we have a quantity of molten glass that absorbs 75000. Joules of heat, and its temperature increases by 25.0°C. The specific heat capacity of glass is approximately 0.840 J/g°C. What is the mass of the molten glass?
(a)
Imagine a piece of steel absorbs 40000. Joules of heat, and as a result, its temperature increases by 50.0°C. The specific heat capacity of steel is approximately 0.490 J/g°C. What is the mass of this piece of steel?
(a)
