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WorksheetsEXPERIMENTAL CHEMISTRY
Total questions: 63
Worksheet time: 33mins
Air hole closed means __________ safety flame and air hole open means _________ heating flame.
Yellow, blue
Blue, yellow
Blue, orange
Yellow, green
During an experiment, a bunsen burner is placed on:
Gauze mat
The laboratory bench
A heatproof mat
Tripod
The different parts of a bunsen burner include:
Barrel, collar, air hole, gas hose and base
Barrel, collar, air vent, gase hose and base
Barrel, collar, air vent, gas hose and bottom
Barrel, neck, air hole, gas hose and base
When heating a test tube you.....
Wear safety goggles, use a test tube holder and hold the test tube away from you
Wear safety goggles, use tongs and hold the test tube close to you
Wear safety goggles, use a test tube holder and make sure the flame is only yellow
Wear safety goggles, use tongs and hold the test tube away from you
When you first light a bunsen burner, the flame should be:
Yellow
Blue
Either
Non existent. You shouldn't be using a bunsen burner to light things in the lab
A gauze mat.....
Protects the tripod
Distributes heat evenly
Protects the laboratory bench
Wraps around a test tube to cool it down
When you lift a bunsen burner, you hold it from the:
Barrel
Gas hose
Base
Collar
The hottest part of a flame is _________ degrees celsius.
150
15
15000
1500
A mixture of __________ and __________ burn at the top of the barrel to produce a flame
Air, carbon dioxide
Gas, carbon dioxide
Gas, air
Air, helium
Kai, Elijah, and Arjun are having a science experiment. They need to use a bunsen burner. What should they put under the bunsen burner before they start?
heat proof mat
gauze mat
tripod
peg
Ava, Aiden, and Isla are in a science lab. They are about to perform an experiment that requires the use of gas. When should they turn on the gas?
As soon as they enter the lab
Before they light the match
After they have lit the match and are holding it above the barrel
At the end of the prac
Imagine Benjamin and Kai are in a science lab, ready to light up the bunsen burner for an exciting experiment. Zoe asks, 'What should they do with the airhole before lighting the bunsen burner?'
Open it
Close it
Zoe, Aria, and William are having a debate. Zoe says the yellow flame is the safety flame because it's easier to see and less hot than the blue. Aria thinks it's because it's easier to see and more hot than the blue. Who do you think is correct?
Zoe's argument: It is easier to see and less hot than the blue
Aria's argument: It is easier to see and more hot than the blue
Imagine Avery, James, and Arjun are in a science lab. They are experimenting with heating elements and suddenly they divert their attention away from what they are heating. What should they do next?
Close the airhole, so the yellow safety flame reappears
Open the airhole
Ensure the flame is blue
Nothing - it will be fine
Lily, Hannah, and Samuel are in the science lab. They've just finished an experiment and it's time to clean up. How should they turn off the bunsen burner?
Turn off the gas
Unplug it from the wall
Blow it out like a birthday candle
Just walk away and let it burn
Chemistry is the branch of science which is based on ___________________________
observation
experiments
none
observations help us to draw
scientific notations
scientific conclusions
both
Test tubes are made of
glass
pyrex glass
none
Test tube holder are used to
hold test tube
hold test tubes while they are heated up
none
Supports the apparatus during experiments
tripod stand
tripot stand
none
________________quantities of chemicals should be used.
small
large
very small
this equipment name is . . . .
tongs
spatulas
iron stands
clamps
this equipment name is . . . .
beakers
erlenmeyer flasks
watch glass
petri dishes
this equipment name is . . . .
beakers
conical flasks
watch glass
petri dishes
this equipment name is . . . .
beakers
erlenmeyer flasks
watch glass
petri dishes
this equipment name is . . . .
beakers
erlenmeyer flasks
watch glass
petri dishes
this equipment name is . . . .
volumetric flasks
volumetric pipettes
graduated pipettes
graduated cylinders
this equipment name is . . . .
volumetric flasks
volumetric pipettes
graduated pipettes
graduated cylinders
this equipment name is . . . .
tongs
spatulas
iron stands
clamps
Chemistry is the branch of science which is based on ___________________________
observation
experiments
none
Test tubes are made of
glass
pyrex glass
none
Most of the laboratory apparatus are made of glass
it is transparent material
with stand high temperature
both
Apparatus used for heating small quantity of chemicals
Beaker
Flask
Test tube
Gas jar
Mention the use of this apparatus
For keeping the test tube
For supporting the apparatus during heating
For drying other apparatus
Used as a shelf
Which laboratory apparatus would you use to measure 75ml of water accurately?
What laboratory equipment are you going to use if you want to pour liquids into containers with small openings?
test tube
evaporating dish
glass funnel
Which of the following pieces of chemistry lab equipment is used for pouring substances into a container without spilling?
Funnel
Beaker
Crucible
Erlenmeyer Flask
Bunsen burner
Which of the following pieces of chemistry lab equipment produces a flame from gas that is used for heating substances?
Bunsen burner
Beaker
Crucible
Erlenmeyer Flask
Funnel
What is a mortar and pestle used for?
Crushing and grinding solids into a powder
Scooping up solids such as powder
Cleaning out test tubes
Supporting a beaker or flask when heating
True or False - The scientific method is a method scientists use to conduct an investigation.
True
False
The first step of the scientific method is to
Test your Hypothesis
Draw Conclusions
Make Observations
Ask a Question
This step of the scientific method is about things you notice about the world around you. Things you see, notice, watch, listen to, or look at.
Form a Hypothesis
Draw Conclusions
Test a Hypothesis
Make Observations
How do scientists develop the questions they ask when using the Scientific Method?
Their observations lead them to generate questions
They find a question in a book
They do a lot of research
True or False - Questions used in the Scientific Method must be something that can be measured in some way.
True
False
A prediction, suggested solution, possible explanation, or theory is known as what step in the Scientific Method?
Ask a question
Form a Hypothesis
Test a Hypothesis
Analyze Results
Check off the different ways Scientists can test their hypothesis.
Conduct an experiment
Make a model
Observe something happening
Conduct Research
What are you trying to determine when you analyze your results?
If your hypothesis was correct or incorrect
If you asked a good question
If you will win an award for your work
If you received an A+ on a lab
Making a statement, making sure you answered the question, sharing information, and asking more questions are examples of what step in the Scientific Method?
Form a Hypothesis
Make Observations
Test your Hypothesis
Draw Conclusions
1. Materials made of iron mixed with other materials in a mixture can be separated using this method. What is it?
A. sieving
B. sedimentation
C. magnetism
D. filtration
2. Which process is essential in purifying water?
A. decantation
B. distillation
C. filtration
D. evaporation
Immiscible liquids like oil and water can be separated by pouring or scooping out the topmost liquid. This process is called _______.
A. distillation
B. evaporation
C. filtration
D. decantation
4. Evaporation is used to _______.
A. obtain the solute from the solution
B. separate solids of different particle size
C. separate the dyes in a marker
D. separate liquids of different boiling points
5. Which mixtures CANNOT be separated through picking?
A. grains and mongo seeds
B. sliced fruits
C. oil and vinegar
D. nails and pins
6. This process involves separating solid particles from a liquid substance using a piece of cloth.
A. decantation
B. filtration
C. evaporation
D. using a magnet
7. To separate rocks into different sized particles for road building and other construction projects, which method is applicable?
A. sieving
B. winnowing
C. picking
D. threshing
8. What is winnowing?
A. It is the process of freeing (grain) from the lighter particles of chaff, dirt, etc.
B. Is used to separate smaller solid particles from larger solid particles.
C. Picking of small particles to larger
D. Both B and C
9. Kidneys clean our blood through which process?
A. distillation
B. evaporation
C. . decantation
D. filtration
10. What is the process by which water changes from a liquid to gas or vapor?
A. filtration
B. evaporation
C. mixture
D. decantation
11. What is the appropriate method to use to separate needles in a box of beads?
sieving
decantation
using magnet
threshing
12. What is the appropriate method to obtain freshly squeezed coconut milk ?
evaporation
filtration
decantation
distillation
13. What is the appropriate method to separate rice and water?
evaporation
filtration
decantation
distillation
14. In the distillation apparatus shown, what are the parts labeled as A and B?
A. A - funnel and B - thermometer
B. A – thermometer and B - funnel
C. A – condenser and B - thermometer
D. A – condenser and B - flask
15. What is the method used to obtain gasoline?
A. distillation
B. evaporation
C. decantation
D. filtration
