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The instructions for how to carry out a science experiment can be found in an experimental protocol.
An experimental protocol often includes the list of materials you need for the experiment.
The protocol also includes the procedure, which is a list of steps for carrying out the experiment.
Some experimental protocols include data tables for recording the results of the experiment.
The experimental protocol below is for an experiment testing how quickly food coloring mixes with water.
When food coloring is added to water, the particles of food coloring will spread throughout the water in a process called diffusion.
Read the experimental protocol. Then answer the question below.
Materials:
2 identical glass beakers
hot water (45°C)
cold water (5°C)
blue food coloring
2 stopwatches
Procedure:
Pour 200 milliliters of hot water in one beaker.
Pour 200 milliliters of cold water in the other beaker.
Put three drops of food coloring into each beaker.
Measure how long it takes the food coloring to spread evenly throughout the water in each beaker.
Record the times in the data table.
Clean the beakers.
Repeat steps 1 through 6 two more times.
Data table:
Diffusion time in seconds Trial 1 Trial 2 Trial 3 beaker with hot water beaker with cold water
Which materials are required for this experiment? Select all that apply.
Look again at the experimental protocol. Then answer the question below.
Materials:
2 identical glass beakers
hot water (45°C)
cold water (5°C)
blue food coloring
2 stopwatches
Procedure:
Pour 200 milliliters of hot water in one beaker.
Pour 200 milliliters of cold water in the other beaker.
Put three drops of food coloring into each beaker.
Measure how long it takes the food coloring to spread evenly throughout the water in each beaker.
Record the times in the data table.
Clean the beakers.
Repeat steps 1 through 6 two more times.
Data table:
Diffusion time in seconds Trial 1 Trial 2 Trial 3 beaker with hot water beaker with cold water
What data are being collected and recorded in the table?
Look again at the experimental protocol. Then answer the question below.
Materials:
2 identical glass beakers
hot water (45°C)
cold water (5°C)
blue food coloring
2 stopwatches
Procedure:
Pour 200 milliliters of hot water in one beaker.
Pour 200 milliliters of cold water in the other beaker.
Put three drops of food coloring into each beaker.
Measure how long it takes the food coloring to spread evenly throughout the water in each beaker.
Record the times in the data table.
Clean the beakers.
Repeat steps 1 through 6 two more times.
Data table:
Diffusion time in seconds Trial 1 Trial 2 Trial 3 beaker with hot water beaker with cold water
Which variables are held constant in this experiment? Select all that apply.
Hint: Variables that are held constant are kept the same.
Look again at the experimental protocol. Then complete the question below.
Materials:
2 identical glass beakers
hot water (45°C)
cold water (5°C)
blue food coloring
2 stopwatches
Procedure:
Pour 200 milliliters of hot water in one beaker.
Pour 200 milliliters of cold water in the other beaker.
Put three drops of food coloring into each beaker.
Measure how long it takes the food coloring to spread evenly throughout the water in each beaker.
Record the times in the data table.
Clean the beakers.
Repeat steps 1 through 6 two more times.
Data table:
Diffusion time in seconds Trial 1 Trial 2 Trial 3 beaker with hot water beaker with cold water
Complete the following statement.
In this experiment, the temperature of the water is variable.
The time it takes the food coloring to spread evenly throughout the water is variable.
Look again at the experimental protocol. Then answer the question below.
Materials:
2 identical glass beakers
hot water (45°C)
cold water (5°C)
blue food coloring
2 stopwatches
Procedure:
Pour 200 milliliters of hot water in one beaker.
Pour 200 milliliters of cold water in the other beaker.
Put three drops of food coloring into each beaker.
Measure how long it takes the food coloring to spread evenly throughout the water in each beaker.
Record the times in the data table.
Clean the beakers.
Repeat steps 1 through 6 two more times.
Data table:
Diffusion time in seconds Trial 1 Trial 2 Trial 3 beaker with hot water beaker with cold water
Which question can this experiment answer?
The instructions for how to carry out a science experiment can be found in an experimental
protocol.
An experimental protocol often includes the list of materials you need for the experiment. The protocol also includes the procedure, which is a list of steps for carrying out the experiment. Some experimental protocols include data tables for recording the results of the experiment.The experimental protocol below is for an experiment testing how quickly food coloring mixes with water. When food coloring is added to water, the particles of food coloring will spread throughout the water in a process called diffusion.
Read the experimental protocol. Then answer the question below.
Materials:
1 narrow glass container
1 wide glass container
warm water (30°C)
red food coloring
2 stopwatches
Procedure:
Pour 100 milliliters of warm water in the narrow container.
Pour 100 milliliters of warm water in the wide container.
Put two drops of food coloring into each container.
Measure how long it takes the food coloring to spread evenly throughout the water in each container.
Record the times in the data table.
Clean the containers.
Repeat steps 1 through 6 two more times.
Data table:
Diffusion time in seconds Trial 1 Trial 2 Trial 3 narrow container wide container
Which materials are required for this experiment? Select all that apply.
Look again at the experimental protocol. Then complete the question below.
Materials:
1 narrow glass container
1 wide glass container
warm water (30°C)
red food coloring
2 stopwatches
Procedure:
Pour 100 milliliters of warm water in the narrow container.
Pour 100 milliliters of warm water in the wide container.
Put two drops of food coloring into each container.
Measure how long it takes the food coloring to spread evenly throughout the water in each container.
Record the times in the data table.
Clean the containers.
Repeat steps 1 through 6 two more times.
Data table:
Diffusion time in seconds Trial 1 Trial 2 Trial 3 narrow container wide container
Complete the following statement.
Each time you repeat steps 1 through 6, you are performing a different.
Look again at the experimental protocol. Then answer the question below.
Materials:
1 narrow glass container
1 wide glass container
warm water (30°C)
red food coloring
2 stopwatches
Procedure:
Pour 100 milliliters of warm water in the narrow container.
Pour 100 milliliters of warm water in the wide container.
Put two drops of food coloring into each container.
Measure how long it takes the food coloring to spread evenly throughout the water in each container.
Record the times in the data table.
Clean the containers.
Repeat steps 1 through 6 two more times.
Data table:
Diffusion time in seconds Trial 1 Trial 2 Trial 3 narrow container wide container
During each trial, which of the following should you do before starting the stopwatch? Select all that apply.
Look again at the experimental protocol. Then answer the question below.
Materials:
2 large glass flasks
9 identical glass beakers
9 teaspoons of table salt
1 graduated cylinder
room temperature tap water
Procedure:
Measure and pour 650 milliliters of tap water into each flask. Use the graduated cylinder to measure precisely.
Add 3 teaspoons of salt to one flask and label the flask medium salinity.
Add 6 teaspoons of salt to the other flask and label it high salinity.
Swirl each flask until all the salt is dissolved.
Label three beakers very low salinity. Using the graduated cylinder, measure and pour 200 milliliters of tap water into each of these beakers.
Label three beakers medium salinity. Measure and pour 200 milliliters of the medium salinity solution into each of these beakers.
Label three beakers high salinity. Measure and pour 200 milliliters of the high salinity solution into each of these beakers.
Place all of the beakers next to each other in a warm, sunny area.
After three days, use the graduated cylinder to measure the amount of water remaining in each beaker.
Record your results in the data table.
Data table:
Volume of water (mL) remaining in each beaker after 3 days very low salinity medium salinity high salinity
Why does the data table have three boxes to fill in for each water salinity level?
Look again at the experimental protocol. Then answer the question below.
Materials:
2 large glass flasks
9 identical glass beakers
9 teaspoons of table salt
1 graduated cylinder
room temperature tap water
Procedure:
Measure and pour 650 milliliters of tap water into each flask. Use the graduated cylinder to measure precisely.
Add 3 teaspoons of salt to one flask and label the flask medium salinity.
Add 6 teaspoons of salt to the other flask and label it high salinity.
Swirl each flask until all the salt is dissolved.
Label three beakers very low salinity. Using the graduated cylinder, measure and pour 200 milliliters of tap water into each of these beakers.
Label three beakers medium salinity. Measure and pour 200 milliliters of the medium salinity solution into each of these beakers.
Label three beakers high salinity. Measure and pour 200 milliliters of the high salinity solution into each of these beakers.
Place all of the beakers next to each other in a warm, sunny area.
After three days, use the graduated cylinder to measure the amount of water remaining in each beaker.
Record your results in the data table.
Data table:
Volume of water (mL) remaining in each beaker after 3 days very low salinity medium salinity high salinity
What data are being collected and recorded in the table?
Look again at the experimental protocol. Then complete the question below.
Materials:
2 large glass flasks
9 identical glass beakers
9 teaspoons of table salt
1 graduated cylinder
room temperature tap water
Procedure:
Measure and pour 650 milliliters of tap water into each flask. Use the graduated cylinder to measure precisely.
Add 3 teaspoons of salt to one flask and label the flask medium salinity.
Add 6 teaspoons of salt to the other flask and label it high salinity.
Swirl each flask until all the salt is dissolved.
Label three beakers very low salinity. Using the graduated cylinder, measure and pour 200 milliliters of tap water into each of these beakers.
Label three beakers medium salinity. Measure and pour 200 milliliters of the medium salinity solution into each of these beakers.
Label three beakers of high salinity. Measure and pour 200 milliliters of the high salinity solution into each of these beakers.
Place all of the beakers next to each other in a warm, sunny area.
After three days, use the graduated cylinder to measure the amount of water remaining in each beaker.
Record your results in the data table.
Data table:
The volume of water (mL) remaining in each beaker after 3 days very low salinity medium salinity high salinity
Complete the following statement.
In this experiment, the salinity of the water added to each beaker is the variable.
The amount of water remaining after three days is the variable.
