Maya designed an experiment to answer the following question:
How does the amount of water given to a lima bean seed affect how tall it grows?
Maya’s Experiment Plan:
1. Place three lima beans in three different containers with the same amount of soil.
Label the containers “A”, “B”, and “C”.
2. Place the containers on a windowsill will so they will receive the same amount of light.
3. Provide Container A with 1 ml of water each day, Container B with 5 ml of water each day, and Container C with 10 ml of water each day. Observe, measure, and record growth every day.
What is the independent variable for this experiment?
Identify two measurement tools needed for this experiment.
Identify at least 3 constants or controlled variables for this experiment.
Write a hypothesis for this experiment.
How can Maya increase the reliability of her results?
Anthony designed an experiment to answer the following question:
How does the temperature of water affect the time it takes for a sugar cube to dissolve?
Anthony’s Experiment Plan:
1. Heat 200 ml of water using a hot plate. Remove from heat when the temperature reaches 50 degrees Celsius.
2. Measure 200 ml of room temperature water from the sink.
3. Set up 2 beakers, one with warm water and one with room temperature water.
4. Drop a sugar cube in each at the same time.
5. Start the timer and begin stirring.
6. Record how long it takes for each sugar cube to completely dissolve.
7. Repeat steps 1-6 two more times.
What safety precautions should Anthony take?
Xavier’s team designed an experiment to answer the following question.
How does the surface of a ramp affect how far a toy car rolls?
Xavier’s Team’s Experiment Plan:
1. Set up two ramps that are the same height and length. One ramp is covered in sandpaper and the other is covered with smooth poster board.
2. Release the toy car at the top of the ramp with sandpaper, measure how far the car rolled from the end of the ramp, and record data.
3. Release the toy car at the top of the ramp with poster board, measure how far the car rolled from the end of the ramp, and record data.
4. Complete steps 2 and 3 two more times.
What is the independent variable?
What is the independent variable?
What is the dependent variable?
What is the purpose of Step 7?
Identify three measurement tools needed for this experiment.
What is the dependent variable?
What unit of measurement should the team use to measure how far the car rolled?
What information should be included in the data table?