Bio W3 10A

​BIOLOGY-10A

By Ifa Muzdalifah

​Review: Checking Understanding of The Previous Lesson

Open Ended

A student wants to investigate the effect of sunlight on the rate of photosynthesis in pondweed. She places the pondweed at different distances from a lamp and counts the number of bubbles produced per minute.

Write down the hypothesis for this experiment?

Open Ended

Students want to know if the type of soil affects how fast a plant grows. They plant the same type of seed in sandy soil, clay soil, and loamy soil. All pots are given the same amount of water, kept in the same location, and measured for height weekly over a month.

Answer

• Independent variable:
  Type of soil (sandy, clay, loamy)

• Dependent variable:
  Growth of the plant (measured by height)

• Two controlled variables:

  1. Amount of water given to each plant

  2. Type of seed used
     

     (Other acceptable answers: same pot size, same amount of light, same temperature, same measurement interval)

Multiple Choice

Which of the following is an example of qualitative data collected during a biology experiment?

• Measurements of the height of plants.The height of a plant in centimeters
  

• The number of bubbles produced by pondweed per minute

• Observations of the color and behavior of organisms.

  The time taken for a leaf to decolorize in ethanol

• The color change of a solution from blue to orange when testing for sugar

Multiple Choice

Which of the following is an example of quantitative data collected in a biology experiment?

• The smell of decaying leaves in different environments
  

• The color of flowers observed in a field study

• The number of heartbeats per minute after exercise

• The texture of fruit skin described as smooth or rough

Multiple Choice

A student is investigating how temperature affects enzyme activity. She needs to accurately measure the temperature of the water bath during the experiment.

• Use a digital clock to track the time.
• Measure the temperature with Measuring cylinder

• Estimate the temperature based on the room temperature.
• Use a calibrated thermometer to measure the water bath temperature.

Open Ended

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