Biology Skills: Reliability Part 2

This video tutorial covers the concept of reliability in scientific experiments, focusing on random errors and their impact on data consistency. It uses examples like Robin Hood's archery and mung bean seedling growth to illustrate how random errors can affect results. The video also discusses sources of random errors, including environmental conditions, experimental factors, and intrinsic variability, emphasizing the importance of understanding these factors to improve experiment reliability.

What is the primary characteristic of a reliable measurement in scientific experiments?

• It is performed quickly.

• It gives consistent results each time.

• It uses advanced technology.

• It is always accurate.

Which archer is used as an example of reliability in the video?

• William Tell

• Robin Hood

• Fluky Luke

• Katniss Everdeen

What is a random error in the context of scientific experiments?

• An error that is caused by faulty equipment.

• An error that has variable size and direction.

• An error that is always the same size.

• An error that can be easily predicted.

In the mung bean experiment, what was the controlled variable?

• The type of ruler used.

• The initial height of the seedlings.

• The amount of water given.

• The type of soil used.

What was the resolution of the wooden ruler used in the mung bean experiment?

• 5 millimeters

• 1 millimeter

• 2 millimeters

• 0.5 millimeters

Which of the following is NOT a source of random errors in biology?

• Intrinsic variability

• Experimental factors

• Environmental conditions

• Consistent methodology

What is intrinsic variability?

• Errors in measurement tools

• Variations in environmental conditions

• Inherent differences between samples

• Differences in experimental setup

How can environmental conditions introduce random errors in experiments?

• By remaining constant throughout the experiment

• By varying randomly between trials

• By being completely controlled

• By being irrelevant to the experiment

Why might identical twins have different fingerprints despite having the same DNA?

• Due to measurement errors

• Due to experimental factors

• Due to intrinsic variability

• Due to environmental conditions

What might cause one mung bean seedling to grow taller than another in the same experiment?

• Different amounts of sunlight

• Different types of soil

• Different watering schedules

• Different measuring tools