First-Hand Investigation Preparation

Question 1

What are controlled variables?

Answer 1

Keeping aspects of the experiment the same to ensure fairness.

Question 2

What is a control group?

Answer 2

What you keep the same and compare the results against.

Question 3

What is validity?

Answer 3

Whether the experiment tests what it is designed to test.

Question 4

Ways to improve or increase validity

Answer 4

• Control the variables (keeping aspects the same)
• Use a control group

Question 5

What is reliability?

Answer 5

How accurate the results are

Question 6

Ways to improve or increase reliability

Answer 6

• Repeat the experiment numerous times
• Increase the sample size

Question 7

What are the graphing skills that are being assessed?

Answer 7

Use of:

• Title
• Labelled axis (with label and units)
• Evenly spaced axis
• Key

Question 8

What aspects need to be included in a discussion?

Answer 8

• 2 to 3 paragraphs
• Talk about the results and explain why it happened
• Discuss reliability
• Discuss validity
• Discuss ways to improve (modifications)

Question 9

What are cohesive forces?

Answer 9

Attraction forces between particles

Question 10

What are adhesive forces?

Answer 10

Are between the particles and another siubstance

Question 11

What are advantages to subdermal implants?

Answer 11

• Patient does not have to remember the mediication
• Dosages are correct (no overdose)
• Last for a few months, up to 5 years

Question 12

What are disadvantages to subdermal implants?

Answer 12

• Can be visible in some patients

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Question 13

Provide an observation on the aspro clear tablet

Answer 13

Highly soluble in all substances

Question 14

Provide an observation on paracetamol tablets

Answer 14

Soluble in all substances but not as quick

Question 15

Provide an observation on the Fefol (Capsule)

Answer 15

Dissolved in all at a significantly slower rate

Question 16

Provide an observation on Mintec (enteric coated)

Answer 16

Should only dissolve in sodium hydroxide