science inquiry

Question 1

What is the best way of improving the reliability of an investigation

Answer 1

Repition and replication off for your experiment this overcomes possible uncontrolled variables

Question 2

What role does a placebo play in a scientific experiment

Answer 2

• To enable the experimental variable to be tested
• as a comparison too the variable
• reducing effect off phycological influences

Question 3

examples off controlled Variables in an experiment which should be controlled to ensure that an experiment is reliable

Answer 3

• same age range
• similar genetic factors
• same proportion of gender
• similar nutritional status
• same amount of medication
• same method of administration of medication
• similar general health

Question 4

suggest how researchers could increase validity vs the reliability off an experiment

Answer 4

validity: establish more controlled variables/improve experimental design (or any answer that should improve the design of experiment.
reliability: repeat experiment again/replicate/increase Sample size

Question 5

List the components which should be found in a graph

Answer 5

• title including the independent and dependent variables
• labelling axes with units
• using a suitable scale
• using a key
• accurately plotting points and joining them with a ruler

Question 6

fill the blanks
change off concentration ……………………….. Is important in stimulating the breathing reflex

the ……………………… Part of the brain voluntarily controls breathing

It is important for humans to have voluntary control over breathing rate because …………………………………

Answer 6

1 carbon dioxide

2 cerebral cortex

3 gives protection prevent water from entering lungs when swimming/prevent dangerous poisonous unwonted gases from entering lungs

Question 7

explain the steps of conducting an investagation

Answer 7

• problem (find the problem/ issue)
• collect information
• propose hypothesis
• test hypothisis (conduct an experiment)
• analyse and interpret data
• draw conclusion
• report an investigation

Question 8

Explain the difference between a case study and a longitudinal study

Answer 8

Longitudinal studies are undertaken over a long period of time and a prolonged case study where as a. Case study is an in-depth investigation of a situation/person

Question 9

What is the process of trial and error

Answer 9

Testing recording and repeating investigation until a suitable conclusion is found

Question 10

Explain the process of conducting a survey

Answer 10

The process of systematically collecting, analysing and interpreting specific data and observing patterns

Question 11

what are the human ethical principles

Answer 11

Voluntary participation
Informed consent
No risk of harm
Confidentiality

Question 12

What are the principles of animal ethics

Answer 12

Valid
Humane
Justifiable
Considerate

Question 13

Explain the importance of safety in an investigation

Answer 13

Safety considerations include physical safety of people involved but also factors such as if the participants feel insecure threatened or embarrassed

Safety also insures the importance of safety devices and personal protection