Science inquiry Term 1

Question 1

Use of controlled experiments. How difference occurs between the results.

Answer 1

investigate relationship between factors/variables by an almost identical set up with one variable different.
Difference in results are due to variable change.

Question 2

What is a survey? What data do they collect? add an example

Answer 2

Systematically collecting info about an aspect of study.
Collect data from large groups of subjects
e.g. questionnaire/interview

Question 3

What is trial and error? What do they allow?

Answer 3

Systematic process-one attempt to solve a problem followed by another
Allow investigator to gradually find solution to problem

Question 4

Ways to add safety

Answer 4

-fire extinguisher
-fire blankets
-fume hoods
-eye washes
-safety glasses
-gloves
-face masks
-protective clothing
-check for allergies, health problems

Question 5

What are the principles of ethics? Define ethics

Answer 5

A set of moral values and principles
Voluntary participation
Informed consent
Risk of harm (none)
Confidentiality
Anonymity

Question 6

What is the difference between repetition and reflection. What do they aid in doing?

Answer 6

Rep-same experiment many times
Ref-a number of identical experiments running together/performing the experiment on a large number of subjects at the same time

Help to demonstrate the results are consistent.

Question 7

Define accuracy. How does it occur?

Answer 7

Measure of how close data is to the exact value, based on equipment used
i.e calibrated correctly

Question 8

Define reliability. How does it occur?

Answer 8

extent to which an experiment gives same result each time it is performed.
Due to larger sample size or repetition.

Question 9

Define valid. How does it occur?

Answer 9

Experiment is testing what it set out to test.
Due to controlled variables

Question 10

Difference between quantitative and qualitive data

Answer 10

quant-expresses in numbers and usually involves measurements
qual-observation that do not involve numbers or measurements

Question 11

What is systematic error

Answer 11

flaws in the method or apparatus that lead to results that are either always above or always below the true value

Question 12

What is random error

Answer 12

have measurement that are spread randomly above or below the true value

Question 13

Define measurement error

Answer 13

Difference between a measurement and the true value of what is being measured

Question 14

4 graph types and their uses

Answer 14

-bar/column (discrete data)
-histograms (frequencies-no gaps)
-line graphs (continuous data)

Question 15

Define placebo

Answer 15

an inactive substance that looks like the drug or treatment being tested.

Question 16

Define observation

Answer 16

process of using the sense to aquire information

Question 17

Define case study

Answer 17

In-depth investigation of one particular person or situation

Question 18

Define interpolation

Answer 18

estimation within the range of the original data

Question 19

Define extrapolation

Answer 19

estimation beyond the range of the original data unreliable

Question 20

Define variable

Answer 20

factor that may change during an experiment

Question 21

Difference between controlled and uncontrolled variables

Answer 21

un-variable that could not be kept the same for the control and experimental groups in an experiment
controlled-factor kept same for both control and experimental

Question 22

Define literature review

Answer 22

survey of the material that has been written about a subject under consideration

Question 23

What is the scientific method

Answer 23

1. recognise the problem
2. collect information on problem
3. propose a hypothesis
4. test the hypothesis
5. analyse the data
6. draw a conclusion
7. report on investigation