Practical Tests

Question 1

Benedict’s solution

Answer 1

For reducing sugars

Question 2

Biuret test

Answer 2

For proteins

Question 3

Iodine test

Answer 3

For starch

Question 4

Emulsion test

Answer 4

For lipids

Question 5

What does a oscilloscope measure

Answer 5

Frequency and voltage changes

Question 6

Independent variable

Answer 6

Variables you change in an investigation
Eg type of ball
Size of ball
Surface ball will be droped on

Question 7

Dependent variable

Answer 7

Variable you are investing and measure during an investigation
So how high the ball will bounce depending on the independent

Question 8

Control

Answer 8

The variables kept constant during an investigation
Type of ball
Size of ball
Surface ball will be dropped on

Question 9

A method

Answer 9

Step by step instructions
Logically ordered
Allow you to take sensible measurements
Allow you to test hypothesis

Question 10

What you need to think about while writing a method

Answer 10

What you are testing
What you want to measure
What techniques will you use
What variables will you control
What are you going to do with the data
How many repeated readings will you take
How you are going to measure

Question 11

Ways of processing data

Answer 11

Mean and standard deviation
Error bars
Statistical tests
Use of formulae
Conversion of units
Standard form
Percentage error in measuring equipment