How science works Flashcards Preview

Biology Unit 5 > How science works > Flashcards

Flashcards in How science works Deck (7)
Loading flashcards...
1

Why is it better to show standard deviations instead of range of values

-SD shows variation around the mean whereas range just shows highest and lowest -SD less affected by extreme values;

2

Importance of scientists reporting failed attempts

  • Saves time and money for other scientists
  • Same errors aren't made

3

Important thing to be careful of when sampling

  • Random to avoid bias
  • Large sample size to make data representative

4

How could you use an optical microscope and a slide of muscle tissues to neasure the diameter of a muscle tissue

  • Measure with eyepiece scale;
  • Calibrate against something of known size:

5

Conditions needed for fermenter to grow bacteria

  • sterile conditions;
  • Nutrient medium;
  • Suitable pH/temperature/aeration;

6

Why use mice in experiments?

  • Easy to manage as they can be kept safely in small space;
  • Physiology similar to humans so can be used to predict human behaviour;
  • Genome of mice well known;

7

Why do tails (external) have lower temperatures than inside?

  • Heat lost from tail;
  • By radiation;