SCIENCE

Question 1

Controlled Experiment

Answer 1

➳An experiment in which a variable except one are constant

➳A scientist carries out two tests at the same time that are identical in every aspect, except for one variable

Question 2

Variables

Answer 2

➳Different factors involved in an experiment

Question 3

Controlled variable

Answer 3

➳The variables that remain the same during an experiment

Question 4

Constant

Answer 4

➳A factor that remains the same during an experiment

Question 5

Independent/Manipulated Variable

Answer 5

➳This is the one factor that the scientist changed in th experiment

Question 6

Dependent/ Responding Variable

Answer 6

➳The factor in an experiment that hanged as a result if the independent variable

Question 7

Control Setup

Answer 7

➳The part of the experiment that doesn’t contain the independent variable
➳Used for comparison

Question 8

Theory

Answer 8

➳An explanation based on many observations supported by experiments

Question 9

Law

Answer 9

➳A rule of nature that sums up observations and experimental results

Question 10

Experiment

Answer 10

➳A planned and organized activity in which you test a hypothesis
➳Unknown outcome
➳Has procedures

Question 11

Procedures

Answer 11

➳Steps you have to follow in an experiment

Question 12

Francesco Redi

Answer 12

➳Italian physician
➳Disproved Theory of Spontaneous Generation by doing a controlled experiment
➳Checked whether maggots came from decaying meat

Question 13

Redi’s Experiment

Answer 13

➳1668
➳Controlled experiment
➳Independent Variables: Gauze Cover
➳Controlled Variables: Meat, Temp., Jar, Air, Flies, Time, Location
➳Experiment Setup: Jar with cover
➳Control Setup: Jar without cover
➳Dependent Variable: Maggots Appearing
➳Purpose: To show maggots don’t appear from rotting meat
➳Result: Maggots only appeared in the uncovered jar
➳Conclusion: Maggots appear from decaying meat

Question 13

Lazaro Spallanzani

Answer 13

➳Italian naturalist (type of scientist)
➳Scientists could see microorganisms because of microscopes after Redi’s death
➳Attempted to disprove the Theory of Spontaneous Generation
➳Spontaneous generation can’t occur in microorganisms

Question 14

Spallanzani’s Experiment

Answer 14

➳1767
➳Not a controlled experiment
➳Independent Variables: Cover Air
➳Controlled Variables: Flask, Temp., Broth, Air, Boiled, Time, Location
➳Experiment Setup: Flask with cover
➳Control Setup: Flask without cover
➳Dependent Variable: Microorganisms appearing
➳Purpose: To show microorganisms don’t appear in the air
➳Result: Microorganisms only appeared in the unboiled jar
➳Conclusion: Scientists concluded it was a fail since there was two independent variables

Question 15

Louis Pasteur

Answer 15

➳A French scientist
➳Finally disproved abiogenesis (1864)
➳Checked if microorganisms appeared from air/ not sterilized broth

Question 16

Pasteur’s Experiment

Answer 16

➳Controlled experiment
➳Independent Variables: Boiled
➳Controlled Variables: Flask, Temp., Broth, Time, Location
➳Experimental Setup: Boiled Flask
➳Control Setup: Unboiled Flask
➳Dependent Variable: Microorganisms appearing
➳Purpose: To show microorganisms don’t appear in not sterilized broth
➳Result: Microorganisms only appeared in the unboiled jar
➳Conclusion: Microorganisms weren’t created by the broth