DEOC REVIEW 7th - 8th Grade

Which of the following best describes the difference between replication and repetition?

• Replication is done by other scientists, repetition is multiple trials by the same scientist

• Replication is changing variables, repetition is not

• Replication is measuring results, repetition is not

• Replication is only for biology, repetition is for geology

Which variable do scientists change in an experiment?

• Independent variable

• Dependent variable

• Control variable

• Constant variable

Which variable do scientists measure in an experiment?

• Dependent variable

• Independent variable

• Control variable

• Constant variable

What do scientific methods help scientists do?

• Investigate and understand the natural world

• Memorize facts

• Avoid experiments

• Ignore evidence

What does the image of the flask with bubbles most likely represent?

• Science experiments

• Cooking

• Art class

• Sports

Why is replication important in science?

• It allows other scientists to verify results

• It makes experiments more expensive

• It reduces the number of trials needed

• It is only used in geology

Which of the following is NOT a variable in an experiment?

• The color of the scientist’s lab coat

• Independent variable

• Dependent variable

• What we measure

What do scientific laws describe?

• Patterns in nature

• Unproven ideas

• Personal opinions

• Historical events

Which of the following is supported by evidence?

• Both theories and laws

• Only theories

• Only laws

• Neither

What do scientific laws help us do?

• Describe patterns in nature

• Make random guesses

• Ignore evidence

• Change facts