8th Adv 1st Semester Review Quiz

Which conclusion is best supported by the data shown in the table above?

• The amount of water given to plants has no effect on how much they grow.

• Plants that get more than 2 cm of water each day grow more.

• Plants that get more sunlight each day grow more.

• The amount of sunlight has no effect on how the plants grow.

What makes a controlled experiment different from other scientific investigations, such as a systematic observation?

• It allows the investigator to make a claim based on evidence gathered during the investigation.

• It uses scientific methods of research to reach a conclusion about the topic of study.

• It provides the investigator with a way to test a hypothesis or confirm the results of a prior investigation.

• It isolates a single variable by controlling all other variables that may affect the outcome of the investigation.

Allison is testing how air pressure affects the bounce height of a basketball. She drops the ball twice at each air pressure she selected and measures the bounce height. However, she notices that her results are inconsistent and the bounce heights vary greatly between the two trials.

Based on the information above, which of these statements is most appropriate?

• There is no relationship between air pressure and bounce height.

• Higher air pressure results in higher bounce heights.

• Lower air pressure results in higher bounce heights.

• She has not performed enough trials to form a reliable conclusion; the data is too inconsistent.

How does a scientist know if he/she has run enough trials in an investigation?

• Three trials is the standard expectation

• When the answer matches the prediction

• When the data is consistent and predictable

• Ten trials usually gives reliable data

If the data from an investigation matches the prediction that was made before the test, which of the following statements would be most appropriate?

• The data proves the hypothesis correct.

• The prediction proves the hypothesis correct.

• The investigation was a success.

• The evidence supports the hypothesis.

Scientists prefer to use phrases such as “the results support…” rather than to say they have “proven” an explanation correct.

• TRUE

• FALSE

If the data from an investigation does not match the prediction that was made before the test, which of the following statements would be most appropriate?

• The investigation was a failure.

• Something must have been done incorrectly.

• The investigator should keep collecting data until it supports the hypothesis.

• The investigation successfully refuted (“disproved”) the hypothesis.

If a hypothesis is tested and shown to be inaccurate, scientists view this as a success.

• TRUE

• FALSE

Which of the following statements BEST represents a scientific idea?

• “Splitting a pole” while walking with someone will cause bad luck.

• Our universe was formed during a massive explosion of matter and energy called the Big Bang.

• The great pyramids in Egypt were built under the guidance of ancient aliens.

• The Bermuda Triangle has caused many ships to get lost at sea.

Which of the following statements best explains the difference between actual science and pseudoscience?

• Actual science studies real things while pseudoscience studies fake things.

• Actual science is true while pseudoscience is false.

• Actual science can be used to study any topic, but pseudoscience can only study the supernatural.

• Actual science must have all of the characteristics of "CONPTT", but pseudoscience does not have all of them.