Experimental Design Principles

Question 1

Julian is late to class and sees a list on the board:-Are explanations of observations and hypotheses -Are based on many experiments -Have been revised over time -Can be used to predict what may be expected in the futureWhat is Julian’s class discussing?

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B: theories

Question 2

What is a difference between Newton’s laws of motion and Einstein’s theory of relativity?

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D: Newton’s laws cannot be replaced, but Einstein’s theory can with new information.

Question 3

Ahmed kept a balloon from his birthday for several days until it began to deflate and slowly sink to the ground. He wondered how the balloon was losing its ability to float. He decided to use his Physical Science textbook to get more answers.What chapter should Ahmed read to learn more about how things function or behave?

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A: Laws

Question 4

In their work on collision, Trautz and Lewis explained how chemical reactions occur and why they have different reaction rates. This work is an example of

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A: a theory because it is a well-tested, widely accepted explanation about the natural world.

Question 5

A hypothesis is a possible answer or explanation to a scientific question based on

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C: prior knowledge or research that is testable.

Question 6

Which statement is correct?

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C: Theories may be revised over time as information is discovered or technology is developed.

Question 7

Read the diagram below. What makes this diagram incorrect?

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B: B and C need to be switched.

Question 8

What is an example of a hypothesis leading to a new experiment?

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C: Galileo had the idea that objects of different weight will fall at the same speed. He tested this by dropping different balls off of the Leaning Tower of Pisa.

Question 9

While Sophia was driving to work, she tried to avoid hitting an animal and instead hit a parked car. As the car stopped, her body continued to move forward at the same speed and in the same direction.What happened to Sophia’s body in the car accident is an example of

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B: a factual statement about how something behaves or functions.

Question 10

Keema and Diego go fishing every year at the same lake. This year they notice they are not catching as much fish as they normally do. Keema says to Diego, “I think there are fewer fish than last year because of higher levels of pollution from the power plant that was built down the road last year.”Keema’s statement is

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C: a hypothesis.

Experimental Design Principles Answers

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