Designing Experiments
Choosing Tools & Procedures for Experiments
Other
Drawing Conclusions, Bias and Errors
Technological Design & Bioengineering
100
Which term below best describes a hypothesis? A. the result of an experiment B. a well-tested explanation for why something happens C. a random guess about what causes something D. a possible explanation of an observation or result
What is a possible explanation of an observation or result?
100
this is used to measure weight.
What is a spring scale?
100
Which of the following accurately describes what scientists mean by a controlled experiment? A. The outcome is controlled. B One variable remains fixed while other variables are changed. C. One variable changes throughout the experiment while all other variables remained fixed. D. Experimental results are obtained by computer models.
What is one variable remains fixed while other variables are changed?
100
A report of which of the following observations would be inconsistent with current theories about Earth? A. Satellite data that shows continents moving. B. Measurements show Earth's core is made of molten rock. C. Earth's revolution around the sun takes slightly more than 365 days. D. Observations show air pressure is lowest at sea level.
What is observations show air pressure is lowest at sea level?
100
Which of the following is an example of technology? A. a pair of pliers B. a way to breed a new plant with desirable characteristics C. manufacturing robots that assemble automobiles D. all of the above
What is all of the above?
200
this is the cause of the experiment or what is being tested.
What is independent variable?
200
A balance is used to measure the mass of a piece of metal which was 12 grams. A displacement is done to measure the volume of the piece of metal which is 6 mL. Determine the density of the metal.
What is 2.0 g/ml?
200
Which type of graph is useful for showing parts of a whole? A. line graph B. bar graph C. histogram D. circle graph
What is circle graph?
200
give me an example of a bias in an experiment.
What is there can be many answers.
200
As part of an engineering design process, engineers want to make a less expensive disposal towel. Which of these materials would they most likely want to test? A. silk B. iron C. paper D. fiberglass
What is paper?
300
A student measures how a snake's body temperature changes in response to the surrounding air temperature. What is the dependent variable in this investigation? A. the snake's body temperature B. the temperature of the air C. the species of snake D. the thermometers that are used
What is the snake's body temperature?
300
A student wants to find out the precise volume of a coin. Which tool is best for measuring the volume of the coin? A. 25 mL beaker B. 100 mL beaker C. graduated cylinder D. scale
What is graduated cylinder?
300
Which best explains an example of adapted engineering? A. automobile tires made from recycled materials, because resources are conserved. B. walking canes made from lightweight material because mobility is increased C. hearing aids worn in the ear canal, because a disability is overcome D. vision corrected laser surgery, because a permanent change is made.
What is D?
300
You are outdoors on a cold winter day. The sun is shining brightly. A strong wind blows out of the north. You wrap a scarf tightly around your neck. You shiver. Which pair of words represents a cause-and-effect relationship? A. scarf; shiver B. wind; shiver C. shiver; wind D. sun; shiver
What is wind; shiver?
300
Which of these is an unintended consequence of technology? A. communicating with people in other countries by instant messages B. using your computer to find information about an illness from a library far from you home C. people finding your personal information by using their computers D. being able to purchase a CD online that is not available in a local store
What is people finding your personal information by using their computers?
400
In an experiment, you change the pressure to find out how it affects the volume of a gas. You make sure to keep the temperature constant. What is the independent variable in the experiment? A. the temperature of the gas B. the volume of the gas C. the gas D. the pressure
What is the pressure?
400
Scientists are designing a new antacid. The purpose of an antacid is to neutralize stomach acid. Which tool would best help scientists determine if the new antacid is effective in neutralizing stomach acid? A. Litmus paper B. thermometer C. graduated cylinder D. microscope
What is A?
400
Land areas are preserved to protect biodiversity, which helps preserve the unique characteristics of the organisms. Sometimes land is preserved in several smaller patches that are spread out instead of one large area. Which organisms will most likely become endangered if the land preserves are spread out in patches? A. organisms that are able to fly great distances. B. organisms that need a lot of space to graze. C. organisms that hibernate in winter. D. organisms that burrow underground
What is B?
400
After swimming in the ocean, Clifton sits in the sun to dry off. After a while, he notices that he has small white crystals on his skin. Analyze the explanations below as to their strengths and weaknesses based on this evidence. Which is the most reasonable explanation of what happened? A. The water evaporated and attracted dust to Clifton's skin. B. The white crystals are dead skin cells that are being shed. C. Clifton has developed a rare skin disorder. D. Salt that is dissolved in the water remained on Clifton's skin after the water evaporated.
What is salt that is dissolved in the water remained on Clifton's skin after the water evaporated?
400
Which of these is the best example of a product developed by bioengineers? A. the internet B. cars that use less fuel C. bacteria that produce silk D. a new metal alloy
What is bacteria that produce silk?
500
Scientists are conducting tests to determine a drug's effectiveness and its potential side effects. Their tests include two groups: a group of people who are given the drug and another group who are given a sugar tablet instead of the drug. What is the role of the group who are given a sugar tablet instead of the drug? A. They are the test group. B. They are the control group. C. They are the independent variable in the experiment. D. They are the dependent variable in the experiment.
What is they are the control group?
500
A student builds an electromagnet with a battery, wire, and nail. How will the student know if the electromagnet works after it is completed? A. touch the battery to see if it is hot B. count the number of coils around the nail C. place a light bulb near the electromagnet and see if it glows. D. observe if a metal objects are attracted to the electromagnet
What is D?
500
Which substance is a mixture? A. sugar B. salt C. water D. milk
What is milk?
500
Which factor is most likely to introduce bias or error into an experiment designed to determine which brand of bar soap kills bacteria most effectively? A. using different types of soap B. using different amounts of soap C. using the same amount of bacteria for each trial D. having the bacteria on identical surfaces
What is using different amounts of soap?
500
Which of the following is an adaptive bioengineered product? A. liquid pesticides spray for plants B. fertilizer that can be put in the soil for plants C. gene introduced into a plant that helps it control the pest when the pest tries to eat the plant D. pesticide dust for plants
What is gene introduced into a plant that helps it control the pest when the pest tries to eat the plant?
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