Unit Test — Unit test Answers

Which is a scientific claim?

Saul converts 2.392 hectoliters to liters. What should his new number be?

A recent encyclopedia entry about dogs cites multiple research papers done by scientists at veterinary schools. According to the article, Labrador retrievers come in two specific breeds: English and American. The English breed is described as stocky and heavy, while the American breed is described as tall and lanky. The article describes current scientific research as showing that males of both breeds usually weigh about 29-41 kg (65-90 lb), and females weigh 25-32 kg (55-70 lb). Coat colors for both breeds come in solid black, yellow, or chocolate. All labs have strong tails and webbed feet, which help them swim. Devon would like to use this information to determine if his new dog is an English or American Labrador retriever. Which best describes the reliability of the information?

Bena thinks that dissolving more salt in water causes the mixture’s freezing temperature to change.Which is the best type of scientific investigation for Bena to use to study this?

Which best describes the purpose of bar graphs?

Which serves as evidence for a scientific claim?

Analyze the graph.

Hybrid seeds are deliberately crossbred for particular traits, such as growth pattern or disease resistance. They have been hand-pollinated and are patented, often sterile, and genetically identical within food types. These plants are usually grown in a monocultural environment and are cultivated for mass production and sale. They must be sturdy to withstand mechanical picking and cross-country shipping. They do not compare to the quality and taste of heirloom plants, but they do produce large, healthy fruit that appeals to most shoppers. Unlike heirloom seeds, if one saves a hybrid seed, one will not get the same plant again. Which statement can be removed and not affect the excerpt’s reliability?

Which professional most likely uses X-ray technology?

Alpa wants to change 0.54 kilometers into a smaller metric unit. She will have to

Which is one precaution to take when working with heat and fire?

Which microscope is the most powerful and can map the atoms on the surface of an object?

Hunter is in lab. He clears a spot on his lab bench to start working. He also puts his lab coat and goggles on. He then identifies where all of the safety equipment is. He notices his station is next to the fume hood, which ventilates the chemicals stored there. The noise of the fume hood was bothersome, so Hunter turned it off.Which could be an error in his set-up?

Which kind of investigations allow for the control of variables?

In double-blind studies neither the test subject or the researcher knows who was given the drug and who was given the control. Why are these studies effective for testing a drug that may elevate mood and relieve feelings of depression?

Read the measurement.

A class is using marshmallows to demonstrate different chemicals’ properties by heating and cooling the marshmallows. Which student is practicing bad laboratory safety?

Alisha organizes her data about the element lead into a table.Which did Alisha place in the wrong column?

Which describes data that is faked or misplaced?

Nami conducts an investigation on plants. She places a grow light on a timer to give the plants different amounts of light to see if this would affect their growth. Which term describes the amount of light in this investigation?