This is the 1st of six Science HiSET practice tests that we offer. The practice test contains 10 questions. You may not skip any of the questions. You must answer all of the questions to receive your score. There is no time limit on the test.
You’re welcome to retake our tests as many times as you’d like. If you want to improve your score or feel like you need more practice, you can retake this test by clicking the “Retake Quiz” button at the end of the test. The questions will be the same but presented in a different order.
Science HiSET Practice Test 1
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Question 1 of 10
Chemical fertilizers stimulate plant growth; but if the concentration is too high, they may damage roots. What precautions concerning chemical fertilizers must a gardener take?CorrectIncorrect
Question 2 of 10
Amniotes vertebrates are generally classified into three orders: Reptilian, Ayes (birds), and Mammalian. Of the following, which group of three animals contains one member of each order?CorrectIncorrect
Question 3 of 10
As temperature rises, solids generally become more soluble in water, but gases become less soluble. If a soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? A) Sugar may precipitate out. B) Gas bubbles may form and produce foam. C) Water may evaporate rapidly.CorrectIncorrect
Question 4 of 10
Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of electrolytes will conduct an electric current. When an electrolyte forms into a solution, it dissolves or dissociates into ions, a process called ionization. If a substance does not ionize, it will not conduct an electric current. Electrolytes include most acids, bases, and salts. Some conductors include hydrogen and sodium chloride, copper sulfate, and potassium nitrate. Substances that are not electrolytes include distilled water, sugar water, and most organic compounds.
Which of the following is a nonelectrolyte?CorrectIncorrect
Question 5 of 10
Scientists believe that the universe is expanding because of which of the following indicators?CorrectIncorrect
Question 6 of 10
Humidity is the amount of water vapor in the air at a given time. At warm temperatures, air can hold more moisture than it can at cold temperatures. Relative humidity is the amount of vapor the air is holding expressed as a percentage of the amount the air is capable of holding. For example, at 86 degrees Fahrenheit, air can hold a maximum of 30.4 grams of water per cubic meter. If the air at the same temperature is holding only 15.2 grams of water, the relative humidity is 50 percent. At the point at which the air becomes saturated (exceeds the level of water vapor it can hold), it releases water vapor in the form of dew or condensation. If the air at 75 degree’ holding the maximum amount of moisture that it can, and the temperature suddenly drops to 60 degrees, what is likely to be the result?CorrectIncorrect
Question 7 of 10
The Smiths have four children, all girls. Their fifth child is a boy. Why did this change occur?CorrectIncorrect
Question 8 of 10
Air is composed of nitrogen, oxygen, argon, carbon dioxide, and other gasses. How may air be best described?CorrectIncorrect
Question 9 of 10
Table salt – sodium chloride, one of the most common substances occurring in nature – is best classified as which of the following?CorrectIncorrect
Question 10 of 10
The earth ______ on its axis from west to east.CorrectIncorrect