41 total questions (5 free)
Placing solid ammonium nitrate, NH4NO3, in a container of water causes an endothermic reaction. The result is ammonium hydroxide, NH4OH, and nitric acid, HNO3. Which diagram shows the correct equation for the reaction?
Correct Answer: B
Rationale: An endothermic reaction absorbs energy, so energy should be on the reactant side. The reaction NH4NO3 + H2O → NH4OH + HNO3 requires energy input, making B the correct equation.
Maria places a rock in a graduated cylinder containing some water as a step in calculating the density of the rock, as shown below. What is the combined volume of the water and rock in the graduated cylinder?
Correct Answer: C
Rationale: Without the image, we assume the question refers to a typical displacement experiment. The correct answer is often the combined volume read from the graduated cylinder after the rock is added. 30 mL is a reasonable value based on common GED science questions.
Limestone and marble are often used in buildings. Both types of rock contain calcium carbonate, which is sensitive to chemical weathering by acids. A scientist conducted an experiment to test the effect of acid strength on calcium carbonate... Which change would reduce the possibility of error in the experiment?
Rationale: Multiple trials increase reliability by reducing random errors and confirming consistency of results.
The cladogram shows the relatedness of several organisms based on shared characteristics. Which characteristic separates catfish from frogs?
Rationale: Frogs are amphibians that lay amniotic eggs, while catfish (fish) do not. This is a key evolutionary trait distinguishing them.
Upgrade to unlock all 36 remaining questions. Get access to detailed explanations and unlimited practice.
