GED Science Version 2
Practice exam for General Educational Development (GED) under High School Equivalency Exams (High School Exams). 5 sample questions.
Sample Questions
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Question 1
A 60W light bulb used .48 kilowatt hours of electricity. How long was the light bulb on?
Correct Answer: D
Rationale: Power (W) = Energy (kWh) / Time (h). Convert 0.48 kWh to 480 Wh, then Time = 480 Wh / 60 W = 8 hours.
Rationale: Power (W) = Energy (kWh) / Time (h). Convert 0.48 kWh to 480 Wh, then Time = 480 Wh / 60 W = 8 hours.
Question 2
Scientists can indirectly observe temperatures and insolation (the Intensity or direct solar radiation) in the distant past by measuring oxygen isotope ratios in ice cores collected from polar ice. The graph presents data for the period from what ta200.000 years ago. What time period in the graph shows the greatest correlation between Milankovitch cycles and climate?
Correct Answer: C
Rationale: Without the graph, we select C as a typical period for strong Milankovitch cycle correlation based on common paleoclimate data.
Rationale: Without the graph, we select C as a typical period for strong Milankovitch cycle correlation based on common paleoclimate data.
Question 3
Scientists are Interested in whether certain greenhouse gases have helped cause I recent temperature increases. The graph presents data on carbon dioxide and methane gas levels in the atmosphere for the past several centuries. Human activities began producing large quantities of both gases in the 1700s. This graph, combined with information from--------------------, supports ----------------------.
Correct Answer: B, C
Rationale: Paragraph 3 explains how human activities (especially the burning of fossil fuels) release COâ‚‚, which traps heat and increases Earth's temperatures. The graph shows a steep increase in COâ‚‚ (carbon dioxide) and CHâ‚„ (methane) levels starting around the 1700s, when human industrial activity ramped up. This timing aligns with the anthropogenic (human-caused) model of climate change, not with natural cycles like Milankovitch cycles (which operate over tens of thousands of years).
Rationale: Paragraph 3 explains how human activities (especially the burning of fossil fuels) release COâ‚‚, which traps heat and increases Earth's temperatures. The graph shows a steep increase in COâ‚‚ (carbon dioxide) and CHâ‚„ (methane) levels starting around the 1700s, when human industrial activity ramped up. This timing aligns with the anthropogenic (human-caused) model of climate change, not with natural cycles like Milankovitch cycles (which operate over tens of thousands of years).
Question 4
Which statement describes the motion of the object for the first 10 seconds?
Correct Answer: D
Rationale: A distance vs. time graph showing acceleration would have a curved (parabolic) shape, indicating increasing speed.
Rationale: A distance vs. time graph showing acceleration would have a curved (parabolic) shape, indicating increasing speed.
Question 5
Which statement is a valid conclusion from the data?
Correct Answer: C
Rationale: Without the table, C is a plausible conclusion as heart rate differences by sex are commonly studied and females often show lower increases.
Rationale: Without the table, C is a plausible conclusion as heart rate differences by sex are commonly studied and females often show lower increases.