Try our second free GED Science Practice Test to keep building your skills and confidence! This test features new questions that cover life science, physical science, and Earth and space science. You’ll analyze data, interpret charts and graphs, and apply scientific reasoning to answer each question.
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Question 1 of 12
Mia believed that meditating for 14 days in a row would make students happier. To test her hypothesis she did an experiment with 40 students from her class. She provided each of these students with an app that guides users through a 5, 10, or 15 minute meditation.
After Mia presented the results to her class, her teacher told her that she made an error in designing her experiment. What was the most likely error?
Question 2 of 12
Sustainable agriculture is the act of farming using principles of ecology, the study of relationships between organisms and their environment. Unsustainable agriculture involves practices that can cause long-term damage to soil over time. This includes too much tillage that can lead to erosion, as well as irrigation without adequate drainage (leading to salinization). Long-term experiments have provided some of the best data on how various practices affect soil properties essential to sustainability. In the United States, the USDA-Natural Resources Conservation Service specializes in providing technical and financial assistance for those interested in pursuing natural resource conservation and production agriculture as compatible goals. The most important factors for an individual farm are sun, air, soil, nutrients and water. Of the four, water and soil quality and quantity are most amenable to human intervention through time and labor.
Which sentence from the paragraph supports the idea that specific farming techniques used by humans are responsible for the environmental damage caused by unsustainable agriculture?
Question 3 of 12
As part of a study on how skin type and redness correlate when exposed to different amounts of UV light, a scientist set up an experiment to see how much redness occurred on various skin types. The scientist classified 100 people into six different categories of skin type, then exposed them to increasingly higher doses of UV light and recorded the level of redness that appeared on the skin.
Which is an independent variable and which is a dependent variable in this experiment?
Question 4 of 12
Use the table to answer questions 23 & 24.
Hypothesis: If a greater percentage of energy is derived from renewable resources, and a lower percentage is derived from coal, then CO2 emissions will decrease annually.
Is the hypothesis supported by the data in the table?
Question 5 of 12
The table provided suggests that decreasing the percentage of coal used for energy annually correlates with an increase in CO2 emissions. Given that the processing of coal is the primary contributor to CO2 emissions in the US, which of the following statements may explain the trend shown in the data table?
Question 6 of 12
A cladogram is a diagram that organizes species into groups based on their similarities. It also shows evolutionary relationships among the groups.
Based on the information in this cladogram, which of these statements is true?
Question 7 of 12
Cold brew coffee is one of the fastest growing trends in coffee houses across the USA. It is typically made by mixing fresh ground coffee with cold water and letting it brew for 12 to 24 hours. One coffee house came up with the idea of injecting nitrous gas into the cold brewed coffee, thinking that it might improve the taste. As they tried out this new idea, they found out that the pressure of the nitrous gas had a dramatic effect on the flavor of the coffee. At that point they decided to run an experiment with 3 batches of coffee, in an effort to find the amount of pressure that produces the best tasting coffee. The chart provided shows the procedures that they followed for each of the batches.
What was the error in the design of their experiment?
Question 8 of 12
Two objects on Earth are dropped from the top of a building that is 70 meters high. Object A has a mass of 12 g and object B has a mass of 6 kg. Assuming there is no air resistance, which object will hit the ground first?
Question 9 of 12
A lake contains many fish that local bears depend on as their major source of food. What would be the consequence of an algal bloom killing off a large portion of the fish population?
Question 10 of 12
Researchers have created a formula for predicting the impact of population growth on the environment:E = (P x N) ÷ T E is environmental impact, P is population, N is energy demand, and T is development of new technology.
Based on this equation, in order to sustain population growth and maintain environmental impact, what factor must change at a rate equal to the rate of population growth?
Question 11 of 12
Two mice mate and produce offspring. Both of the mice have the genotype (Gg) which is the phenotype for grey fur color. Use a Punnett square to calculate the probability that these two mice will produce an offspring with white fur (gg).
Question 12 of 12
Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment. Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points.
Which of the following describes the feedback method used by a healthy human to regulate body temperature first in warm surroundings and then in cold surroundings?
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