GED Science Test practice questions
201 free questions with answers and explanations.
- 51.A student is investigating the phenomenon of resonance in a simple pendulum. They find that by applying small, periodic pushes to the pendulum at its natural frequency, its amplitude of swing increases significantly. What is the fundamental principle illustrated by this observation?Physical Science
- 52.A car traveling at 20 m/s applies its brakes and comes to a complete stop in 4 seconds. Assuming constant deceleration, what is the distance the car travels during this braking period?Physical Science
- 53.A scientist is investigating the relationship between the volume and temperature of a gas. They observe that as the temperature of a fixed amount of gas increases, its volume also increases, assuming the pressure remains constant. Which gas law describes this relationship?Physical Science
- 54.A technician is setting up a laser to cut material. They need to ensure the laser light travels in a perfectly straight line without spreading out. Which characteristic of laser light is most relevant to this requirement?Physical Science
- 55.A student is designing an experiment to demonstrate the properties of light. They want to show that light can be bent or refracted as it passes from one medium to another. Which of the following setups would best illustrate this phenomenon?Physical Science
- 56.A student is investigating how the period of a simple pendulum changes with its length. They measure the time for 20 oscillations for pendulums of various lengths. What is the dependent variable in this experiment?Physical Science
- 57.A satellite orbits Earth in a circular path at a constant speed. Despite its constant speed, the satellite is continuously accelerating. This acceleration is directed towards the center of the Earth and is responsible for keeping the satellite in orbit. What type of force is responsible for this acceleration?Physical Science
- 58.A scientist is studying the behavior of an ideal gas. If the temperature of a fixed amount of gas in a sealed container is doubled (from 273 K to 546 K) while its volume is kept constant, what will happen to the pressure of the gas?Physical Science
- 59.A student is observing a pendulum swinging back and forth. They measure the time it takes for the pendulum to complete one full swing (return to its starting point). What property of the wave-like motion is the student measuring?Physical Science
- 60.An engineer is designing a heat exchange system. They want to transfer heat efficiently from a hot liquid to a cooler liquid without the two liquids mixing. Which of the following materials would be the most suitable choice for the barrier separating the two liquids?Physical Science
- 61.A student is investigating the properties of a non-Newtonian fluid by mixing cornstarch and water. They observe that the mixture acts like a solid when a sudden force is applied, but flows like a liquid when left undisturbed. Which property of the fluid is primarily responsible for this observed behavior?Physical Science
- 62.A student measures the mass of a block as 150 grams and its volume as 50 cm³. What is the density of the block?Physical Science
- 63.A diver is exploring a coral reef at a depth of 10 meters. The pressure at the surface of the water is 1 atmosphere (atm). Given that every 10 meters of seawater adds approximately 1 atm of pressure, what is the total pressure experienced by the diver at that depth?Physical Science
- 64.A technician is setting up an experiment to demonstrate how sound travels. They place a ringing alarm clock inside a sealed glass jar and then begin to pump the air out of the jar. As the air is removed, the sound of the alarm clock becomes fainter and fainter until it is almost inaudible. This experiment best demonstrates that sound waves are:Physical Science
- 65.An electrical engineer is designing a circuit and needs to select a resistor. The resistor has a voltage drop of 12 V across it, and a current of 0.5 A flows through it. What is the resistance of the resistor?Physical Science
- 66.A student is observing a beam of white light as it passes through a triangular prism. They notice that the white light separates into its constituent colors (a spectrum). What phenomenon is responsible for this separation?Physical Science
- 67.A car accelerates uniformly from rest to 20 m/s in 5 seconds. What is the average acceleration of the car?Physical Science
- 68.A homeowner is planning to install a solar panel system. They live in the Northern Hemisphere and want to maximize energy collection throughout the year. To achieve this, the solar panels should be oriented to face which direction?Earth and Space Science
- 69.A team of geologists is investigating a region where ancient marine fossils are found at high altitudes, far from any current ocean. Which geological process best explains the presence of these fossils in such an unexpected location?Earth and Space Science
- 70.A planetary scientist is comparing the atmospheres of Venus and Earth. Despite Venus being farther from the Sun than Mercury, it has a surface temperature of approximately 462°C, far hotter than Earth's. Which of the following best explains Venus's extreme surface temperature?Earth and Space Science
- 71.A geologist is examining a cross-section of Earth's layers. She observes that the lithosphere is broken into several large, rigid pieces that move over a semi-fluid layer. Which of the following terms correctly identifies this semi-fluid layer?Earth and Space Science
- 72.A farmer observes that the soil on their land is becoming increasingly acidic over time, leading to reduced crop yields. They suspect that atmospheric pollution is contributing to this issue. Which atmospheric pollutant is most likely responsible for increasing soil acidity in this scenario?Earth and Space Science
- 73.A meteorologist is tracking a large storm system approaching a coastal region. The storm is characterized by a rapidly rotating column of air, high wind speeds, and heavy precipitation. Which type of storm is the meteorologist most likely tracking?Earth and Space Science
- 74.A seismologist is studying the propagation of seismic waves through Earth's interior after a major earthquake. They notice that a particular type of wave, which travels only through solids, is completely absent in recordings taken from receivers on the opposite side of the Earth from the earthquake's epicenter. This observation is key evidence for the existence of which Earth layer?Earth and Space Science
- 75.A team of researchers is studying a deep-sea hydrothermal vent ecosystem. They observe a thriving community of organisms, including tube worms and chemosynthetic bacteria, in complete absence of sunlight. What is the primary energy source for this ecosystem?Earth and Space Science
- 76.A scientist is studying a rock sample found deep within the Earth's crust. The rock exhibits distinct layers, with evidence of fossilized marine organisms. Which of the following processes is most likely responsible for the formation of this rock?Earth and Space Science
- 77.A geologist is examining rock layers in a mountainous region. They observe that older rock layers are found above younger rock layers, indicating that the rock sequence has been overturned. Which geological process is most likely responsible for this inversion?Earth and Space Science
- 78.A team of geologists is investigating a region where ancient marine fossils are found at high elevations in mountainous terrain. Which geological process best explains the presence of these fossils?Earth and Space Science
- 79.A geochemist is studying the carbon cycle and its interaction with Earth's oceans. She is specifically interested in the process by which atmospheric carbon dioxide dissolves into seawater and can eventually lead to the formation of marine shells. What is the correct sequence of chemical reactions involved in this process?Earth and Space Science
- 80.A town located near a large body of water experiences cooler temperatures in summer and warmer temperatures in winter compared to an inland town at the same latitude. What property of water is primarily responsible for moderating the coastal town's climate?Earth and Space Science
- 81.A scientist is studying a rock sample collected from the Earth's mantle. What is the approximate range of temperatures and pressures that this rock would have experienced within the mantle?Earth and Space Science
- 82.A research vessel is collecting data on ocean currents in the North Atlantic. They observe a deep, cold current flowing southward from the Arctic region, carrying high salinity water. This current eventually sinks and travels along the ocean floor. What is the primary driving force behind this specific type of ocean circulation?Earth and Space Science
- 83.A climatologist is analyzing long-term climate data for a desert region located around 30 degrees latitude. They observe that this region consistently experiences high atmospheric pressure, clear skies, and very little precipitation. Which atmospheric circulation cell is primarily responsible for these climatic conditions?Earth and Space Science
- 84.A climatologist is studying the factors that influence global ocean currents. Which of the following plays the most significant role in driving the deep-ocean currents, also known as the thermohaline circulation?Earth and Space Science
- 85.A planetary scientist is analyzing data from a distant exoplanet. The data indicates that the planet has a very thin atmosphere, a heavily cratered surface, and a rotation period that is exceptionally slow, resulting in extreme temperature differences between its day and night sides. Based on these characteristics, which of the following Earth-like celestial bodies does this exoplanet most closely resemble?Earth and Space Science
- 86.A climatologist is analyzing long-term climate data for a desert region. They observe that the region experiences very little precipitation throughout the year and has significant temperature differences between day and night. Which atmospheric circulation cell is primarily responsible for the aridity of this region?Earth and Space Science
- 87.A research team is monitoring atmospheric conditions in a specific region. They observe a significant increase in the concentration of carbon dioxide over several decades. Which of the following is the most direct and widespread consequence on Earth's climate system?Earth and Space Science
- 88.A space agency is planning a mission to a newly discovered exoplanet. Data indicates the exoplanet has a thick atmosphere composed primarily of hydrogen and helium, a low density, and a strong magnetic field. Based on this information, which type of planet is it most likely to be?Earth and Space Science
- 89.A team of geologists is studying a region known for its frequent volcanic activity and deep ocean trenches. They also observe a chain of volcanic islands running parallel to a major continental landmass. What type of plate boundary is most likely responsible for these geological features?Earth and Space Science
- 90.A city planner is evaluating the long-term impact of constructing a large dam on a major river. Which of the following is the most significant long-term consequence for the regional ecosystem due to altered water flow and sediment transport?Earth and Space Science
- 91.A climate scientist is analyzing data on global ocean temperatures and sea levels over the past century. They observe a consistent trend of rising ocean temperatures and an accompanying increase in sea levels. Which primary factor directly contributes to the rise in sea levels as ocean temperatures increase?Earth and Space Science
- 92.A geologist is analyzing seismic wave data from an earthquake. She observes that S-waves are detected at seismograph stations located on one side of the Earth, but not on the opposite side, creating a 'shadow zone'. What does this observation primarily indicate about Earth's interior?Earth and Space Science
- 93.A spacecraft is preparing for re-entry into Earth's atmosphere. To protect the spacecraft and its occupants from extreme heat generated by friction, engineers design a heat shield. Through which primary process does this heat shield dissipate the immense thermal energy during re-entry?Earth and Space Science
- 94.A space agency is planning a mission to explore a newly discovered exoplanet. The exoplanet is described as having a thick atmosphere composed primarily of hydrogen and helium, with no solid surface, and a very strong magnetic field. Based on this description, which type of planet is it most likely to be?Earth and Space Science
- 95.A geophysicist is studying the movement of Earth's tectonic plates. She observes that two plates are moving towards each other, with one plate being forced beneath the other into the mantle. Which of the following geological features is most characteristic of this type of plate boundary?Earth and Space Science
- 96.A meteorologist is tracking a large, rotating storm system over the tropical Atlantic Ocean. The system has sustained winds of 150 km/h, a well-defined eye, and is moving westward. What category of storm is the meteorologist most likely observing?Earth and Space Science
- 97.A team of oceanographers is studying a deep-sea hydrothermal vent ecosystem. They observe unique organisms, such as giant tube worms and chemosynthetic bacteria, thriving in the complete absence of sunlight. What is the primary energy source that supports the food web in this environment?Earth and Space Science
- 98.A city is experiencing a prolonged period of drought, characterized by unusually high temperatures and minimal precipitation. A climatologist notes that for several weeks, a large, stable mass of warm, dry air has been dominating the region. This atmospheric condition is most indicative of which type of pressure system?Earth and Space Science
- 99.A geophysicist is studying the Earth's interior and observes that seismic P-waves change speed and direction as they pass through a particular layer. S-waves, however, are completely absorbed and do not pass through this layer. Which layer of Earth's interior is the geophysicist observing?Earth and Space Science
- 100.A team of researchers is studying a deep-sea hydrothermal vent ecosystem. They observe a thriving community of organisms, including tube worms and bacteria, flourishing in the absence of sunlight. Which process is the primary energy source for the producers in this unique ecosystem?Earth and Space Science