Middle School Science Test Practice.

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Quizzes Created: 1 | Total Attempts: 335
| Attempts: 335
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  • 1/18 Questions

    Which of the following statements is true of hurricanes but not of tornadoes?

    • They form only over warm oceans.
    • They have very high winds
    • They may cause great property damage
    • They may cause human fatalities
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Middle School Science Test Practice. - Quiz
About This Quiz

This is for a science project but feel free to use it for else wise. Such as your own Middle School Practice test.

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  • 2. 

    Which of the following is most directly involved with controlling levels of sugar in blood?

    • Hemoglobin

    • Calcitonin

    • Thyroid-stimulating hormone

    • Insulin

    Correct Answer
    A. Insulin
    Explanation
    Insulin is most directly involved in controlling levels of sugar in the blood. Insulin is a hormone produced by the pancreas that helps regulate glucose metabolism. It acts by facilitating the uptake of glucose from the bloodstream into cells, where it can be used for energy or stored as glycogen. Insulin also inhibits the release of glucose from the liver and promotes the storage of excess glucose as fat. Therefore, insulin plays a crucial role in maintaining stable blood sugar levels by promoting the uptake and storage of glucose in the body's cells.

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  • 3. 

    According to some scientists, the Earth's average, surface temperature is rising as a result of the green house effect.  Increase in the atmospheric concentration of which of the following gases is considered to be primarily responsible?

    • Nitrogen

    • Oxygen

    • Sulfur Dioxide

    • Carbon Dioxide

    Correct Answer
    A. Carbon Dioxide
    Explanation
    The correct answer is Carbon Dioxide. According to scientists, the Earth's average surface temperature is rising due to the greenhouse effect, and an increase in the atmospheric concentration of Carbon Dioxide is primarily responsible for this phenomenon. Carbon Dioxide is a greenhouse gas that traps heat in the Earth's atmosphere, leading to global warming.

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  • 4. 

    A gelatinous sample of material from a previously unexplored marine environment is thought to be living or to be composed of recently living material. Which of the following would most clearly confirm that the material has a biological origin?

    • The presence of cells in the sample

    • The presence of hydrogen in the sample

    • Diffusion of material out of the sample

    • Movement of the sample

    Correct Answer
    A. The presence of cells in the sample
    Explanation
    The presence of cells in the sample would most clearly confirm that the material has a biological origin. Cells are the basic structural and functional units of living organisms, and their presence indicates the presence of life. Therefore, if the gelatinous sample contains cells, it strongly suggests that the material is either living or composed of recently living material.

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  • 5. 

    Finding that a solution conducts an electric current shows conclusively that the solution  

    • High boiling point

    • Contains high molecules

    • Is a good oxidizing agent

    • Contains ions

    Correct Answer
    A. Contains ions
    Explanation
    The fact that a solution conducts an electric current indicates that it contains ions. When a substance dissolves in water, it can break apart into charged particles called ions. These ions are responsible for carrying the electric current through the solution. Therefore, if a solution conducts electricity, it must contain ions.

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  • 6. 

    The agent most widely and most consistently at work changing the appearance of the Earth’s surface is.

    • Fire

    • Volcanism

    • Water

    • Wind

    Correct Answer
    A. Water
    Explanation
    Water is the correct answer because it is the agent that has the greatest impact on changing the Earth's surface. Water can erode rocks and soil, create canyons and valleys, and shape coastlines through processes like erosion, weathering, and deposition. It can also cause floods and landslides, further altering the landscape. Additionally, water plays a crucial role in the formation of landforms such as rivers, lakes, and glaciers. Overall, the consistent and widespread presence of water on Earth makes it the most influential agent in changing the Earth's surface.

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  • 7. 

    The Earth’s seasons can be attributed primarily to which of the following in conjunction with its revolution about the Sun?

    • The tilt of the Earth’s axis of rotation relative to the ecliptic

    • The varying amount of sunspot activity

    • The earths orbit about the Sun as an ellipse rather than a circle

    • The rotation of the Earth during a 24-hour day

    Correct Answer
    A. The tilt of the Earth’s axis of rotation relative to the ecliptic
    Explanation
    The Earth's seasons are primarily attributed to the tilt of the Earth's axis of rotation relative to the ecliptic. This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year, leading to the changes in temperature and weather patterns that we experience as seasons. The varying amount of sunspot activity, the Earth's orbit as an ellipse, and the rotation of the Earth during a 24-hour day do not directly cause the seasons.

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  • 8. 

    A piece of paper that appears blue in sunlight is illuminated solely by a red light that is passed through a green filter. What color does the paper appear und4er this illumination?

    • Blue

    • Green

    • Red

    • Black

    Correct Answer
    A. Black
    Explanation
    When a red light is passed through a green filter, it absorbs all the red light and only allows green light to pass through. Since the paper appears blue in sunlight, it means that it reflects blue light and absorbs all other colors. In this case, when the paper is illuminated by red light passing through a green filter, it will absorb all the red light and only reflect or transmit green light. Therefore, the paper will appear black under this illumination.

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  • 9. 

    1. Boron atom, atomic, number 5, atomic mass 13 II. Carbon atom, atomic number 6, atomic mass 11 III. Carbon atom, atomic number 6, atomic mass 12 IV. Nitrogen atom, atomic number 7, atomic mass 13   Consider the atoms described above. Which of the following are isotopes of each other?

    • I and IV only

    • II and III only

    • II and IV only

    • III and IV only

    Correct Answer
    A. II and III only
    Explanation
    Isotopes are atoms of the same element that have different atomic masses. In this case, only options II and III are isotopes of each other because they are both carbon atoms with the same atomic number (6), but different atomic masses (11 and 12). Option I is a boron atom, and option IV is a nitrogen atom, so they are not isotopes of each other.

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  • 10. 

    Several vehicles, initially at a complete stop, begin a long race at the same starting point. The vehicle that has a constant value for which of the following is most likely to win?

    • Linear speed

    • Linear velocity

    • Linear acceleration

    • Momentum

    Correct Answer
    A. Linear acceleration
    Explanation
    The vehicle that has a constant value for linear acceleration is most likely to win the race. Linear acceleration measures how quickly an object's velocity changes over time. In the context of a race, a vehicle with a constant linear acceleration will be able to steadily increase its speed and velocity, allowing it to cover more distance in a shorter amount of time. This gives it an advantage over vehicles with varying or lower linear acceleration values.

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  • 11. 
    In an experiment to study the effect of a new fertilizer on the growth of tall hybrid corn and dwarf hybrid corn, from immediately after germination to ten days of growth, the data below were obtained. Other growing conditions such as water and sunlight were the same for both groups. Which of the following is the most reasonable conclusion that can be drawn from the data above? - ProProfs

    In an experiment to study the effect of a new fertilizer on the growth of tall hybrid corn and dwarf hybrid corn, from immediately after germination to ten days of growth, the data below were obtained. Other growing conditions such as water and sunlight were the same for both groups. Which of the following is the most reasonable conclusion that can be drawn from the data above?

    • The new fertilizer influences the growth of both corn varieties tested

    • The new fertilizer causes faster growth rate for both varieties than do other fertilizers.

    • The new fertilizer improves the root system of the tall hybrid to a greater extent than it does that of the dwarf hybrid

    • The new fertilizer is effective in producing faster growth for both varieties for the first ten days only.

    Correct Answer
    A. The new fertilizer influences the growth of both corn varieties tested
    Explanation
    The given data shows that both the tall hybrid corn and dwarf hybrid corn experienced growth after the application of the new fertilizer. This suggests that the new fertilizer has an effect on the growth of both corn varieties.

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  • 12. 

    Which of the following parts of the Sun is easily visible only during a total solar eclipse?

    • Core

    • Photosphere

    • Sunspots

    • Corona

    Correct Answer
    A. Corona
    Explanation
    During a total solar eclipse, the Moon aligns perfectly between the Earth and the Sun, blocking the Sun's bright photosphere and allowing the much fainter corona to become visible. The corona is the outermost layer of the Sun's atmosphere, extending millions of kilometers into space. It appears as a glowing halo around the darkened disk of the Moon during a total solar eclipse. The core, photosphere, and sunspots are all visible at other times, but the corona is only visible during a total solar eclipse when the photosphere is blocked.

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  • 13. 

    The true length of a block of wood is 1.010 cm. Three measurements of this block produced the following values: 1.4 cm, 1.2 cm, and 0.9 cm. Which of the following statements is true concerning these measurements?

    • They are precise and accurate

    • They are precise but not accurate

    • They are accurate but not precise

    • They are neither precise nor accurate

    Correct Answer
    A. They are neither precise nor accurate
    Explanation
    The measurements of the block of wood are neither precise nor accurate because they do not consistently match the true length of 1.010 cm. Precise measurements would have very little variation between each other, while accurate measurements would closely match the true value. In this case, the measurements have both variation and do not match the true length, indicating that they are neither precise nor accurate.

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  • 14. 

    Animals in which of the following groups may have a backbone and a spinal cord?

    • Mollusks

    • Chordates

    • Invertebrates

    • Echinoderms

    Correct Answer
    A. Chordates
    Explanation
    Chordates are the only group mentioned that may have a backbone and a spinal cord. Mollusks, invertebrates, and echinoderms do not have these characteristics.

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  • 15. 

    Some substances have no noticeable odor because these substances

    • Are soluble and water

    • Can not lose the heat that must be lost before an odor can be detected

    • Have relativity few molecules escaping into the air

    • Do not have molecules with one of the two molecular arrangements required to give an odor

    Correct Answer
    A. Have relativity few molecules escaping into the air
    Explanation
    Substances with no noticeable odor have relatively few molecules escaping into the air. Odor is detected when molecules from a substance enter the nose and interact with receptors in the olfactory system. If there are only a small number of molecules escaping into the air, the concentration of these molecules in the surrounding environment is low, making it difficult for the nose to detect any odor. Therefore, substances with few molecules escaping into the air will not have a noticeable odor.

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  • 16. 

    What quantity of oxygen, O2, contains very nearly the same number of molecules as 36.0 grams of water, H20?

    • 64.0 grams

    • 32.0 grams

    • 16.0 grams

    • 8.0 grams

    Correct Answer
    A. 32.0 grams
    Explanation
    The molar mass of water (H2O) is approximately 18.0 grams/mol. Since oxygen (O2) makes up about 32.0 grams/mol of the molar mass of water, we can conclude that 36.0 grams of water contains approximately 32.0 grams of oxygen. Therefore, the quantity of oxygen (O2) that contains the same number of molecules as 36.0 grams of water is 32.0 grams.

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  • 17. 

    Of the following, which atom has the smallest atomic radius?

    • S

    • AI

    • Na

    • Ba

    Correct Answer
    A. S
    Explanation
    Sulfur (S) has the smallest atomic radius among the given options. Atomic radius refers to the size of an atom, and it is determined by the distance between the nucleus and the outermost electron shell. In general, atomic radius decreases across a period from left to right on the periodic table. Sulfur is located to the right of sodium (Na) and barium (Ba) in the periodic table, so it has a smaller atomic radius compared to these elements.

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  • 18. 
    In which of the following is the battery short-circuited? - ProProfs

    In which of the following is the battery short-circuited?

    • A

    • B

    • C

    • D

    Correct Answer
    A. B
    Explanation
    The battery is short-circuited in option B.

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  • Current Version
  • Nov 06, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 26, 2014
    Quiz Created by
    Mackp17

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