GACE Science (6–12) (717)

1. Question 1 · Physical Science

   Which subatomic particle determines the identity of an element?
   • A.Neutron
   • B.Electron
   • C.Proton
   • D.Isotope
   Show answer and explanation

   Answer: C. Proton

   The atomic number of an element equals the number of protons in its nucleus. Changing the number of protons changes the element itself. Neutrons affect atomic mass but not elemental identity.

2. Question 2 · Physical Science

   Which type of energy is associated with temperature?
   • A.Nuclear energy
   • B.Mechanical energy
   • C.Electrical energy
   • D.Thermal energy
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   Answer: D. Thermal energy

   Thermal energy relates to particle motion within substances.

3. Question 3 · Life Science

   During mitosis, what is the result of cell division?
   • A.Four genetically different haploid cells
   • B.One diploid and one haploid cell
   • C.Two genetically different cells
   • D.Two genetically identical daughter cells
   Show answer and explanation

   Answer: D. Two genetically identical daughter cells

   Mitosis produces two daughter cells that are genetically identical to the parent cell. This process supports growth and tissue repair.

4. Question 4 · Life Science

   Which human body system is primarily responsible for transporting oxygen and nutrients?
   • A.Digestive system
   • B.Circulatory system
   • C.Nervous system
   • D.Skeletal system
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   Answer: B. Circulatory system

   The circulatory system moves blood through the body, delivering oxygen and nutrients to cells.

5. Question 5 · Earth and Space Science

   Which factor most strongly influences climate?
   • A.Geographic location and latitude
   • B.Soil composition
   • C.Ocean waves
   • D.Daily temperature changes
   Show answer and explanation

   Answer: A. Geographic location and latitude

   Latitude determines the amount of solar energy received and strongly influences climate.

6. Question 6 · Physical Science

   Topic Name: Matter and Chemical Interactions

   Which statement best describes an element?
   • A.A mixture of different substances
   • B.A compound containing multiple elements
   • C.A substance made of only one type of atom
   • D.A substance that can be easily separated chemically
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   Answer: C. A substance made of only one type of atom

   An element consists of only one type of atom and cannot be broken down into simpler substances by chemical means.

7. Question 7 · Physical Science

   Which energy transformation occurs in a flashlight?
   • A.Light → Chemical
   • B.Chemical → Electrical → Light
   • C.Electrical → Nuclear
   • D.Thermal → Light
   Show answer and explanation

   Answer: B. Chemical → Electrical → Light

   Batteries convert chemical energy into electrical energy, which produces light.

8. Question 8 · Life Science

   Which cellular process produces the most ATP in eukaryotic cells?
   • A.Glycolysis
   • B.Electron transport chain
   • C.Krebs cycle
   • D.Fermentation
   Show answer and explanation

   Answer: B. Electron transport chain

   The electron transport chain produces most ATP during cellular respiration.

9. Question 9 · Life Science

   Which cycle describes movement of carbon through ecosystems?
   • A.Nitrogen cycle
   • B.Carbon cycle
   • C.Water cycle
   • D.Oxygen cycle
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   Answer: B. Carbon cycle

   The carbon cycle moves carbon between atmosphere, organisms, oceans, and soil.

10. Question 10 · Earth and Space Science

    What type of cloud is typically associated with thunderstorms?
    • A.Cumulonimbus
    • B.Cirrus
    • C.Stratus
    • D.Nimbostratus
    Show answer and explanation

    Answer: A. Cumulonimbus

    Cumulonimbus clouds produce thunderstorms and heavy precipitation.

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