SCIMAPETECH 2025 Elimination Round

Which of the following is a force that pulls objects toward the Earth?

• Friction

• Gravity

• Magnetism

• Electricity

What is the most abundant gas in the Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon dioxide

• Argon

Which process only occurs in meiosis but not in mitosis?

• Formation of the spindle fibers.

• Chromosome alignment at the equatorial plate.

• Pairing of homologous chromosomes.

• Disintegration of the nuclear membrane.

Which is the correct orbital diagram for carbon?

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Mountain climbers at Mt. Everest use gas tanks to allow them to breathe properly near its peak. What relationship between altitude and density is shown?

• Density is directly proportional to altitude.

• Altitude is inversely proportional to gas density.

• Altitude is not affected by gas density in the upper part of the troposphere.

• Gas density is proportional to air pressure without any relationship to altitude.

Which organelle is responsible for packaging and modifying proteins before they are transported out of the cell?

• Ribosome

• Golgi apparatus

• Lysosome

• Endoplasmic reticulum

Which of the following best explains why noble gases are generally unreactive?

• A. They have a high number of protons in their nucleus.

• B. Their outermost electron shell is completely filled.

• C. They have the lowest electronegativity values.

• D. They form stable covalent bonds with other elements.

What is the primary reason for Earth's seasonal changes?

• The Earth's distance from the Sun changes throughout the year.

• The Earth's rotational speed varies.

• The Earth's axis is tilted as it orbits the Sun.

• The Earth's gravitational pull affects solar radiation.

A 5 kg object is dropped from a height of 50 meters. Ignoring air resistance, what is its velocity just before it hits the ground? (g = 9.8 m/s²)

• A. 22.1 m/s

• B. 31.3 m/s

• C. 9.8 m/s

• D. 35.0 m/s

Which of the following feedback mechanisms has the greatest potential to accelerate global warming?

• Increased cloud cover reflecting more sunlight into space

• Melting permafrost releasing methane into the atmosphere

• Increased plant growth absorbing more CO₂

• Ocean currents slowing down due to freshwater input