TCAP Science 2 ā Questions and Answers
Question 1: Which layer of Earth's atmosphere contains the ozone layer that protects life from harmful ultraviolet radiation?
- Troposphere
- Stratosphere (Correct answer)
- Mesosphere
- Thermosphere
Correct answer: Stratosphere
The ozone layer is located in the stratosphere, approximately 15ā35 km above Earth's surface.
Question 2: A student observes that a metal spoon left in hot soup becomes warm. Which method of heat transfer is primarily responsible?
- Radiation
- Convection
- Conduction (Correct answer)
- Evaporation
Correct answer: Conduction
Conduction transfers heat through direct contact between the hot soup and the metal spoon.
Question 3: During meiosis, the resulting cells have how many chromosomes compared to the original parent cell?
- The same number
- Twice as many
- Half as many (Correct answer)
- Four times as many
Correct answer: Half as many
Meiosis produces four haploid cells, each with half the chromosome number of the diploid parent cell.
Question 4: Which type of rock forms when magma cools and solidifies deep underground?
- Sedimentary
- Metamorphic
- Intrusive igneous (Correct answer)
- Extrusive igneous
Correct answer: Intrusive igneous
Intrusive (plutonic) igneous rocks, like granite, form when magma cools slowly beneath Earth's surface.
Question 5: What happens to the wavelength of a sound wave when its frequency increases?
- Wavelength increases
- Wavelength decreases (Correct answer)
- Wavelength stays the same
- Wavelength doubles
Correct answer: Wavelength decreases
Since wave speed = frequency Ć wavelength, a higher frequency at constant speed means a shorter wavelength.
Question 6: Which organelle is responsible for packaging and shipping proteins to their destinations inside or outside the cell?
- Mitochondria
- Ribosome
- Golgi apparatus (Correct answer)
- Lysosome
Correct answer: Golgi apparatus
The Golgi apparatus modifies, packages, and dispatches proteins to their correct cellular or extracellular locations.
Question 7: A ball is thrown straight up. At the highest point of its path, which statement best describes its velocity and acceleration?
- Both velocity and acceleration are zero
- Velocity is zero; acceleration is 9.8 m/sĀ² downward (Correct answer)
- Velocity is maximum; acceleration is zero
- Both velocity and acceleration are at maximum
Correct answer: Velocity is zero; acceleration is 9.8 m/sĀ² downward
At the peak, velocity is momentarily zero, but gravitational acceleration (9.8 m/sĀ² downward) still acts on the ball.
TCAP Science 2
Which layer of Earth's atmosphere contains the ozone layer that protects life from harmful ultraviolet radiation?