AEPA Science 2 — Questions and Answers
Question 1: Which type of rock is formed from cooling and solidification of magma or lava?
- Sedimentary
- Metamorphic
- Igneous (Correct answer)
- Composite
Correct answer: Igneous
Igneous rocks form when molten material (magma underground or lava at the surface) cools and solidifies.
Question 2: Which of the following demonstrates Newton's Third Law of Motion?
- A ball rolling on a frictionless surface continues at constant velocity
- A rocket expelling gas downward and moving upward as a result (Correct answer)
- An object accelerating when net force is applied
- A heavier object falling faster than a lighter one
Correct answer: A rocket expelling gas downward and moving upward as a result
Newton's Third Law states that for every action there is an equal and opposite reaction, as seen in rocket propulsion.
Question 3: In the water cycle, which process involves liquid water converting to water vapor due to heat energy?
- Condensation
- Precipitation
- Infiltration
- Evaporation (Correct answer)
Correct answer: Evaporation
Evaporation is the phase change from liquid to gas when water molecules gain enough energy to escape the surface.
Question 4: A student constructs a model of a plant cell using household materials. Which science practice does this primarily address?
- Planning and carrying out investigations
- Developing and using models (Correct answer)
- Obtaining and evaluating information
- Using mathematics and computational thinking
Correct answer: Developing and using models
Building a physical model represents a structure and supports understanding of its components and functions.
Question 5: Which gas makes up the largest percentage of Earth's atmosphere?
- Oxygen
- Carbon dioxide
- Nitrogen (Correct answer)
- Argon
Correct answer: Nitrogen
Nitrogen comprises approximately 78% of Earth's atmosphere, making it the most abundant atmospheric gas.
Question 6: Which of the following best describes a food web in an ecosystem?
- A single pathway showing what one animal eats
- A diagram showing interconnected feeding relationships among multiple organisms (Correct answer)
- A chart of plant species in a habitat
- A list of producers only
Correct answer: A diagram showing interconnected feeding relationships among multiple organisms
A food web illustrates the complex, overlapping feeding relationships among all organisms in an ecosystem.
AEPA Science 2
Which type of rock is formed from cooling and solidification of magma or lava?