MCAS MCAS Science and Technology/Engineering 1 — Questions and Answers
Question 1: What is the process by which plants make their own food using sunlight?
- Respiration
- Fermentation
- Photosynthesis (Correct answer)
- Transpiration
Correct answer: Photosynthesis
Photosynthesis is the process plants use to convert sunlight, water, and carbon dioxide into glucose and oxygen.
Question 2: Which of Newton's laws states that an object at rest stays at rest unless acted upon by an external force?
- Newton's Second Law
- Newton's Third Law
- Newton's First Law (Correct answer)
- Law of Conservation
Correct answer: Newton's First Law
Newton's First Law (inertia) states that objects remain in their current state of motion unless a net external force acts on them.
Question 3: What type of rock forms from cooled magma or lava?
- Sedimentary
- Metamorphic
- Igneous (Correct answer)
- Limestone
Correct answer: Igneous
Igneous rocks form when molten magma or lava cools and solidifies.
Question 4: What is the basic unit of life?
- Organ
- Tissue
- Cell (Correct answer)
- Molecule
Correct answer: Cell
The cell is the basic structural and functional unit of all living organisms.
Question 5: Which gas do humans exhale in greater amounts than they inhale?
- Oxygen
- Nitrogen
- Carbon dioxide (Correct answer)
- Hydrogen
Correct answer: Carbon dioxide
Humans produce carbon dioxide as a byproduct of cellular respiration and exhale it in greater concentrations than they inhale.
Question 6: What is the force that pulls objects toward the center of the Earth?
- Friction
- Magnetism
- Gravity (Correct answer)
- Tension
Correct answer: Gravity
Gravity is the force of attraction that pulls objects toward the Earth's center, giving them weight.
MCAS MCAS Science and Technology/Engineering 1
What is the process by which plants make their own food using sunlight?