TASC Science 1 — Questions and Answers
Question 1: What is the basic unit of life?
- Atom
- Molecule
- Cell (Correct answer)
- Organ
Correct answer: Cell
The cell is the basic structural and functional unit of all living organisms. All life forms are composed of one or more cells.
Question 2: What is photosynthesis?
- The process by which animals breathe
- The process by which plants convert sunlight into chemical energy (glucose) (Correct answer)
- The process of cell division
- The process of breaking down food
Correct answer: The process by which plants convert sunlight into chemical energy (glucose)
Photosynthesis uses sunlight, carbon dioxide, and water to produce glucose and oxygen, converting light energy into chemical energy stored in sugar molecules.
Question 3: What is Newton's First Law of Motion?
- Force equals mass times acceleration
- An object at rest stays at rest and an object in motion stays in motion unless acted upon by an external force (Correct answer)
- For every action there is an equal and opposite reaction
- Energy cannot be created or destroyed
Correct answer: An object at rest stays at rest and an object in motion stays in motion unless acted upon by an external force
Newton's First Law (Law of Inertia) states that objects resist changes in their state of motion unless an external force acts upon them.
Question 4: What is the pH of a neutral solution?
- 0
- 7 (Correct answer)
- 10
- 14
Correct answer: 7
A pH of 7 is neutral, meaning the solution is neither acidic nor basic. Values below 7 are acidic, and values above 7 are basic/alkaline.
Question 5: What type of rock is formed from cooled magma or lava?
- Sedimentary
- Metamorphic
- Igneous (Correct answer)
- Fossil
Correct answer: Igneous
Igneous rocks form when molten rock (magma underground or lava on the surface) cools and solidifies. Examples include granite and basalt.
Question 6: What is the function of mitochondria in a cell?
- Protein synthesis
- Energy production through cellular respiration (Correct answer)
- Cell division
- Waste removal
Correct answer: Energy production through cellular respiration
Mitochondria are often called the 'powerhouse of the cell' because they produce ATP (adenosine triphosphate) through cellular respiration.
TASC Science 1
What is the basic unit of life?