General Science Practice Test Flashcards

Newton's first law of motion states that an object at rest will remain at rest unless acted upon by a(n):

Answer: Unbalanced net force

Newton's first law (law of inertia) states that an object's state of motion changes only when a net unbalanced force acts on it.

Which of the following is an example of a chemical change rather than a physical change?

Answer: Burning wood

Burning wood is a chemical change because new substances (ash, carbon dioxide, water vapor) are formed with different properties.

The process by which water vapor cools and turns into liquid water is called:

Answer: Condensation

Condensation occurs when water vapor loses thermal energy, slows down, and changes state from gas to liquid.

Which blood type is considered the universal donor for red blood cell transfusions?

Answer: Type O negative

Type O negative blood lacks A, B, and Rh antigens, so it can be transfused to patients of any blood type without triggering an immune reaction.

Which of the following best describes an element?

Answer: A substance made of only one type of atom

An element is a pure substance composed entirely of atoms with the same atomic number and cannot be broken down into simpler substances by chemical means.

What is the name of the force that opposes the sliding motion of two surfaces in contact?

Answer: Friction

Friction is the contact force that resists the relative motion between two surfaces and converts kinetic energy into heat.

In which phase of mitosis do chromosomes line up along the cell's equatorial plane?

Answer: Metaphase

During metaphase, chromosomes align at the cell's metaphase plate, ensuring each daughter cell will receive the correct number of chromosomes.