Science Flashcards

What is the function of mitochondria in a cell?

Answer: To produce energy (ATP) through cellular respiration

Mitochondria are the 'powerhouses' of the cell, generating adenosine triphosphate (ATP) through cellular respiration, providing energy for cellular functions.

Which layer of the Earth is composed of liquid iron and nickel?

Answer: Outer core

The outer core is a liquid layer composed primarily of iron and nickel, and its movements generate Earth's magnetic field through the dynamo effect.

What is Newton's Third Law of Motion?

Answer: For every action, there is an equal and opposite reaction

Newton's Third Law states that for every action force, there is an equal and opposite reaction force. Forces always come in pairs.

What process do plants use to convert sunlight into chemical energy?

Answer: Photosynthesis

Photosynthesis is the process by which plants use sunlight, carbon dioxide, and water to produce glucose and oxygen, converting light energy into chemical energy.

What is the difference between a chemical change and a physical change?

Answer: A chemical change creates new substances; a physical change does not

A chemical change results in the formation of new substances with different properties (burning, rusting), while a physical change alters appearance without changing the substance's identity (melting, cutting).

What is the role of DNA in living organisms?

Answer: To carry genetic instructions for development and functioning

DNA (deoxyribonucleic acid) contains the genetic blueprint that guides the development, functioning, growth, and reproduction of all living organisms.