Life and Physical Sciences Flashcards

What is the role of DNA in living organisms?

Answer: To store and transmit genetic information that directs the growth and function of cells

DNA (deoxyribonucleic acid) carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms.

What is the law of conservation of energy?

Answer: Energy cannot be created or destroyed; it can only change from one form to another

The law of conservation of energy states that energy cannot be created or destroyed, only converted from one form (e.g., kinetic to potential) to another.

What is the function of the circulatory system in the human body?

Answer: To transport blood, oxygen, and nutrients to cells and remove waste products

The circulatory system uses the heart, blood, and blood vessels to deliver oxygen and nutrients to cells and carry away carbon dioxide and other waste.

What is the difference between a renewable and a non-renewable energy source?

Answer: Renewable energy sources are replenished naturally over short periods; non-renewable sources take millions of years to form and can be depleted

Renewable energy (e.g., solar, wind, hydro) is naturally replenished, while non-renewable energy (e.g., coal, oil, natural gas) exists in finite amounts and takes millions of years to form.

What happens during photosynthesis?

Answer: Plants use sunlight, carbon dioxide, and water to produce glucose and oxygen

Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to produce glucose (food) and oxygen.

What is the pH scale used to measure?

Answer: The acidity or alkalinity of a solution, ranging from 0 (most acidic) to 14 (most alkaline)

The pH scale measures how acidic or basic (alkaline) a solution is, with 7 being neutral, below 7 acidic, and above 7 alkaline.