Exam: IELTS

Definition: A system used to send messages over long distances using radio waves instead of wires.

Example: The ship used a radiotelegraph to communicate with the coast guard during the storm.

Definition: A method of sending data over long distances using radio waves.

Example: The scientists used radiotelemetry to track the movements of the animals in the wild.

Definition: The process of sending and receiving sound through radio waves instead of using wires.

Example: The pilot communicated with the control tower using radiotelephony.

Definition: A healthcare professional who uses radiation to treat patients, often for cancer.

Example: The radiotherapist explained the treatment plan to the patient.

Definition: A medical treatment that uses radiation to kill or shrink cancer cells and other diseases.

Example: The doctor recommended radiotherapy as part of the cancer treatment plan.

Definition: A substance that contains a small amount of radioactive material, used in medical imaging or research to track processes in the body or other systems.

Example: The doctor used a radiotracer to help visualize the patient's organs during the scan.

Definition: A rare and radioactive metal that glows in the dark and is found in small amounts in certain minerals. It is used in medical treatments and in some types of paints that shine.

Example: Radium was once commonly used in cancer treatment before safer alternatives were discovered.

Definition: A straight line from the center of a circle to its edge, or the distance from the center to the edge of a circular area.

Example: The radius of the circle is five centimeters.

Definition: A colorless and radioactive gas that is produced when radium decays. It is used in medical treatments and scientific research.

Example: Radon can accumulate in homes and is important to test for due to its health risks.

Definition: To participate in a type of lottery where people buy tickets for a chance to win a prize.

Example: We decided to raffle off a bicycle to raise money for charity.

Definition: A type of lottery where people buy tickets for a chance to win a prize, and the winner is chosen randomly from those tickets.

Example: The school organized a raffle to raise money for new playground equipment.

Definition: To sell tickets for a chance to win a prize, usually in a drawing.

Example: The school decided to raffle off a new bicycle to raise funds.