Topic: Discuss the causes of the U.S. Civil War.

Topic: Experiments on animals should be banned. To what extent do you agree wit the statement?

Match the types of essay with their definitions

Skim the text and answer the questions.

New sensor could help doctors monitor patient progress from a distance

A self-powered sensor developed at the University of Waterloo could allow doctors to remotely monitor the recovery of surgical patients.

A The small, tube-like device is designed to be fitted to braces after joint surgery to wirelessly send information to computers, smartphones, or smartwatches to track a range of motion and other indicators of improvement. "That data would be continuously collected, so it would be as though the physician or physiotherapist was always there, always observing the patient," said Hassan Askari, an engineering doctoral candidate at Waterloo.

B The same sensor could also be used in a variety of other ways, including in tires of autonomous vehicles to detect and respond to icy roads.

C A prototype built and tested by the researchers combines electromagnetism and triboelectricity, a relatively new energy harvesting technique that involves bringing different materials together to produce current. When bent or twisted, the device generates enough electricity for sensing and powering electronic circuits for processing and wireless signal transmission.

D "The aim was to develop a sensor that works without having a battery attached to it," said Askari. "It is its own power source." That makes the device well-suited for applications that put a premium on reliability and where it would be difficult or expensive to replace worn-out batteries. Askari estimated the sensors — about six centimetres long and one centimetre wide — could be commercially manufactured for $5 to $10 each.

E Research is now focused on making them smaller and more sensitive using triboelectricity alone. Software is also being developed to process signals for tire application.

F When attached to the inside of tires, they could sense changing road conditions and instantly send information to control systems to enable self-driving vehicles to make adjustments. "Based on the forces, the interaction between the road and the tires, we could actually detect ice or rain," said Askari. "That is extremely important information for autonomous driving."

G Askari collaborated at Waterloo with fellow PhD student Ehsan Asadi, and engineering professors Amir Khajepour and Mir Behrad Khamesee, as well as doctoral student Zia Saadatnia and professor Jean Zu at the University of Toronto.

Which paragraph contains the following information?

NASA is the US space agency.

Aerospace engineering, the field dedicated to designing and building machines that float.

Aerospace engineering is not closely allied to aeronautics.

Most scientists agree that the threat of a large asteroid or meteor hitting the Earth is real.

The main branches of electrical engineering are telecommunications, power and lighting; and computer engineering.