unit 24

Question 1

accelerate

Answer 1

v. To accelerate means to increase in speed. When he stepped on the gas pedal’ the motorcycle accelerated.

Question 2

anew

Answer 2

adv. If you do something anew’ you do it again’ possibly in a different way. Although he had failed his driving test’ he decided to try it anew.

Question 3

defect

Answer 3

n. A defect is a part of something that is wrong or missing. All these bottles have a defect and must be sent back to the warehouse.

Question 4

dreary

Answer 4

adj. If something is dreary’ then it is dull’ dark’ and lifeless. After the fire’ this section of forest is rather dreary.

Question 5

duplicate

Answer 5

v. To duplicate something means to copy it. She duplicated her friend’s movements like she was in front of a mirror.

Question 6

electromagnetic

Answer 6

adj. If something is electromagnetic’ it is related to electricity and magnetic fields. Different colors of light come from different levels of electromagnetic energy.

Question 7

electron

Answer 7

n. An electron is a particle in all atoms that has a negative electric charge. The number of electrons in an atom determines its charge.

Question 8

glide

Answer 8

v. To glide means to fly on extended wings with little or no effort. When the wind is blowing’ birds can glide easily through the sky.

Question 9

ingenious

Answer 9

adj. If someone is ingenious’ then they are very smart. Charles was the only person ingenious enough to repair the plane’s engines.

Question 10

innovation

Answer 10

n. An innovation is a product’ or an idea’ that is new or very original. Mrs. Johnson made a great innovation to the company’s business plan.

Question 11

innovative

Answer 11

adj. If something or someone is innovative’ they can think in creative ways. Since Peter was so innovative’ he was chosen to lead the science team.

Question 12

launch

Answer 12

v. To launch something means to make it go into motion. The boat launched from the dock and floated down the river.

Question 13

meteorological

Answer 13

adj. If something is meteorological’ it is concerned with the science of weather. The thunderstorm was so large that it became a great meteorological event.

Question 14

meteorology

Answer 14

n. Meteorology is the science that studies the weather. In order to understand the weather better’ you should study meteorology.

Question 15

penetrate

Answer 15

v. To penetrate something means to enter into it. The knife easily penetrated the surface of the orange.

Question 16

persistent

Answer 16

adj. A persistent person does not give up and keeps on working. They made persistent attempts to get him to eat.

Question 17

propulsion

Answer 17

n. Propulsion is the force that moves something forward. The propulsion lifted the rocket into the sky.

Question 18

Osimulate

Answer 18

v. To simulate something means to copy its actions or characteristics. The French language teacher could simulate the accent of a French citizen.

Question 19

spur

Answer 19

v. To spur someone means to urge them into action. The coach’s speech spurred her team into playing the best game of their lives.

Question 20

stimulate

Answer 20

v. To stimulate something means to cause or to increase activity in it. Doctors sometimes use electric shock to stimulate a patient’s heartbeat.