4

Question 1

Compound

Answer 1

a chemical that combines two or more elements:
Salt is a compound of sodium and chlorine.

Question 2

Enormous

Answer 2

extremely large:
an enormous car/house

Question 3

Procastinate

Answer 3

Delay

Question 4

Accumulation

Answer 4

Gather

Question 5

Impact

Answer 5

the force or action of one object hitting another:
The impact of the crash reduced the car to a third of its original length.

Question 6

Magnify

Answer 6

to make something look larger than it is, especially by looking at it through a lens:
Although our skin looks smooth, when magnified it is full of bumps and holes.

Question 7

Trajectory

Answer 7

Path

Question 8

Lagging

Answer 8

a thick layer of material used to cover pipes, water tanks (= large containers), and other surfaces in order to stop heat from escaping or water from freezing

Question 9

Predict

Answer 9

Expect

Question 10

Margin

Answer 10

Edge

Question 11

Ally

Answer 11

a country that has agreed officially to give help and support to another one, especially during a war:
ally of sb During the First World War, Turkey was an ally of Germany.

Question 12

Blade

Answer 12

the flat part on a knife or similar tool or weapon, with a very thin edge used for cutting:
a sword with a steel blade

Question 13

Unleash

Answer 13

موجب شدن چیزی به طور ناگهانی

Question 14

Undetectable

Answer 14

impossible to notice or discover:
The moons of Jupiter are undetectable by the naked eye.

Question 15

Tangible

Answer 15

real and not imaginary; able to be shown, touched, or experienced:
We need tangible evidence if we’re going to take legal action.

Question 16

Plateau

Answer 16

a large flat area of land that is high above sea level

Question 17

Equivalent

Answer 17

having the same amount, value, purpose, qualities, etc.:
She’s doing the equivalent job in the new company but for more money.

Question 18

Tectonic

Answer 18

relating to the structure of the surface of the earth and the way it is formed, changed, and moved by forces inside it:
the motion of the earth’s tectonic plates (= sections of the planet’s surface)

Question 19

Linear

Answer 19

کشیده‌د دراز

Question 20

Reveal

Answer 20

to make known or show something that is surprising or that was previously secret:
He was jailed for revealing secrets to the Russians.

Question 21

Delicate

Answer 21

needing careful treatment, especially because easily damaged:
Peaches have delicate skins which are easily bruised.