Question 1

Traces and remains of old living organisms that are preserved in the sedimentary rocks.

Accepted Answer

fossils

Answer

extinction

Answer

aurora

Question 2

Dinosaur's tooth from……………fossils

Accepted Answer

petrified

Answer

cast

Answer

mold

Question 3

Ozone hole appears over the ..........................

Accepted Answer

south pole

Answer

equator

Answer

middle east

Question 4

ozone layer allows 100% of the ......................UV rays to penetrate the Earth 's atmosphere .

Accepted Answer

near

Answer

far

Answer

medium

Question 5

pilots prefer to fly their planes in the lower part of stratosphere because ........................

Accepted Answer

no clouds exist and air move horizontally

Answer

there are weather disturbances

Answer

there is no traffic

Question 6

the snow crystal has ....................shape.

Accepted Answer

hexagonal

Answer

octagonal

Answer

pentagonal

Question 7

alkali metals are considered from ........................block groups .

Accepted Answer

S

Answer

P

Answer

D

Answer

F

Question 8

the atomic radius is used as a measurement  of the atomic size of the atom and its measuring unit is ............

Accepted Answer

picometre

Answer

meter

Answer

millimeter

Answer

nanometer

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