Question 1

The ___________ of an isotope is the time in which it takes half of an initial amount of an isotope to decay into something else.

Options :

A : decay period

B : half-life

C : covalence coefficient

D : midlife decay point

Answer: B

Question 2

At an early age Jane showed a proclivity for music and dancing.

Options :

A : predisposition

B : interest

C : dislike

D : fever

Answer: A

Question 3

A ripsaw cuts __________.

Options :

A : against the grain of the wood

B : with the grain of the wood

C : most materials, including metal

D : only plastic

Answer: B

Question 4

When added to a cloud’s name, which of the following means rain?

Options :

A : Nimbus

B : Cirrus

C : Strato

D : Alto

Answer: A

Question 5

When an engine runs on after the ignition key is turned off, it’s called __________.

Options :

A : auto-ignition

B : sputtering

C : ignition recharge

D : ignition malfunction

Answer: A