Question Challenge
Magnetic fields can be indicated using lines. The arrow on a magnetic field line shows
A) The direction of a magnetic field
B) The electrostatic attraction
C) The presence of an electric current
D) The strength of a magnetic field
Some units can be written in different ways. A pressure of 1 pascal is the same as
A) 1 joule per coulomb (1 J/C)
B) 1 joule per second (1 J/s)
C) 1 newton per square metre (1 N/m
2
)
D) 1 newton per kilogram (1 N/kg)
Select the ionic compound from the formula given
A) CH
3
Br
B) H
2
O
2
C) MgO
D) HCN
Sodium reacts with water and form
A) sodium oxide and hydrogen gas
B) sodium hydroxide and oxygen gas
C) sodium hydroxide and hydrogen gas
D) sodium oxide and oxygen gas
Which name is given to a group of individuals that can reproduce to produce fertile offspring?
A) a genus
B) a kingdom
C) a species
D) an organ system
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