Biology
Chemistry
Physics
Random
100
If a trait is only expressed if it is present as two copies (homozygous) what is it called?
Recessive.
100
First element of the periodic table?
Hydrogen
100
How many waves are in this wave train?
5
100
What is the charge on an electron?
Negative
200
What is the pairing for the bases in DNA?
A pairs with T
C pairs with G
200
A chemical reaction that gives off heat is known as an _______________ reaction.
Exothermic
200
The frequency of a wave measured in decibels - True or False?
False - the frequency of a wave is measured in Hertz
200
Who developed the theory of natural selection?
Charles Darwin
300
What do the letters DNA stand for?
Deoxyribonucleic Acid
300
What is the maximum number of electrons in the second electron shell?
8
300
Newton’s first law of motion states that an object will remain in a constant state of motion or rest unless acted on by an unbalanced force. This is commonly known as _____________.
Inertia
300
It is estimated that the Earth is approximately 4.5 million years old - True or False?
False - approximately 4.5 billion years old!
400
What is the genetic cause of cancer?
Mutation(s)
400
Name this compound: MgSO4
Magnesium sulphate
400
The loudness of a sound is determined by the _______________ of the wave.
Amplitude
400
Who is the current prime minister of Australia?
Scott Morrison (ScoMo)
500
Albinism is a recessive condition in which affected individuals have little or no skin pigmentation. What is the probability that a heterozygous man and an albino woman will have an affected child?
50% chance their child will be 'aa' (affected)
500
Write the chemical formula for sodium hydroxide.
NaOH
500
Convert 49km/h to metres per second.
49/3.6 = 13.6 m/s
500
Which country has the most sheep in the world?
China - approx. 187 million sheep