Genetics
Motion
Evolution
Chemistry
Scientific Method
100
How many dominant alleles are needed for a particular trait to be expressed?
1
100
What does Newton's First Law state?
An object in motion will remain in motion unless acted on by an outside force.
100
Which two scientists first proposed the theory of natural selection?
Darwin and Wallace
100
Valency is the name given to which part of an atom?
The outer shell electrons
100
What is the name of the variable that is purposefully changed during an experiment?
Independent variable
200
What alleles are present in the heterozygous situation?
One dominant (capital) and one recessive (lower case)
200
What does Newton's Third Law state?
For every action, there is an equal and opposite reaction.
200
What is a mechanism that drives evolution?
Natural selection, mutation, genetic drift
200
How many atoms are present in the molecule HNO3
5.
1 hydrogen, 1 nitrogen and 3 oxygen
200
Which variable goes on the y-axis of a graph?
Dependant variable
300
An organism with 2 identical alleles for a trait is called...
Homozygous
300
In a Distance - Time graph, what does a slope of constant gradient represent?
The object is travelling at a constant speed.
300
Fossils can be used as evidence for evolution, which type of rock are they most likely to be found in?
Sedimentary
300
What does the pH scale measure?
Acidity/Alkalinity.
This is a measure of the concentration of H+ ions
300
Validity is a measure of...
How accurately the experiment measures what it intended to measure. Through the strict control of all other variables.
400
This was the scientist who first began studying heredity and genetics.
Gregor Mendel
400
In a Speed- Time graph, what does a slope of constant gradient mean?
Smooth acceleration
400
What are 3 examples of evidence for evolution?
Fossil record, Biochemistry, Embryology, Comparative anatomy, Geographic distribution of species (biogeography)
400
What are common producs of combustion reactions?
Water + Carbon dioxide
400
Reliability refers to.....
How precise repeated experiment results would be. If you conducted an experiment 5 times and found the same result each time, it is a sign of reliability.
500
If organisms with alleles of Bb and Bb breed, what is the chance their offspring will inheret the recessive trait?
25%
500
How fast would a 20kg block accelerate if it was pushed with a force of 50N?
From: f=ma
a=f/m
a=50/20=2.5m/s
500
When an acid reacts with a carbonate, the products are water, salt and a gas. What is the name of this gas?
Carbon dioxide