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WorksheetsYr 9 Science half yearly revision
Total questions: 17
Worksheet time: 16mins
Identify which of the following is in the nucleus of an atom.
protein
neutron
electron
Calculate the number of electrons in calcium.
40.1
20
40.078
To calculate the number of neutrons in an element, which of the following would I use?
Look at the atomic number
Subtract the atomic mass from the atomic number
Subtract the atomic number from the atomic mass
Calculate the number of neutrons in calcium to one decimal place.
40.1
20.0
20.1
Which statement below is correct ?
2 (red) = groups and 1 (green) = periods
1(green) = groups and 2 (red) = periods
As you move from left to right on the periodic table which of the following is true about the atomic number?
Increases
decreases
stays the same
Which scientist used a beam of alpha particles to test the plumb pudding "choco cookie" model ?
Dalton
Bohr
Rutherford
What year did Bohr create his useful diagrams?
2018
1913
1909
What term describes these elements?
Metals
Isotopes
Nice o topes
Which of the following is an example of an isotope?
U235
plastic 246
U 1
Marie Curie was a famous female scientist who's work with isotopes eventually led to her death. What did they emit that make her sick?
light
heat
alpha, beta, gamma radiation
Why is it unsafe to place a metal knife in a toaster?
It will bend
It will conduct electricity
It will heat up
Alfred Wagener proposed which theory?
Continental drift
Plate tectonics
Continental soup
Wegener couldn't explain why continents move but later it was discovered that the mechanism was.........
convection currents
Conduction currents
radiation currents
Identify the name given to the land mass when all continents were joined 225 MA (million years ago)
Gondwana
Pangea
Laurasia
What is the term used to describe the northern hemisphere 150 Ma
Gondwana
pangea
Laurasia
Identify the name of theory that explains how tectonic plates move.
Continental drift
global tectonics
plate tectonics
