Cosmology
What is the most widely accepted theory that explains the origin of the universe?
The Big Bang theory
What does the term 'distance' mean?
How far an object has travelled.
What is located in the nucleus of an atom?
Protons and neutrons
State 2 pieces of evidence for the Big Bang theory
CMBR and red shift
State the equation for Newton's second law.
F = m x a
F = force
m = mass
a = acceleration
Magnesium has an atomic number of 12, state it's electron configuration.
2, 8, 2
What method did we use to estimate the length of the oval?
The parallax method
Use the formula s=d/t to calculate the average speed of an object that travels 150 in 10 seconds.
Give your answer in m/s.
15 m/s
Describe how you would balance this equation:
Na + O2 --> Na2O
4 in front of Na
2 in front of Na2O
What is the main thing that determines a star's colour?
It's (surface) temperature
Explain how you can use a speed time graph to calculate the distance an object has travelled.
Calculate the area underneath the graph.
Explain why increasing the concentration of reactants results in an increased rate of reaction.
Apparent magnitude can be used to describe how bright a star is. Explain why this measure of a star's brightness is confusing.
The brightest stars have negative values.
Explain why objects dropped from a height fall to Earth.
The force of gravity pulls them towards the centre of the Earth.
Mg is in group 2 and F is in group 17. Predict what the formula of magnesium flouride would be when Mg and F react. Explain your answer.
MgF2
One atom of Mg will lose 2 electrons when it reacts.
One atom of F will gain 1 electron when it reacts.