Chemistry - Atoms
The positively charged particles in atoms are known as?
Protons
What is the name of the substances that are made during a chemical reaction?
Products
According to what theory will the Universe end with particles spreading out so far they cool to absolute zero?
Big Chill
What is the name for the explosion of a massive star?
Supernova
How do animals obtain their carbon?
Feeding on plants
What is the electron configuration of magnesium (atomic number 12)?
2, 8, 2
What is the other name for an acid-base reaction?
Neutralisation
What is the concentrated point of energy from which the Universe originated?
Singularity
What is the name for a big cloud of gas and dust where new stars form?
Nebula
What does nitrogen form as a part of all living things?
Protein
What is the name of the first group of elements in the periodic table?
Alkali metals
What type of reaction forms one substance from many?
Synthesis
What type of reaction occurs inside stars to make new elements?
Nuclear fusion
The true brightness of a star is called its what?
Absolute magnitude
What process releases long-term stores of carbon back into the atmosphere?
Combustion
What element has the atomic number 7?
Nitrogen
What will form from the reaction of sulfuric acid and aluminum?
Aluminum sulfate and hydrogen gas
A star which is moving rapidly towards us will give off light with a short wavelength and what kind of frequency?
High
What diagram maps surface temperature of a star against its luminosity?
Hertzsprug-Russell diagram
Denitrifying bacteria convert nitrates to what?
Atmospheric nitrogen
What ion is formed from the element sodium?
Na+
What type of reaction is this?
Lead nitrate + sodium iodide -> lead iodide + sodium nitrate
Precipitation
The 'afterglow' is the non-scientific name for what phenomenon?
Cosmic microwave background radiation
The puff of gases given off from a red giant is called a what?
Planetary nebula
What bacteria are responsible for converting atmospheric nitrogen into ammonia?
Nitrogen-fixing bacteria