Newton's Laws of motion
Evolution and Fossils
Chemistry
Chemistry 2
100
Inertia is the tendency of an object to stay at rest or keep moving at the same speed in the same direction.
What is Newton's first law of motion?
100
Charles Darwin
Who was the scientist who came up with the theory of evolution?
100
- bee stings contain acid and so they are treated with bicarbonate of soda because it contains a base that neutralises the acid. - wasp stings contain a base so they are treated with vinegar because it contains an acid that neutralises the base.
What are two common uses of neutralisation reactions?
100
- protons - neutrons - electrons
What is the structure of an atom?
200
Newton's second law of motion states "The acceleration of an object is determined by its mass and the force acting on it"
What is Newton's second law of motion?
200
Survival of the fittest, the process in which living things are best adapted to their environment to survive.
What does Natural Selection mean?
200
when a metal corrodes, it changes from a pure metal to a compound. Most metals change into metal oxides. Corrosion of iron is called rusting and it causes iron to change into iron oxide.
What is corrosion?
200
a compound is a substance made from two different elements joined together.
What is a compound?
300
Newton's third law of motion states "For every force there is an equal and opposite force"
What is Newton's third law of motion?
300
Fossils are the remains, traces or impressions of living things.
What are fossils?
300
When an acid reacts with a metal, salt and hydrogen gas is produced.
What are acid reactions?
300
hydrochloric acid HCl sulfuric acid H2SO4 sodium hydroxide NaOH sodium chloride NaCl calcium carbonate CaCO3 magnesium sulfate MgSO4
What are some common compounds?
400
Fossils will only form when conditions are right. - quick burial - suitable body parts - undisturbed rocks
When do fossils form best?
400
two elements combine to form a compound.
What are combination reactions?
400
an element is a substance that is made of only one type of atom. an atom is the smallest particle of matter.
What is an element and an atom?
500
the reverse of combination reactions.
What are decomposition reactions?
500
a substance that contains two or more atoms.
What is a molecule?
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