Atoms and earth test

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  • Created by: fam04
  • Created on: 12-03-14 20:16
There are about .... different elements from which all substances are made?
100
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All substances are made of...?
atoms
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atoms are made up of only....type of atom?
one type of atom
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what are chemical symbols used for?
represent atoms
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what do compounds contain?
more than one element
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what is the nucleus made of?
protons and neutrons
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protons have ..... charge?
positive charge
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electrons have .... charge?
negative charge
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neutrons have ..... charge
no charge
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the atomic number is the amount of...?
proton number
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The atomic number of an element is equal to the number of ...?
protons in the nucleus of its atoms
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How are elements arranged in the periodic table?
in order of their atomic numbers
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What does the mass number mean ?
its the sum of the protons and neutrons in the nucleus of an atom
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Group 0 consists of the ... gases?
noble gases
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What is the middle layer of the earth?
core
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what is the order of the structure of the earth starting from the centre?
inner core, outer core ,mantle, crust, atmosphere
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the earths limited resouces come from..?
its crust , the oceans and the atmosphere
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what shape is the earth?
almost spherical
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what is the diameter of the earth?
about 12800km
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the crust is a ...?
solid
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the mantle is ...?
almost solid but parts of it can flow very slowly
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the core is about ..the diameter of the earth?
half
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what surrounds the earth?
the atmosphere
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Why is the earths crust and upper mantle cracking?
because of tectonic plates which are constantly moving
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why do the tectonic plates move?
becasue of convection currents in the mantle that are caused by radioactive decay
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where do earthquakes occur?
where tectonic plates meet
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what formed the earths early atmosphere?
formed by volcanic activity
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What gases did the early atmosphere consist of?
carbon dioxide, water vapour, methane, ammonia
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when did the levels of oxygen increasein the atmosphere?
when plants spread over the earth.
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what was the miller urey experiment called?
primordial soup
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what did the miller urey experiment consist of?
hydrocarbons and ammonia with lightning providing energy
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Other cards in this set

Card 2

Front

All substances are made of...?

Back

atoms

Card 3

Front

atoms are made up of only....type of atom?

Back

Preview of the front of card 3

Card 4

Front

what are chemical symbols used for?

Back

Preview of the front of card 4

Card 5

Front

what do compounds contain?

Back

Preview of the front of card 5
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