Unit 5 Flashcards
What is an anology?
The idea to explain another
What has positive charge in sub-atomic particles?
Protons
Sub-atomic particles that has no charge
Neutron
What makes up a nucleus of atom?
Protons and Neutrons
Which sub-atomic particle has the least mass?
Electron
How much carat is a pure gold?
24 Carats
How much percentage of gold in a 9 carat gold?
37.5 percent
What was the average temperature of the earth’s early atmosphere in celcius?
400*C
Explain what global warming means?
The rise of global temperatureof the Earth.
How does ice cores help scientists?
The gas from the atmosphere were trapped in the ice cores. The deeper the ice that the gas came from, the older the sample.
How do we differenciate pure diamonds and diamonds mixed with other elements?
Pure diamonds are colourless and translucent while diamond that cnotains other elements are coloured.
How pure is a 92.5 percent of silver
925/1000
How does fossil fuel affect global warming?
It creates greater greenhouse effect.
Give me 4 ways of alternate sources to generate electricity
Wind, Solar, Tide, Hydropower
What is the evidence that our temperature is rising?
The rising of sea levels.
What is the formula of photosyntesis?
carbon dioxide + water ~> Glucose + Oxygen
What is the difference between weather and climate?
Weather happens in a short period of time in a small area while climate happens in long periods of time with a bit area.
What’s the difference between meteorology and climatology?
Meteorology is the study of weather
Climatology is the study of climate
Where did carbon dioxide get formed in the early atmosphere?
the gases of volcanoes
What is the nme of J.J Thompson’s atom model
The pudding model
Who discovered neutrons?
James Chadwick
Who discovered the nucleus and protons?
Ernest Rutherford
What did Ernest Rutherford get through the gold foil experiment?
there is a nucleus.
What is the difference between interglacial and glacial period?
Glacial period spreads further and faster than interglacial period
