C1 Ocr Gcse Flashcards
What is it called when a gas to a liquid
Presipatation
What is an Exothermic reaction
Gives out energy, makes surroundings hotter
What is an endothermic reaction
Takes in energy, making surroundings colder
What is activation energy
Minimum amount of energy needed to break bonds
What was the earths atmosphere like for the first billion years
Mostly carbon dioxide with hardly oxygen
What happened after the earth cooled
Water vapour condensed which formed oceans
CO2 was dissolved into sea and was used in photosynthesis
Bacteria and animals evolved
What is the earths atmosphere like today
78% nitrogen
21% oxygen
1% other and argon
What is oxidation
The addition of oxygen to a reaction
What do greenhouse gases do
And what are they
They keep the earth warm
It’s gases like CO2, methane and water vapour
How is the earth heated up
The sun which gives off electromagnetic waves which is absorbed into earth
What contributes to climate change
Deforestation
Burning fossil fuels
Agriculture
Creating waste
What can climate change cause
Rise in global temp with causes; flooding, increase sea levels, ice melting
Changes in rainfall patterns which effects food
Frequency and severity of storms
How to reduce pollution
Use renewable energy sources
Cut waste
Control amount of green house gases company’s produce
What is the test for chlorine
You place litmus paper in the gas and if it bleached it’s chlorine
What is the test for hydrogen
Squeaky pop test
Put lit splint in gas and it should pop
