Science test earth science and magnetism

Hurst, yr 8, last yr8 topic test(s)

Climate change

long term change in global weather patterns

fire triangle

oxygen, heat and fuel

Combustion

The burning/ oxidation of fuel

Combustion products

Water and Co2

Fossil fuels

fuels formed from remains of dead plants and animals

Greenhouse gases

a gas which traps heat or thermal radiation, warming the planet

greenhouse effect

the warming effect caused by the presence of greenhouse gases in the atmosphere

global warming

the increase in global temperatures

crust

the outermost shell of the planet that consists of rock

mantle

semi solid middle layer of the planet, formed of rock

core

dense inner most layer, the outer core is liquid, the inner core is solid. Consists of iron and nickel

Pollution

Human activities release chemicals which have harmful effects in the envioment

the atmosphere

the layers of glass surrounding our planet

What is the earths crust divided into??

Tectonic plates

Three main types of fossil fuels??

Oil, gas and coal

Fossil fuel problems??

greenhouse gases lead to global warming. Pollution. Will eventually run out

Composition of the atmosphere?? (%)

78% nitrogen, 21% oxygen and 1% argon

Hydrogen test??

Squeaky pop test, lit splint

Oxygen test??

Glowing splint re-lights

Carbon dioxide test??

Bubble gas through limewater, colourless to cloudy

Respiration??

A reaction that releases energy from glucose/ food. Occurs in all living cells, glucose and oxygen to carbon dioxide and water

Photosynthesis??

A reaction which occurs in plants. Light energy is used with water and carbon dioxide to make glucose. Water and carbon dioxide to glucose and oxygen

Effects of global warming??

Extreme weather events, sea levels rising, extinction, change in disease patterns, floods and droughts

Three ways you can increase the strength of an electromagnet??

Add more coils, increase current, use a soft iron core

Opposites e.g north and south…

Same e.g north and north…

opposites attract and the same repel

Uniformed field?? (when drawing)

strait, parallel, evenly spaced lines