A machine that uses wind to create electricity.
Wind turbine
When a solid is absorbed by water, we say it d______.
dissolves.
These living things help reduce air pollution.
Trees
3 ways to reduce air pollution.
Walking, cycling, public transport
Moving air
Wind
Water falls from the sky as ____ or ____.
Rain or snow
2 solids that can form a solution in water. (both are yummy and begin with 's')
Salt and sugar
Objects that are lighter (less dense) than water will ____.
Float
Atoms which are far apart.
gas
The solid form of water.
Ice
These are the 3 main gasses in air. (hint: N, O, CO2)
Nitrogen, Oxygen, and Carbon Dioxide.
When solids are dissolved in water, it might change c_____.
colour
Air that is 'unclean' due to dust and smoke is called...
Air pollution
Air pollution is created by these 3 things.
Factories, cars, and forest fires.
If a solid cannot form a solution, it will either ____ on top or ____ to the bottom.
Float on top or sink to the bottom.
Atoms which are together but can easily move past each other.
Liquid
The gaseous form of water.
Water vapour
To burn things, we need a heat, fuel, and _____.
Air (Oxygen)
Land animals need air to ____.
breathe
4 places we can find water.
Lakes, rivers, oceans, or underground
Water is a compound made of two _______ atoms and one _____ atom.
Two hydrogen atoms and one oxygen atom (H2O)
Atoms which are close together.
Solid
Objects that are heavier (more dense) than water will ___.
Sink