Vocabulary
What are rivers?
Rivers consist of fresh water that flows over the ground, usually towards another body of water suich as an ocean, lake or another river.
We talk about rivers in three ________.
stages
In which phase does water vapor in the air rise and cool, turning into water droplets and ice, which form clouds?
Condensation
Groundwater exists because the ground absorbs ______.
precipitation
What are seas?
Seas are large bodies of salt water, but smaller than oceans.
What happens in the lower course of a river?
The river widens as it nears the sea or lake, forming an estuary
What is evaporation?
The phase in which heat from the Sun warms the water in seas, oceans, rivers and lakes. Some of this water becomes water vapour.
What causes natural springs?
When there is pressure underground that forces the groundwater up to the surface
What are oceans?
Oceans are large bodies of salt water.
What is a river basin?
All the land a river flows through
What is precipitation?
The phase in which water droplets combine and grow in size. When the droplets become bigger they become too heavy to stay in the cloud and fall to the ground.
What are man-made wells?
Holes that people dig in the ground to access groundwater, which they use for drinking water.
What are lakes?
Lakes are large enclosed bodies of fresh water.
What happens in a river's middle course?
It flows more slowly on gentle slopes and plains
What is collection?
The phase in which precipitation falls and collects in rivers and lakes. Some of the water falls on the ground and is absorbed, forming groundwater.
The _________ travels through the soil by finding routes in porous rocks.
precipitation/ water
What is a river basin?
All of the land a rivers flows through
What happens in a river's Upper Course?
A river is fast-flowing and travels down a steep slope, away from its source.
Precipitation sinks into the ground and collects to form ________.
groundwater/ aquifers
What are man-made water pumps used for?
To create more pressure to bring water to the surface.