How much of the Earth's surface is covered by water?
What is "75%" or "three-quarters"?
What does water become when it freezes?
What is "ice"?
If we wash our hands with ___ water, we can wet them all over.
What is "soapy"?
If something is not safe, it is ___.
What is "dangerous"?
The water cycle is the journey water takes from the ___ to the ground and back.
What is "sky"?
Why can we not drink water from the ocean?
We cannot drink water from the ocean because it is salty.
When big drops of water are too heavy to float in the sky, the fall to the ground as ___.
What is "rain"?
Some birds and animals have ___ coverings so they can get water off them easily.
What is "waterproof"?
To be not covered is to be ___.
What is "exposed"?
The ___ that is dissolved in the ocean does not evaporate.
What is "salt"?
What gas is added to water to kill germs?
What is "chlorine"?
Clouds, fog and mist are like ___.
What is "steam"?
Boats and ships are ___ so they can move in the water easily.
What is "streamlined"?
The waste water system is called the ___.
What is "sewage works" or "sewage system"?
Water in the ocean changes to vapour because of the energy from the ___.
What is "Sun"?
The sea can be polluted by ___ and other substances from ships.
What is "oil"?
Why is it good that the surface of the water freezes first?
It's good that the surface of the water freezes so the animals and plants can live at the bottom of the water.
Several barges often travel together pulled by one barge that has an ___.
What is "engine"?
What do we call the place that makes electricity using water?
What is a "hydro-electric power station"?
Rain, snow and sleet are all examples of ___.
At the sewage system, the dirty water is put into big ___.
What are "tanks"?
Why do cars have cold water in their radiators?
The cold water takes away heat from the engine so cars don't get too hot.
Cacti have very long ___ that spread out to collect any rain or dew from a large area.
What are "roots"?
Make a sentence of at least six words using the word "current".
The leaves of the water plants move with the current.
Nimbus means that a cloud is heavy and ___ and will bring rain.
What is "dark"?