Atoms
There are over a hundred different types of atoms.
Atoms
Helium gas atoms make balloons float.
2. Liquids
Examples of liquids
3. Solids
Examples of solids
grains of salt and logs of wood
Materials have different properties that make them useful for different jobs. Here are some properties that materials have.
2. Metals
3. Plastics
4. Glass
5. Wood
6. Fabrics
1. Measuring length
2. Measuring mass
3. Measuring capacity
To read a scale, first work out how much each mark or division
on the scale represents.
5. 12-hour and 24-hour time
2. The water cycle
Water on the earth is constantly moving. It is recycled over and over again. This recycling process is called the water cycle.
a. Water evaporates into the air
The sun heats up water on land, and in rivers, lakes and seas and turns it into water vapour. The water vapour rises into the air.
b. Water vapour condenses into clouds
Water vapour in the air cools down and changes back into tiny drops of liquid water, forming clouds.
c. Water falls as rain
The clouds get heavy and water falls back to the earth in the form of rain or snow.
d. Water returns to the sea
Rain water runs over the land and collects in lakes or rivers, which take it back to the sea. The cycle starts all over again.
E = mc 2 :
Albert Einstein (14 March 1879 – 18 April 1955) was a German-born theoretical physicist. He is best known for his theory of relativity and specifically mass–energy equivalence, E = mc 2.
1 In the beginning God created the heaven and the earth.
2 And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
3 And God said, Let there be light: and there was light.