Materials and Cycles on Earth G8

.... have almost no mass

....have no electrical charge

Rutherford discovered the ... and the ...

• proton and electron

• proton and nucleus

• proton and neutron

• electron and nucleus

What percentage of 12 carat gold is gold?

The most common salt component found in the sea is ....

A picture of the weather conditions corresponding to Bangladesh is ....

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The study of weather is called ....

In .... period, there is permanent ice close to the north and south poles

The scientist is using an .... to extract a core sample from beneath the ice

The process....causes the appearance of oxygen in the atmosphere