sodoo

It is a fact that substances cannot change their ...

• quantity

• matter

• combustion

• accurate

... means that no matter how a substance is changed, what it is made up of will always stay the same

• conservation of mass

• quantity

• combustion

• accurate

When scientists make a ...they succeed after trying very hard.

• quantity

• breakthrough

• accurate

• matter

1. Without oxygen there cannot ...- things cannot burn.

• accurate

• quantity

• combustion

• matter

... is what physical objects are made of.

• quantity

• breakthrough

• accurate

• matter

All classifications in chemistry need to be ...

• combustion

• quantity

• matter

• accurate

... believed that they could turn iron into gold.

• matter

• accurate

• alchemists

• properties

Mendeleev's table classifies the elements found in nature according to their ...

• conservation of mass

• breakthrough

• properties

• alchemists

The smallest part of a chemical element

• cells

• mites

• atom

• bacteria

The very tine creatures yhat live on plants or animals

• mites

• atom

• cells

• bacteria