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Flashcards in Fizzes And Bangs Deck (36)
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1

What is the law of conversation of matter?

Matter cannot be created or destroyed but it can change it's form.

2

What is a physical change?

A change where no new substance is formed, it is easily reversable, there's no change in colour and a small change in temperature.

3

What is a chemical change?

A new substance is formed, change hard to reverse, change in colour, large change in temperature.

4

What are some examples of a physical change?

Melting, condensation, freezing, evaporation.

5

What are some examples of a chemical change?

Rusting, hard-boiling an egg, an apple browning, fireworks.

6

What is a solid?

In a solid, the attraction between particles binds them together and makes them hold their shape. The particles vibrate softly.

7

What is a liquid?

When a solid is heated, the particles vibrate faster until the attraction weakens and they are allowed to flow over each other, therefore forming a liquid.

8

What is gas?

If a liquid is heated, the particles begin to vibrate so fast that the attraction between them becomes so weak that the particles spread apart. They move in straight lines until they hit another particle or the side of their containers, therefore filling any container they are in.

9

What is mixing?

When two or more substances are mixed. Eg. Sand and iron fillings.

10

What is a solution?

Mixtures where a solute dissolves in the solvent. The solute particles surround the ones of the solvent, spreading them thinly through the solvent.

11

What is matter made up of?

Atoms that are constantly moving and held together by bonds.

12

What is mixing?

When two or more substances are mixed together. Eg. Sand and Iron fillings.

13

What is a solutions?

Mixtures where a solute dissolves in the solvent. The solute particles surround those of the solvent, spreading them thinly through the solvent.

14

What is decomposition?

A chemical change. Reactants break up to form two or more different products. Eg. Extraction of aluminium from ore.

15

What is synthesis?

A chemical reaction. Two or more reactants combine to form a single product. Eg sodium and chloride makes salt.

16

What is combustion or oxidation?

A chemical reaction. The breakdown of reactants using oxygen. Reg Rusting.

17

What is displacement?

A chemical reaction. One reactant replaces another to form products.

18

What is a molecule?

The smallest stable unit of a substance.

19

What is a compound?

Two different elements combined. All compounds will be molecules.

20

What is an element?

Some, but not all will be molecules.

21

Is rusting a chemical or physical reaction?

Chemical.

22

What is rusting?

The corrosion of iron from air or water.

23

How can one prevent rust?

Prevent oxygen and moisture from contacting the metal. By covering the surface with paint, plastic or oil. Covering it with sinc, which will react with the air instead of the metal. Alloying, which is mixing different types of metals with iron to make it more resistent.

24

What is quantative?

Mass, volume, length.

25

What is qualative?

Observations- subjective,

26

What are monomers?

Units that make up polymers. Can be same or different.

27

What are polymers?

Long chained molecules.

28

Lost some natural polymers.

Cotton, rubber.

29

List some synthetic polymers.

Polystyrene, polyethnylene, polycarbonate (PVC)

30

What is polymerisation?

The process of connecting monomers to create polymer chains.