Chemistry Revision Grade 7 | Baamboozle - Baamboozle

English 21 Public

Chemistry

Study Slideshow

What are atoms?

tiny particles of matter that make up everything.

15

What is an element?

a substance that is made of only one type of atom.

15

What are molecules?

a particle that contains two or more atoms bonded together.

15

What is a compound?

a substance in which the atoms of two or more different elements are bonded together.

15

What is a condenser and what is it used for?

is a piece of apparatus used for separating mixtures of liquids.

15

What is chromatography?

Is a method of separating mixtures of dissolved chemicals.

15

What is dissolving?

when particles of a substance mix completely with a liquid so that a transparent solution is formed.

15

What is a solvent?

a liquid that other substances will dissolve in.

15

What is a physical change?

In a physical change no new substances are formed and it can be changed back.

15

What is a chemical change?

In a chemical change a new substance is formed and it cannot be turned back.

15

What is the difference between a reactant and a product?

the reactants are the substances that react together. The products are the new substances that are made in the reaction.

15

How can you test for hydrogen gas?

You can use the squeaky pop test.

15

How can you test for carbon dioxide gas?

You can use limewater. Carbon dioxide makes limewater go cloudy.

25

What does the law of conservation of mass state?

it states that there is no loss or gain of mass in a chemical reaction.

15

What is a precipitate?

is an insoluble solid that forms from a reaction in a solution.

15

What is rust and what is the word equation?

Rust is formed when iron reacts with oxygen in the air. Iron + oxygen = iron oxide.

15