Peswara - Science: States of Matter!

What is an irreversible change?

Answer explanation

What are irreversible changes? - BBC Bitesize

Tags

NGSS.MS-PS1-2

A __________ change is something that can be undone or put back to how it was before.

Answer explanation

Chemical reactions and reversible changes - BBC Bitesize

The three elements needed to produce fire are:

• heat, fuel and smoke

• heat, fuel and oxygen

• heat, a match and tissue paper

Answer explanation

Remove just one of these, and the fire can no longer burn. This makes the fire triangle very useful in fire prevention and firefighting.

The fire triangle - Combustion of fuels and the fire triangle - GCSE Chemistry (Single Science) Revision - WJEC - BBC Bitesize

Match the following to their definition:

• when a substance is mixed with a liquid and disappears

• state

• to change from a solid to a liquid through heating/pressure

• melting

• the process of burning something

• dissolves

• the structure or condition of something

• temperature

• a measure of how hot or cold something is

• combustion

Tags

NGSS.MS-PS1-4

Reorder the following to make a rocket!

• a chemical reaction occurs and gas is released

• bicarbonate of soda is emptied into the bottle

• Boom! Lift off...

• the vinegar is poured into the bottle

• a cork is inserted to block the gas escaping

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Match the following to their defintions!

• does not dissolve in a liquid

• solute/substance

• the material that is going to be used

• solution

• when a soluble substance dissolves into a liquid it creates this

• solvent

• dissolves in a liquid

• soluble

• the liquid that the solute dissolves into

• insoluble

Answer explanation

Tags

NGSS.MS-PS1-2