Knowledge Check: Tuesday 23rd April

• Science
• Lower Secondary (Key Stage 3)

Knowledge Check: Tuesday 23rd April

Give 3 precautions we should take when handling acids in the lab.

What is an indicator? Why do we use them?

What colour did litmus paper go in an acid and an alkali solution?

Sort the keywords into the correct box.

Acid

Alkali

Both

Sour

Bitter

Irritant

Corrosive

Lemons

Vinegar

Toothpaste

Soap

Bleach

Wear googles

Match the keyword to the definition.

Lots of acid particles in less solvent.

Few acid particles in lots of solvent.

All the acid particles split up when dissolved.

Some acid particles split up when dissolved.

Concentrated

Dilute

Strong

Weak

Match each diagram to the correct description.

strong & dilute

strong & concentrated

weak & dilute

weak & concentrated