Y7 Science Review of Learning Term 3

_{What is the hazard shown in this hazard sign?}

• Fireworks
• Broken Glass
• Explosive
• Corrosive

What does this symbol indicate?

• Corrosive substances

• Wash your hands.

• Wear appropriate gloves.

• Bacteria are present.

Tags

NGSS.MS-PS1-2

This lab student is wearing her googles and an apron. But what is she doing wrong?

• Pointing the test tube toward her while heating it.

• She actually is doing everything correctly.

• Her loose hair is too close to the fire.

• Not paying attention

• Oxidizing Liquid
• Flammable
• Explosive
• Acute Toxicity

What colour does litmus paper turn when added to an alkali?

• Blue

• Red

• Green

• Colourless

What colour does litmus paper turn when added to an acid?

• Blue

• Red

• Green

• Colourless

What other laboratory substance can you use to test if colourless substance is an acid or an alkali?

• Catalyst

• Salt

• Universal Indicator

• Water

What happens to the pH of an acid during neutralisation?

• It stays the same

• It moves toward pH 1

• It moves towards pH 7

• It moves towards pH 14

Tags

NGSS.MS-PS1-2

A wasp sting is alkali. Which substance would neutralise the sting?

• Vinegar

• Bleach

• Baking soda

• Distilled water

Which pH levels indicated a strong acid?

• 1-3

• 4-6

• 8-11

• 12-14