Class 1/3 - Fun with Science

What is safety symbol used in the lab.

• Acute toxicity

• Irritant

• Flammable

• Toxic to environment

Which are the correct rules in the Science Laboratory?

• Do not take apparatus or chemicals out of the laboratory without the permission of a teacher.

• Do not enter or work in the laboratory unless a teacher is present.

• Never taste chemicals or other materials unless specifically directed by your teacher.

• Eating and drinking are allowed in the laboratories.

• Damaged equipment, breakages, accidents and spillage should be immediately reported to your teacher.

Which instrument is most suitable to measure the mass of a stone?

• stopwatch

• electronic balance

• ruler

• measuring cylinder

State the hazard symbol.

• Irritant

• Corrosive

• Explosive

• Acute toxicity

In a solution, the liquid that dissolves the solid is the ________________.

• solute

• solvent

• water

• filtrate

When a solution is formed, it can appear _____________.

• milky

• clear

• white

• sandy

Which substance will float on water with a density of 1g/cm3.

• 2 g/cm3

• 0.2 g/cm3

• 1.6 g/cm3

• 1.01 g/cm3

A substance with pH 6 is ..................

• strongly alkaline

• weakly alkaline

• weakly acidic

• neutral

An acid turns blue litmus paper to.................

• green

• blue

• red

• white

Name this apparatus.

• beaker

• conical flask

• measuring cylinder

• pipette