Lab Safety
This protective equipment is worn to protect your eyes in the lab.
What are goggles?
Everything is made of these, which are far too small to see.
What are particles?
Of the three states of matter, this is the one that is easy to squash (compress).
What is a gas?
This is the name for a liquid changing into a solid.
What is freezing?
Gas pressure is caused by particles doing this to the walls of their container.
What is colliding (hitting)?
This is the only way you should travel around the lab.
What is walking?
Despite what many people think, particles in a solid are doing this around a fixed point instead of staying completely still.
What is vibrating?
These two states of matter can flow.
What are liquids and gases?
Water melts at this temperature and boils at this temperature.
What are 0°C and 100°C?
When a gas is heated, its particles are doing this.
What is moving faster?
A skull and crossbones on a bottle means the chemical is poisonous. This is the name of that hazard symbol.
What is toxic?
The forces between particles are strongest in this state of matter.
What is a solid?
Sugar, water and air are examples of these three states of matter, in that order.
What are a solid, a liquid and a gas?
While a solid is melting, its temperature is doing this.
What is staying the same?
If you heat a sealed can of gas, the pressure inside is doing this.
What is increasing?
To stay safe with electricity, keep it away from this, and check your equipment before you do this to it.
What is water, and turning it on?
In this state of matter, the particles are touching, randomly arranged, and slide over each other.
What is a liquid?
A gas can be compressed but a liquid cannot, because gas particles are far apart and have lots of this between them.
What is space?
Ethanol melts at −114°C and boils at 78°C. On a 35°C day, it is in this state.
What is a liquid?
Pressure rises when a sealed gas is heated because the particles move faster, hit the walls harder and do this more often.
What is colliding with the walls?
A flame, a skull and crossbones, and a hand being eaten away: these three symbols warn of these hazards.
What are highly flammable, toxic and corrosive?
In a correct particle diagram of a solid, the particles are drawn as this shape, all the same size, touching in neat rows.
What are circles?
A solid keeps its shape because its particles are held in fixed positions by strong ones of these.
What are forces (or bonds)?
A puddle dries faster than the same water in a glass, because evaporation only happens at this part of the water.
What is the surface?
Tyre pressure is lower in winter because the colder, slower particles cause fewer and weaker of these.
What are collisions (with the tyre walls)?