Definition of Independent Variable, Dependent Variable and Control

Independent Variable:

The independent variable is something that is changed to make a base experiment so you can compare them.

Dependent Variable:

The dependent variable is how you measure the effects of your experiment. E.g. Time, amount of something, etc.


The control is something that is left unchanged to record the information. E.g. Photo, room temperature, etc.

GTAC Reflection Week 1

Today two people from GTAC came in to teach us about solids and liquids and how they behave and act. Their names were Chris and Maria. Chris studies forensics and biology and Maria studied anti venoms for snake bites.

We talked about how the particles in solids are packed together, but still have some space to move around, like play dough, they are called malleable solids. Some solids can change their shape but change back like elastic bands. Some other solids break easily and they are called bristle solids. Wood and glass are bristle solids.

We learnt this by doing some activities on solids. Such as we had to transfer play dough over to one beacon to the other, and take every one of its particles with it but we had to put it on a cup, with only a pair of tongs. We also had to act out what solid and liquid particles would look like. We pretended to be golden syrup particles, so we shook hands for three seconds tho show how and why their particles move. We were also water particles but shook hands for one second. The handshakes represented the bonds of the particles and how long they stick together for.

Then we talked about liquids. Liquids with low viscosity like water flow fast and freely, but liquids with high viscosity like golden syrup or honey flow slowly and stick together for longer.

I learnt that no matter how fine solid particles are, they are still solids if each grain holds their form. Something else I learnt was that each particle holds on to one another so it is very hard to take one particle away from a solid without taking others with it. Something else I learnt was that solids can still stretch and bend even if their particles are packed together.

Something I found interesting was that honey particles connect for longer than water particles, and that’s what makes them slower. Something else I found interesting was that solids like play dough are called malleable solids because they can be moulded into different shapes and hold their form and be stretchy.

I still don’t know what a liquid with a very very very high viscosity would be and how high they can be before they turn into solids. I still wonder if you put water in a freezer, when it is changing into ice, would its viscosity get higher and higher before it became ice?

I am looking forward to working with GTAC again and learning more about the four states of matter so I can get an even better understanding.