Scientific Investigations
What is the purpose of an investigation in science.
To find answers, test ideas, or collect evidence.
What does the aim of an experiment tell you.
What you are trying to find out.
What are the three main parts of an atom.
Protons, neutrons, electrons.
What charge does an electron have.
Negative.
What does it mean when a mineral or resource is described as finite.
It will eventually run out.
In an experiment, which variable do you change.
The independent variable.
What does a hypothesis usually predict.
What you think will happen.
Where in the atom are the electrons found.
In shells around the nucleus.
How does an atom become positively or negatively charged.
By losing or gaining electrons.
Can you name a product made from Australian minerals.
Steel, aluminium, copper wire, cement, glass
Which variable do you measure.
The dependent variable.
Why do scientists record results in a table.
To organise data clearly.
What does the atomic number tell you.
The number of protons.
Can you name an element that exists as a diatomic molecule.
Oxygen, nitrogen, hydrogen, chlorine, fluorine, bromine, iodine
Can you name one way Aboriginal and Torres Strait Islander Peoples used natural materials.
Ochre for art; stone for tools; wood for weapons; shells for cutting
Why do you keep some variables the same.
To make the test fair.
What does a conclusion explain at the end of an experiment.
What the results mean and it answers the aim.
How many electrons fit in the first shell.
Two.
What is one physical property metals usually have.
They conduct electricity / are shiny / are malleable
What is one environmental impact of digging up a resource.
Habitat loss / pollution / soil erosion
What does validity mean in a fair test.
That the experiment actually tests what it is meant to test- changing only ONE variable and keeping the others constant/same
Why are graphs useful for showing results.
They make patterns easier to see.
What does it mean when an atom has a full outer shell.
It is stable.
What is one difference between ionic, covalent and metallic substances.
Ionic: transfer electrons; Covalent: share electrons; Metallic: sea of electrons.
What is one thing that affects how quickly a material breaks down.
Temperature / moisture / type of material / microorganisms