Science 7

Big idea: Evolution by natural selection provides an explanation for the diversity and survival of living things

• Organisms have evolved over time: change in traits of populations over time
• Survival needs: all organisms need space, food, water. And access to resources in order to survive
• Natural selection: traits with greater fitness lead to reproductive advantage

Big Idea: Elements consist of one type of atoms and compounds consist of atoms of different elements chemically combined

• Elements, compounds and pure substances
• Crystalline structure of solids
• Chemical changes: atoms rearrange into new products

Big Idea: The electromagnetic forces produce both electricity and magnetism

• Electricity is generated indifferent ways with different environmental impacts
• Ways of generating electricity
• Electromagnetism

Big Idea: Earth and its climate have changes over geological time

• The fossil record provides evidence for changes in biodiversity over geological time
• First Peoples knowledge of changes in biodiversity over time
• Evidence of climate change over geological time and the recent impacts of humans
• Physical records
• Local First Peoples knowledge of climate change