Revision

1. Beryllium has a Atomic Mass of 9, this means it has 4 protons and ___ neutrons.
4. In an electrically __ element, the number of protons and neutrons are the same.
7. Ecological pyramids show less species as the energy is lost in biological processes (digestion)and ___.
10. The interactions between the biotic and abiotic factors in an environment is termed an ___.
12. On a line graph, the __ variable is placed on the X axis.
13. The ___ and swap method is used to help write the chemical formulae for binary compounds.
16. A ___ has a different number of neutrons in its nucleus.
17. National parks, possum bridges and wildlife crossings are used as a conservation ___ to protect animals.
19. Electrons in an atom are ___ charged.

2. Cane Toads are classified as an ___ species in Australia as they did not originate here.
3. A food ____ shows the feeding relationship of multiple pathways of energy in an ecosystem.
5. Proton and neutrons in an atom are located in the ____.
6. The act of protecting Earth's natural resources is termed ___.
8. The Atomic Mass is the number of Protons and ___ in an atom.
9. The dependent variable is what is being ___ in an investigation.
11. An organism which only eats meat is termed ___.
14. An organism in a food chain which is the first to eat the producer is termed a ___ consumer.
15. The Law of Conservation of ___ states energy is only transformed/ changed in an ecosystem.
18. A biotic factor is the ___ things within an ecosystem.