Question | Answer |
What is the law of conservation of energy? | Energy cannot be created or destroyed. It changes from within a system. |
What is kinetic energy? | Refers to motion. |
What is potential energy? | Usually refers to height. |
What is DNA? | DNA is wound into chromosomes and is inherited material. |
What are genes? | Genes are segments or lengths of DNA. |
What is an allele? | An allele is an either a dominant or recessive trait inherited from our parents.For example, eye colour. |
Dominant verses Recessive? | Dominant- You only need one allele.
Recessive- You need both alleles. |
Homozygous verses Heterozygous? | Homozygous- Same allele.
Heterozygous- Different alleles. |
Mitosis verses Meiosis? | Mitosis- the multiplying/spiting of non-sex cells.
Meiosis- the splitting/ multiplying of sex-related cells. |
What is an atomic number? | The number on the periodic table and the number of protons. |
What is a mass number? | The number of protons + neutrons. |
Electron configuration? | 2, 8, 8, 2.
3rd shell can hold 10 more. |
What are groups? Which way? | Groups are the number of electrons in the outer shell, and they go vertically. |
What are periods? Which way? | Periods are the amount of occupied shells. They are horizontal. |
What is an ion? | An ion loses or gains to form a full outer shell. |
Why are compounds made? What are they? | Compounds are made so that each atom is neutral. For example, Mg2+ + 2Cl- = MgCl2 |
How do you balance an equation? | 1. Make shopping list
2. Work out how much more is needed.
3. Order correctly (numbers in front with brackets.) |