Year 10 Tarawera High School

Wednesday, May 06, 2015

Block 2 Thursday 7th May: Science - What is an atom?

What is an Atom? / Oil and water on a molecular level


Re-cap from last lesson: Think/Pair/Share activities - Talk to the person next to you and write down your answers on a piece of paper.

  • How does oil behave when it's added to water?
  • What chemicals/products are used when cleaning oil off birds and why?
  • Explain how oil gets stuck in birds feathers?


Watch this clip if you did not see it last lesson - Why is it important to know about chemistry?

Question: Name 3 different ways we use chemistry in our lives?

New learning:


Watch the following clips and answer the 3 questions below:

  1. What is created when two elements combine?
  2. Name the two atoms that combine to create water.
  3. How many parts of each atom are there in H2O/water?


When we learning about at an atom, we are talking about tiny molecules.

This means we are looking at things on a molecular level.

For example, when talking about water on a molecular level we call water H2O. Two hydrogen molecules and one oxygen molecule.

i) Find a picture of and atom. Draw an atom in your books. Label each part of the atom - Nucleus, protons, neutrons, & electrons.

ii) Now find a picture of a water molecule. Copy the picture and draw water on a molecular level. It should have. Two hydrogen molecules and one oxygen molecule.


Watch these clips

Click here if you are having problems opening the clip


Why does oil and water not mix?

Write an explanation on a molecular level. Explain the what polarity is and how oil and water molecules have weak polarity and do not attract.

Draw diagrams to help show your understanding.


Take a look at our chemistry assessment. It is based on the chemistry of atoms, and polarity, and why water and oil do not mix. Also, it is about applying your knowledge on cleaning wildlife after and oil spill.

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