1. Change Detectives
Chemical Science

2. Change Detectives
Term 2
Chemistry
TITLE PAGE

3. Assessment:
Pop quizzes averaged out.
One main quiz
One investigation
Book work of a high standard.

4. WALT understand: What the three states of matter are. What matter is.
What atoms are.
What elements are.

5. Ice Cube challenge
In a few lessons time you will be conducting an ice cube challenge. The investigation question will be something like ‘What can I do to an ice cube to get it to melt as fast as possible?’
Ask students if they think that the change to the ice cube is reversible? Once melted can I make it into ice again?

6. Lets learn a bit about chemistry…
DO NOT CLICK FOR IMAGE: What else can I do to water to change it? (Heat) What would happen if I heated water? What do you notice coming off the top of a saucepan of boiling water? Have you ever seen a fence after it has stopped raining and the sun hits it? What is this called? (Evaporation) What would we call the changed water? (vapour/steam – which is a gas) Can you think of somewhere that water can be in a solid or icy state, a liquid or watery state and a gas or vapour/steamy state?
Show image. Discuss.

7. Three states of matter:
While many substances may occur in solid, liquid or gas forms, water is the only substance that occurs naturally in all three states. The Earth has solid ice in polar regions, liquid oceans and gases caused by evaporation that we call water vapour.
Leave one page blank for a title page that we will work on later. Next is glossary page. This slide above is the first page of work in their new unit. This term their book work will be a part of the criteria sheet that I will be highlighting. Date it. Title it. Draw it. Write it.
I have used the word ‘matter’ in the title. This is an official scientific term but exactly what is matter?

8. You will need to draw this for the quiz:
Properties of states of matter:
Discuss and glue in copy for books.
You will need to draw this for the quiz:

9.
Watch.

10. What is Matter?
Matter is all the physical things in the universe. All the stars in the galaxies, the sun and planets in our solar system, the Earth, and everything on it and in it are matter.
All human-made objects, all organisms, the gases in the atmosphere, and anything else that has mass and takes up space, including you, are examples of matter.
‘Matter’ is a more scientific term for the ‘stuff’ the universe is made of.
Draw 3 images of objects/things that contain matter.
Copy this page neatly and draw three objects that are made up of matter.

11. This is in the quiz:
ANY OBJECT THAT OCCUPIES SPACE AND HAS MASS OR WEIGHT IS CALLED MATTER.
Copy this down and box it to remind you to study it and understand it.
All objects are made up of matter that contains parts that are so small that we can’t see them. These parts are very small. What is the word that we would use to describe them? (Microscopic) Clue- I would need a microscope to see them. They have a special name that we will discuss later.
These microscopic parts of objects are a little like what we learned in our last unit of work. Can you make the connection? (Micro-organisms that you can’t see with the naked eye.) Who thinks they can name what these basic parts of matter are?

12. Yes, it’s atoms!
Atoms are the basic building blocks of matter that make up everyday objects. A desk, the air, even you are made up of atoms! There are 90 naturally occurring kinds of atoms. Scientists in labs have been able to make about 25 more.

13. A LL MATTER IS MADE UP OF ATOMS
This is in the quiz:
A LL MATTER IS MADE UP OF ATOMS
Copy this down including image and box it to remind you to study it and understand it. Show one red lego block as a comparison. We will come back to this later.

14. Write first and third points only:
Atoms are the smallest bits of matter.
Democritus was an ancient Greek who lived about 460 BC. While he didn’t have a microscope he believed that matter was made up of particles too small to be seen or felt that could not be broken down to be any smaller. He called these particles ‘atoms.’ He believed that objects differ from each other because their atoms are not the same.
In Greek, ‘atom’ means indivisible.

15. What are elements?
Elements are substances that are made up entirely of a group of one type of atom.
E.g. Copper is an element with the
symbol CU.
One particle of copper is
an atom. A group of copper atoms
makes this lump of copper.
Copy this down. On the next slide I will show you a list of every known element that scientists have discovered. This is very interesting and you may get to learn more about it in high school. Before I show the table of all known elements show a clump of red Lego to explain that a number of the same type of atoms have grouped together to form an element.

16. Discuss this slide.

17. What are molecules?
Molecules are 2 or more different types of atoms that are connected by chemical bonds.
E.g. Water has two atoms of hydrogen and one atom of oxygen chemically bonded
together. We call this H2O for short.
Hydrogen is an element on the periodic table. Oxygen is also an element on the periodic table. When they are combined together with two H and one O it becomes H2O or water. The 118 or so known elements are the building blocks of all known matter in the universe. They are combined in different ways and with different amounts to make all the stuff of our world.

18. End of lesson discussion
End of lesson discussion. Turn and talk to revise WALT: Can you do it without your books?
What the three states of matter are. What their properties are and how they move.
What matter is.
What atoms are.
What elements are.
Whole class report.
Who will be studying this information in the next 24 hours? Shall I weebly this?