What is matter?
Name the three states of matter
Solid, liquid, and gas
Can matter change their state?
Yes they can
How many particles are in pure substances?
One
What do we use energy for? Give me examples.
Lights, heating, cooking, and electrical devices
What has a definite volume and shape?
Solids
Physical and chemical
How many particles are in mixtures?
two or more types of particles are in mixtures
Thermal insulators
or examples: wood, plastic, glass, rubber, wool and cotton
Why is it important to save energy?
To help protect our planet
What has a definite volume, but not a definite shape?
Liquids
Matter can change shape. What are the changes called?
reversible or irreversible
Water, salt, gold, diamond, oxygen
Tell me 3 examples of thermal conductors.
Many metals: aluminium, steel copper, and gold
Name two renewable sources.
Wind and solar/ the Sun
Gases
Hint: example of homogeneous - tea
heterogeneous - yogurt mixed with fruit
Homogeneous you cannot see the different particles; heterogeneous you can see the different particles
A metal pan - thermal conductor
A wooden spoon - thermal insulator
Tell me 3 rules you should NOT do, to save energy.
- use the heater when you feel cold, you should put on a sweater.
- don´t leave the lights on in a room
- don´t leave the fridge door open
- don´t take long showers
- don´t drive to school, you should walk or ride a bike
What instruments can we use to measure volume?
A beaker or cylinder
Different forms of matter can react and make a new form of matter.
Name 4 different methods to separate mixtures
Sieving, filteration, evaporation, distillation
Heat is thermal energy. Describe this process of heat.
Heat flows through matter. When things receive thermal engery, they heat up. When things lose thermal energy, they cool down.
2. Close the fridge, do not leave it open
3. Take short showers to save hot water
4. Put on a sweater when you are cold, do not use the heater
5. Recycle
6. Walk or ride your bike to school