2. It is generated by the movement of electrons.
3. It is energy that is in motion.
4. It is everything around us, living and non-living things. Anything that has mass and volume.
5. Energy sources that are finite, so they will run out.
6. Coal is an example of ________________ energy source.
7. It is the amount of matter in a physical body.
8. Mixture in which all the substances are evenly distributed throughout the mixture.
9. It is plant and animal matter used as a renewable energy source.
10. It is energy produced when a force causes an object or substance to vibrate.
11. Name three examples of renewable energy sources.
12. We use this technique to separate iron and other components of a mixture.
13. When we leave on standby all our electronic devices, are they using energy?
14. Chemical change that happens when we burn wood.
15. The three states of matter.
16. It is the amount of space that a body occupies.
17. Putrefaction can only occur with ___________ matter.
18. We use this technique to separate the liquids and solids of a mixture. We usually use a strainer to do this.
19. We use this technique to separate two liquids in a mixture.
20. When I boil salt dissolved in water to get just the salt in the end, what technique am I using to separate the salt from the water?
21. They have got a fixed shape and volume.
22. They have a fixed volume and a changing shape.
23. It is the colour, size, shape, texture or luster of a substance.
24. Physical property of matter that occurs when we stir sugar in water.
25. Water changes its _________ when you raise the temperature of ice and becomes liquid water.
26. Is air matter?
27. It means creating new products from the ones we have already used.
28. It is a special type of oxidation. It produces light and heat in the form of fire. It occurs when substances, like wood or gasoline, combine with oxygen.
29. Water, oxygen and carbon dioxide are examples of these substances. They can’t be separate.
