Answer:
3. B
4. B
5. C
6. A
7. D
8. C
Step-by-step explanation:
3. A material or substance is said to be BRITTLE If it can be broken easily when there is an application of force e.g glass
4. A material that cannot conduct heat and electricity is called an INSULATOR. Among the given options, WOOD is a poor conductor of heat i.e. it cannot withstand hear. Iron, gold and copper are all metals, hence, very good conductors.
5. Matter which constitutes all substances tend to react with one another, however, when the observed trait or characteristic is called a CHEMICAL PROPERTY.
6. Physical property of matter can either be intensive or extensive. INTENSIVE PHYSICAL PROPERTY is that characteristic or trait of matter that does not depend on the amount. Example is temperature, density etc
7. PHYSICAL PROPERTY is the property of matter that can be observed or perceived with our senses easily without changing its chemical composition or nature. Example of physical property is melting.
8. Matter exists in three states; solid, gas and liquid. In the GASEOUS state of matter, particles are relatively far apart or scattered and practically independent of each other. This allows gas to be able to diffuse.