Answer:

Activity 1.1

1. The spoon starts to increase its temperature.

2. After a minute the temperature of the spoon has changed it become very hot.

3. After removing the spoon from the fire its temperature started to lower.

4. yes, the spoon plays a role in the transfer of heat since its molecules allows heat to travel within the material.

5. heat is transferred in solid in a process known as conduction.

Activity 1.2

1. The plastic softens.when it was heated

2. Yes there is a change since the softened plastic begins to expand.

3. After the.plastic expands and was released it looks crumpled, then change is due to changes in temperature.

4. When plastic.was heated for several seconds its size was changed because it expands, while it was heated the molecules were able to move allowing expansion to occur

5. heat is transferred in gas through radiation.

Activity 2.1

1. When the cardboard were aligned the path of light is on straight line.

2. When it was misaligned the light was bent .

3.When the cardboard was returned to its original position the light goes straight to the holes again.

4. The light travels in a straight path when cardboard was aligned.

5. cant read the last question.