Ok Kids, you re almost DONE! Let's see how far you have understood our lesson by answering the following questions orally.
1. Describe when do changes in materials become useful.
2. Describe when do changes in materials become harmful.
3. Observe the different materials around you. Give at least 2 examples of useful changes and another 2 examples of harmful changes that these materials undergo.
1. Describe when do changes in materials become useful.
2. Describe when do changes in materials become harmful.
3. Observe the different materials around you. Give at least 2 examples of useful changes and another 2 examples of harmful changes that these materials undergo.
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Answer:
1.A water in a plastic bottle
for example you drank all the water inside the plastic bottle so there will be no more water inside and u get to recycle the plastic bottle into a flower pot because you can plant on it.
2.A broken glass
for example you accidentally broke the drinking glass so it will break and if you hold the broken glasses it can hurt you.
3.useful changes
An old box
you can use an old box to put your things or old things in there
An old clothes
you can use an old clothes into a new one,you see you can dye them or either turn them into something new and useful.
harmful changes
An old battery
this is very harmful because if this gets in your eyes it can blind you and can also affects your skin
A broken mirror
this can hurt you if a mirror was broken it can make your hands bleeds because it was injured even if u didn't feel that it hurt you.