Natural or Made?
Is wood a natural or made material?
Natural
Name a material that is soft.
Cotton, wool, rubber, etc.
What material is best for making a window?
Glass.
What happens if you put a paper towel or tissue in water?
It absorbs the water.
What happens to ice when you heat it?
It melts.
Is plastic natural or made?
Made
What does "waterproof" mean?
Water will not go through the material.
What material is best for making an umbrella?
Plastic or anything waterproof.
How can you test if a material is strong or not?
Bend or break it.
What happens to a liquid egg when you heat it?
It turns into a solid.
Name two natural materials.
Wood, straw, bamboo, clay, cotton, wool, rock, metal, sand, rubber, etc.
Which material is heavier: wood or metal?
Metal.
What material is used for making a bicycle?
Metal.
How can you test if a material is waterproof?
Pour water on it or put it in water and see if it soaks (absorbs) or stays on the surface (on top).
What happens to chocolate when you melt it?
It turns into a liquid.
Name two made materials.
Plastic, glass, ceramics, paper, etc.
Which material is smooth: sandpaper or a plastic bottle?
Plastic bottle.
Why do we use metal to make bridges?
Metal is strong and does not break easily.
Why do we test materials?
To see if they are good for the job.
Can paper change its shape? How?
Yes. Bending, rolling, cutting, tearing, etc.
What natural material is used to make glass?
Sand.
Why is metal a good material for cooking pots?
It is strong and conducts heat well.
Why is paper a silly material for a raincoat?
Paper is absorbent and will get wet easily.
If you drop a plastic cup and you drop a glass cup, which one will break? Why?
Glass cup. It is more brittle (breaks easily).
Can glass change its shape? How?
Yes. Breaking it.