Given an example of a non-biodegradable material.
Answer may vary.
TRUE or FALSE: Absorbent materials like paper bags can protect our things when it is raining.
FALSE
What is this material that can hold water without absorbing it?
pail
TRUE or FALSE: When a material decays, it usually changes in color and odor.
TRUE
What property of a material refers to its ability to decay over time?
biodegradability
Why do oil float on top of the water?
Its density is less than the density of water.
How is this object useful to us?
It helps us float on water and keeps us from drowning.
TRUE or FALSE: Bacteria can cause food to turn bad.
TRUE
Give the three properties of materials that we discussed.
absorbency, buoyancy, and biodegradablity
What is the property of towel that makes it useful to us?
absorbency
What kind of materials sink on water?
Objects made of metal.
What do you call the property of a material to float or sink on water?
buoyancy
What do fruits, vegetables, and meat have in common?
They are all biodegradable.
What object can be recycled into a flower vase?
plastic container or can
TRUE or FALSE: Materials that decay easily can be recycled.
TRUE
TRUE or FALSE: Diamonds float on water
FALSE
TRUE or FALSE: Biodegradable materials take years to decay.
FALSE