Bioplastics

Are ALL plastics degradable?

• No, only bioplastics

• Yes, but they degrade at different times

• Yes, all plastics degrade the same way

• No, only compostable plastics can degrade

Tags

NGSS.MS-LS2-5

NGSS.MS-PS1-3

What does biodegradable mean?

• Biodegradable means it can be broken down by bacteria and fungi

• Biodegradable means it can be broken down by water

• Biodegradable means it can be broken down by sunlight

• Biodegradable means it can be broken down by a hammer

Tags

NGSS.MS-LS2-3

If something is compostable, how fast must it degrade?

• 80% must degrade in a week

• Most of it must degrade in a month

• 60% must degrade in a year

• Most of it must degrade in half a year

What does a plasticizer do?

• A plasticizer makes a plastic more durable

• A plasticizer makes a plastic more rigid

• A plasticizer makes a plastic more flexible

• A plasticizer makes a plastic stronger

How does a cross-liking agent work?

• It connects polymer chains together, making the plastic stronger and more rigid

• It connects polymer chains together, making the plastic stronger and more flexible

• It connects polymer chains together, making the plastic more colorful

• It disconnects the polymer chains, making the plastic stronger

Where is starch found in nature?

• Starch is found in plants like grains and vegetables

• Starch is found in animal products

• Starch is found only in potatoes

• Starch is found in wood

Where is agar found in nature?

• Agar is found in plants like corn

• Agar is found in animals like pigs

• Agar is found in algae

• Agar is found in vegetables

What plasticizer is often added when making bioplastics?

• Borax is added as a plasticizer

• Corn starch is added as a plasticizer

• Casein is added as a plasticizer

• Glycerin is added as a plasticizer

What do all plastic-making recipes have in common?

• Heating up the material so it can be shaped

• Adding glycerin as a plasticizer

• Straining to remove the solids from the liquid

• Waiting 3-4 days for the plastic to dry

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Advanced question!

What bioplastic is this?

• Starch

• Gelatin

• Agar

• Casein