class 8th

Yogurt and cheese  can be produced from ___________.

• Bacteria
• Virus
• Protozoa
• Algae

Bacteria is known as ______________ in an ecosystem when feeding on dead organisms.

• decomposers
• herbivores
• pathogens
• infections

Tags

NGSS.MS-LS2-3

The smallest microorganism on earth is as _____________

• a virus

• bacteria

• algae

• fungi

Beneficial or Harmful?

fungus causes ringworm or athlete's foot on the skin

• beneficial

• harmful

Which of the following plastics objects can be recycled?

i). Electric socket ii). Polythene bag iii).PVC pipe iv). Ashtray

• A and B

• B and C

• A and D

• C and D

What are synthetic materials mostly made out of?

• Coal
• Oil
• Petroleum
• Natural Gas

Which of the following is a synthetic fibre?

• Terrywool
• Terrycot
• Terylene
• All of them.

Melamine is used for making

• kitchenware.
• floor tiles.
• fire-resistant fabrics.
• all of them.

Acrylic fibres are a substitute for natural wool.

• True
• False

Petroleum is mainly a mixture of which one of the following class

• Carbohydrates

• Carbogens

• Hydrocarbons

• Alcohols

Tags

NGSS.MS-PS1-1