FORMATIVE ASSESSMENT

Author:Jhara Roy

Jhara Roy Science Solutions for Exercise - FORMATIVE ASSESSMENT

Simple step-by-step solutions to FORMATIVE ASSESSMENT questions of Wastewater Story from Interactive Science 7. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from FORMATIVE ASSESSMENT with Hints & Solutions

MEDIUM
7th CBSE
IMPORTANT
Interactive Science 7>Chapter 18 - Wastewater Story>FORMATIVE ASSESSMENT>Q 1

Dirty water generated at homes and in industries.

MEDIUM
7th CBSE
IMPORTANT
Interactive Science 7>Chapter 18 - Wastewater Story>FORMATIVE ASSESSMENT>Q 2

The points at which the sewer pipes change their direction.

MEDIUM
7th CBSE
IMPORTANT
Interactive Science 7>Chapter 18 - Wastewater Story>FORMATIVE ASSESSMENT>Q 3

The method of water treatment in which major solid impurities are removed is called primary or secondary or tertiary treatment.

EASY
7th CBSE
IMPORTANT
Interactive Science 7>Chapter 18 - Wastewater Story>FORMATIVE ASSESSMENT>Q 4

Name two disease-causing insects.

MEDIUM
7th CBSE
IMPORTANT
Interactive Science 7>Chapter 18 - Wastewater Story>FORMATIVE ASSESSMENT>Q 5

Bacteria that get settled at the bottom of the tank. (Anaerobic digester/Activated sludge)

HARD
7th CBSE
IMPORTANT
Interactive Science 7>Chapter 18 - Wastewater Story>FORMATIVE ASSESSMENT>Q 1

All plastic products such as bottles, cans, toys and plastic sheets are an equal environment hazard as plastic bags. Discuss.

MEDIUM
7th CBSE
IMPORTANT
Interactive Science 7>Chapter 18 - Wastewater Story>FORMATIVE ASSESSMENT>Q 2

Why is chlorine added to clarified water?

MEDIUM
7th CBSE
IMPORTANT
Interactive Science 7>Chapter 18 - Wastewater Story>FORMATIVE ASSESSMENT>Q 3

What can be the reason behind allowing the growth of an aerobic bacterial in the aeration tank during the second step of sewage treatment?