Lesson 19 The Nile River

Which of these is the best definition of a river basin?

• the area drained by a river and its tributaries.

• the source of a river and its tributaries

• the delta created by a river at its mouth

• the length of a river from its source to its mouth

What is the source of the Blue Nile?

• al-Sudd in South Sudan

• Lake Nasser in Egypt

• Lake Tana in Ethiopia

• Murchison Falls in Uganda

Which of these aspects of life in Egypt depends most on the water stored in Lake Nasser?

• annual flooding

• sewage treatment

• population growth

• perennial irrigation

What part of the Nile River basin does the statement describe?

This area has the richest farmland in all of Africa. Since ancient times, much of Egypt's food has been grown here.

• the al-Sudd

• the Nile Delta

• the land around Lake Nasser

• the land where the two Niles meet

Which of these created barriers to river travel on the Nile in ancient times?

• cataracts

• dams

• floodplains

• wadis

What was Egypt's main reason for building the Aswan High Dam?

• to enable leisure activities on the river

• to flood the river's barriers to shipping

• to stop sewage from flowing into the river

• to develop the river's hydroelectric potential

All of the following are benefits provided by hydroelectric dams except

• habitat loss.

• clean energy.

• flood control.

• irrigation water.

Which factors have put pressure on Cairo's water supply?

• environmental conservation efforts

• population growth and pollution

• political corruption and bribery

• high costs of dam repairs

Identify which response pairs each tern to the correct point on the diagram.

• A/runoff, B/infiltration, C/precipitation, D/condensation, E/evaporation

• A/evaporation, B/precipitation, C/runoff, D/condensation, E/infiltration

• A/condensation, B/runoff, C/ evaporation. D/infiltration, E/precipitation

• A/evaporation, B/condensation, C/ precipitation, D/infiltration, E/runoff

Which part of the water cycle directly leads to the formation of rivers?

• evaporation

• runoff

• infiltration

• condensation