Chapter 5.1-5.4 Review Quizzz

What is natural vegetation?

• Plants that are used for farming

• Plants grown in urban areas by people

• Plant life that grows naturally without human interference

• Trees that are planted in parks and gardens

Answer explanation

Natural vegetation refers to plants that grow on their own, without being planted or managed by people.

Which factor affects the type of natural vegetation found in an area the most?

• Soil color

• Climate type

• Animal population

• Human population

Answer explanation

Different climates (temperature and rainfall) support different kinds of plants. For example, deserts have cacti while rainforests have tall leafy trees.

Fill in the blank: Tropical Rainforests are a type of natural vegetation found in parts

of the world which experience ________ ________.

Where are tropical rainforests mostly found?

• Near the North and South Poles

• Between the Tropic of Cancer and Tropic of Capricorn

• In deserts and tundra zones

• Only in Southeast Asia

Answer explanation

This region is called "the Tropics" and is known for hot and wet climates that support tropical rainforests.

Which of the following is NOT a characteristic of the tropical climate?

• Rainfall is experienced throughout the year

• High annual rainfall (around 2000 mm)

• Low average temperature below 10°C

• High temperature above 20°C

Answer explanation

Tropical climates are hot and wet, not cold. Temperatures stay above 20°C all year round.

Why are tropical rainforests called “evergreen”?

• They have high rainfall and temperature all year round, so trees don’t shed all leaves at once

• Their leaves change colour in different seasons

• The trees grow slowly and stay short

• Evergreen trees can survive in cold climates

Answer explanation

"Evergreen" means the forest stays green all year. Leaves fall off and grow back continuously, not all at once.

Which layer of the tropical rainforest is the tallest and sparsest?

• Canopy

• Undergrowth

• Shurb layer

• Emergent

Answer explanation

Emergent trees grow above all others (30–50m tall) and are widely spaced because fewer trees reach that height.

What is the main purpose of the canopy layer in a tropical rainforest?

• To trap animals

• To support the growth of crops

• To block sunlight and rainfall from reaching the forest floor

• To enable a diversity of plant life to grow

Answer explanation

The canopy is a thick and continuous layer of trees whose branches form a cover (interlocking crown) that blocks 97–98% of sunlight.

Why does the tropical rainforest have a large variety of plant species?

• Because it is located near cities

• Because of human planting

• Because it is cold and dry

• Because of high rainfall and sunlight throughout the year

Answer explanation

The constant warmth and water create ideal growing conditions for many different plants.

What is the relationship between climate and natural vegetation?

• Climate has no effect on vegetation types

• Vegetation types change randomly regardless of climate

• Climate (temperature and rainfall) influences the types of vegetation that can grow

• Vegetation determines the climate of a place

Answer explanation

Climate (temperature and rainfall) influences the types of vegetation that can grow. For example, tropical climates support rainforests, while dry climates support desert vegetation.