Trắc nghiệm từ vựng Unit 10 lớp 9 Planet Earth

The bamboo forest is the natural _______of the panda.

Scientists study the ________ to understand the formation and evolution of planets.

A species whose presence is critical to maintaining the ecological balance is called a keystone species. 

Many national parks are established to conserve the Earth's unique ________.

A food ________ shows you the order in which living things depend on each other for food.

Many factories ________ harmful pollutants into the atmosphere.

The mountain ________, the highest points of the mountain, are often covered in snow year-round.

Cuc Phuong National Park is the natural ________ for many rare species, both plants and animals.

With its diverse ecosystems and breathtaking landscapes, planet Earth is truly gorgeous. 

Flora and fauna are vital to the environment because they create __________.

Everyone can make a contribution to protect the environment.

A(n) ________ sunset over the savannah painted the sky with brilliant colours.