G9_HW_W26_U10_U10_DY1

Choose the best answer a, b, c or d to complete the sentence.

Orange trees and cactuses are both flowering plants,.......have seeds that grow.

• who

• which
• that

• what

Choose the best answer a, b, c or d to complete the sentence.

Many human activities cause ......., which is also called habitat destruction.

• climate change

• habitat loss
• ecological balance

• global warming

Choose the best answer a, b, c or d to complete the sentence.

A naturalist, ........ studies the natural world, often makes observations of the relationships between organisms and their environment.

• that

• which

• who
• what

Choose the best answer a, b, c or d to complete the sentence.

Mother Earth....... us with air to breathe, water to drink and food to eat.

• keeps

• protects

• provides
• produces

Choose the best answer a, b, c or d to complete the sentence.

Humans are cutting down too many trees on Earth, ...... lungs are jungles and forests.

• whose
• which

• who

• that

1. Choose the best answer a, b, c or d to complete the sentence.

2. _______ animals can cause ecological imbalances in Earth's ecology.

• Chasing

• Preserving

• Hunting

• Grazing

1. Choose the best answer a, b, c or d to complete the sentence.

2. The cycle of seasons brings major changes, ...... requires animals to adapt.

• whose

• that
• which

• who

1. Choose the best answer a, b, c or d to complete the sentence.

2. To keep the ecologies on Earth in ....... , we need to protect natural resources.

• reserve

• balance
• good

• protection

1. Choose the best answer a, b, c or d to complete the sentence.

2. Scientists use the Hubble Space Telescope, ....... began orbiting Earth in 1990, to observe and take pictures of planets.

• whose

• that

• who

• which

1. Choose the best answer a, b, c or d to complete the sentence.

2. One way to ......... people’s awareness of the need to protect our Earth is to follow the 3Rs.

• rise

• preserve

• protect

• raise