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TOEFL Practice
1 / 50
What invention revolutionized communication in the 19th century?
2 / 50
What is the capital of the United States?
3 / 50
Which process forms clouds in the sky?
4 / 50
What is the primary source of energy for life on Earth?
5 / 50
Which of the following is a mammal?
6 / 50
What is the boiling point of water at sea level?
7 / 50
What causes seasons on Earth?
8 / 50
How does recycling benefit the planet?
9 / 50
Which of these best describes DNA?
10 / 50
Why are wetlands important to the environment?
11 / 50
What happens during a solar eclipse?
12 / 50
Which layer of the atmosphere contains weather patterns?
13 / 50
Which planet has the most moons?
14 / 50
What is the main function of the skeletal system?
15 / 50
How does deforestation affect the environment?
16 / 50
Which invention most directly contributed to the rise of the internet?
17 / 50
Which blood cells fight infection in the human body?
18 / 50
Why do objects fall to the ground when dropped?
19 / 50
What type of rock is formed from cooled magma or lava?
20 / 50
What do plants release during photosynthesis?
21 / 50
What is the scientific study of human behavior and mind called?
22 / 50
What makes up about 70% of the human body?
23 / 50
Which ocean is the largest on Earth?
24 / 50
Which organ system is responsible for transporting blood throughout the body?
25 / 50
Which scientist developed the theory of general relativity?
26 / 50
What is biodiversity?
27 / 50
Why do earthquakes occur?
28 / 50
What is the water cycle process where liquid water becomes vapor?
29 / 50
Where does photosynthesis primarily take place in a plant?
30 / 50
Which of the following is a renewable energy source?
31 / 50
What is the term for animals that eat both plants and meat?
32 / 50
What is the function of the mitochondria in cells?
33 / 50
What caused the extinction of the dinosaurs, according to the most accepted theory?
34 / 50
Which element is most abundant in Earth's atmosphere?
35 / 50
What is the primary purpose of the ozone layer?
36 / 50
Which layer of the Earth lies beneath the crust?
37 / 50
What role do bees play in plant reproduction?
38 / 50
Why do birds migrate?
39 / 50
What is photosynthesis?
40 / 50
Which organ is primarily responsible for filtering blood in the human body?
41 / 50
Which planet is known as the Red Planet?
42 / 50
How do whales communicate over long distances?
43 / 50
What was the main cause of the fall of the Roman Empire?
44 / 50
What is the primary function of red blood cells?
45 / 50
Which ancient civilization built the pyramids?
46 / 50
Why is the Amazon rainforest called the lungs of the Earth?
47 / 50
Which of the following gases is a major contributor to global warming?
48 / 50
What causes soil erosion in modern farming?
49 / 50
What threatens coral reefs the most?
50 / 50
Coral reefs are often compared to:
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