IOE Đăng Ký
IOE Đăng Nhập
IOE Hướng Dẫn
Từ Vựng Tiếng Anh
Luyện Nghe Tiếng Anh
Tìm kiếm đề thi tiếng Anh, bài học tiếng Annh - thật dễ dàng!
Giải Toán Trên Mạng
Học Từ Vựng Tiếng Anh
Câu hỏi thường gặp
Tiếng Anh Lớp 8
ViOlympic Tiếng Anh Lớp 8
Đề Thi ViOlympic Tiếng Anh Lớp 8 Vòng 5
Chọn câu trả lời tốt nhất cho những câu hỏi dưới đây.
The diagram above shows the relationship between photosynthesis and respiration. What are the products of photosynthesis?
energy and oxygen
glucose and oxygen
carbon dioxide and water
glucose and carbon dioxide
Vertebrates have a pair of round organs, each containing two chambers. The front chamber is filled with fluid and the back chamber is filled with a clear, jelly-like substance. The back wall of each organ contains many cells that are stimulated by light.
What is the function of these organs?
The diagram above shows exposed rock layers. Each rock layer contains a fossil of a different organism.
Which fossil most likely represents the oldest form of life?
Based on the diagram above, if Bulb 3 burned out, what would happen to the other bulbs?
Bulbs 1 and 2 would remain lit.
Bulb 1 would go out, and Bulb 2 would remain lit.
Bulbs 1 and 2 would go out.
Bulb 2 would go out, and Bulb 1 would remain lit.
Which best describes the motion of molecules in a solid at extremely low temperatures?
bumping together with some room to move
vibrating while closely packed together
moving freely and randomly in a space
sliding around one another and colliding
A beam of light is shining on the surface of a liquid.
Which diagram shows what happens when the light is refracted by the liquid?
An isolated population of fritillary, a species of butterfly, lives in a damp meadow. The fritillary larvae feed only on a species of violet plant that lives in the meadow. The adult fritillary does not fly far from the violet plants. One summer, a virus causes the violet plants to die.
As a result of the absence of violets, the fritillary population will most likely
increase and flourish
decrease to a level near extinction
switch to a different type of food
evolve immediately into a new species of butterfly
The graph above shows the changes in the populations of beetles and wasps. The wasp larvae feed on the beetle larvae.
The beetle population is highest when the wasp population is
The figure above shows an energy pyramid for an ecosystem.
What happens to the amount of energy in the pyramid as it moves up through the different levels?
It increases and then decreases.
It decreases and then increases.
The diagrams above show the constellation Cassiopeia as observed from the same position on Earth.
What causes this constellation to appear in different parts of the sky in different months of the year?
Earth’s rotation on its axis
Earth’s revolution around the Sun
changing phases of the Moon in its orbit around Earth
changing speeds of stars in their orbits around the Sun
Chủ đề liên quan
Học Tiếng Anh:
Từ Vựng Tiếng Anh Lớp 8
Viết Chính Tả Tiếng Anh Lớp 8
Tìm kiếm đề thi & bài kiểm tra Tiếng Anh
ViOlympic Tiếng Anh
Copyright © 2009 -
Điều khoản sử dụng
Theo dõi ViOlympic Tiếng Anh trên: