免費一年的 GED-Science 題庫更新

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購買後，立即下載 GED-Science 題庫 (GED Science Exam): 成功付款後, 我們的體統將自動通過電子郵箱將您已購買的產品發送到您的郵箱。（如果在12小時內未收到，請聯繫我們，注意：不要忘記檢查您的垃圾郵件。）

最新的 GED Certification GED-Science 免費考試真題:

1. Work is done on an object when a force is applied, causing the object to move.

Which example best illustrates this scientific idea?

A) sitting on a chair
B) holding a box
C) pushing against a wall
D) standing in place
E) hitting a ball with a bat

2. -- Exhibit -
The most realistic description of energy flow through an ecosystem is a food web that represents an interconnected series of food chains. In general, the greater the number of alternative channels through which energy can flow, the greater the stability of the food web and the ecosystem.

The diagram shows a typical food web for a wet meadow. The hawk and the fox obtain nourishment by preying upon rabbits, frogs, snakes, and mice. The fox may even eat grasshoppers. If, for example, the rabbit population is reduced, possibly because of bad weather during the breeding season, the fox and hawk would shift their predatory pressure to other forms of prey. The rabbit population would then have a chance to bounce back and the ecosystem would remain stable.
-- Exhibit -
In the food web diagram shown, which organisms directly consume the grasshoppers?

A) frogs, foxes, and snakes
B) mice, foxes, and hawks
C) hawks, foxes, and snakes
D) frogs, snakes, and hawks
E) rabbits, foxes, and snakes

3. Mai Ling's lunch consists of a tuna fish sandwich on whole wheat bread with lettuce, a glass of milk, and carrot sticks.

According to the table at the left, which nutrient is missing?

A) protein
B) vitamin C
C) vitamin A
D) B vitamins
E) carbohydrates

4. A spring can be compressed or stretched. The amount of force that is required for a spring to return to its original position depends on its "spring constant." If the spring constant is large, thespring is rigid and difficult to stretch or compress. If the spring constant is small, the spring stretches and compresses easily.
The diagram below depicts the amount of compression that results for spring A and spring B after equal force is applied to both.

Which situation requires a spring with the largest spring constant?

A) The spring in a pinball game is used to release the ball.
B) A spring holds staples in a stapler.
C) A shock absorber spring keeps a truck from bouncing when it hits a pothole.
D) A child plays with a "Slinky" spring.
E) A jack-in-the-box springs out of its box.

5. Uma wanted to test her hypothesis that fescue grass grows best under red light. Independent variables, such as size of fescue grass plants, soil type, number of plants, and length of exposure to light were kept identical for both the experimental and control groups. Uma exposed the experimental group to red, green, and blue light and the control group only to sunlight. She took daily measurements of plant height for the next three weeks.
During the second week, Uma noticed that 8 of the 10 plants that she had exposed to red light looked a little wilted. She increased the daily water amount for these 8 plants. At the end of the experiment, she concluded that fescue grass grows best under red light.
What is a possible flaw in Uma's experiment?

A) plant an equal number of plants under each treatment
B) give equal amounts of water to all plants
C) monitor the plants in the control group
D) keep track of plant growth under each treatment
E) plant all samples in the same type of soil

問題與答案：