GED GED-Science 試験概要:

GED GED-Science 試験シラバストピック:

GED Science 認定 GED-Science 試験問題：

1. In a suspension, the particles are larger and tend to settle out; in a solution, the particles are microscopic and do not settle out. Pure substances contain only one compound and are not mixtures.
Exhibit:

The contents in the container probably represent which of the following?

A) a saturated solution
B) a suspension
C) a pure substance
D) a supersaturated solution
E) a dilute solution

2. There are usually thirty-two teeth in the mouth of an adult human. They are divided into four groups: incisors, canines, premolars, and molars. The diagram below shows the arrangement of these teeth in the mouth.

Which statement best explains why your teeth have so many shapes?

A) The different shapes allow all of the teeth to fit in your mouth.
B) All the teeth in your mouth are used for the same purpose.
C) Teeth allow you to swallow more effectively.
D) Each tooth has a specialized biting or chewing function.
E) The different shapes had a purpose in prehistoric man but not in the modern man.

3. The three common states of matter are solid, liquid, and gas. Most solids have a definite shape and size. Liquids have definite volume but not a definite shape. Gases have neither definite shape nor definite volume. Variables such as temperature, pressure, and the absorption or release of energy can affect a substance's state.
Which factor has the least effect on a substance's state?

A) surrounding temperature
B) air pressure
C) its chemical structure
D) its color
E) absorption of energy

4. The widespread use of antibiotics has created a frightening threat to our safety. While antibiotics have offered life-saving treatment for countless diseases, their misuse and overuse have contributed to the evolution of deadly bacteria that are resistant to treatment. Although there is a reluctance to give up the demand for antibiotics, most people accept scientists' warnings of impending catastrophe.
Which choice best explains why doctors now prescribe antibiotics less often than in the past?

A) Antibiotic use causes frequent digestive upsets.
B) Insurance does not cover many antibiotic prescriptions.
C) The newer antibiotics are too expensive for the average consumer.
D) Bacteria become resistant to treatment by certain antibiotics.
E) Time constraints prevent doctors from writing as many prescriptions.

5. Temperature is a measure of the average kinetic energy (motion) of individual particles in a substance. Thermal energy is the total combined energy of all the particles. When
comparing samples of the same substance, the total thermal energy of the sample depends on its temperature and mass.
Cheryl fills five containers with different amounts of the same substance as shown in the diagram below. The contents of all five containers are kept at the same 50(degrees) Celsius temperature.

To remain buoyant, an object must displace a mass of liquid equal to its own mass. Shown below are five identical corks each placed in small vials, containing equal volumes of liquids that have different salt concentrations. The solution with the highest concentration of salt will have the highest mass and will require the least displacement of liquid.

Based on the information and diagram, which vial has the greatest concentration of salt?

A) A
B) C
C) D
D) E
E) B

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