GED GED Science GED Science Exam Online Training
GED GED Science Online Training
The questions for GED Science were last updated at Jan 02,2025.
- Exam Code: GED Science
- Exam Name: GED Science Exam
- Certification Provider: GED
- Latest update: Jan 02,2025
Gases are one of three common states of matter and are affected by changes in temperature, volume, and pressure. When the pressure of a gas in a closed container becomes too high, it can cause the container to burst. The graph below illustrates the relationship between pressure and temperature (K) for ordinary gases.
Aerosol cans contain a pressurized gas that is used to propel, or spray, the contents out of the can. Many aerosol cans have labels that warn the users against incinerating (burning) them because of the danger of explosion.
What would happen to the pressure of the gas if the temperature inside the can increases?
- A . vary
- B . increase
- C . decrease
- D . remain the same
- E . increase, and then decrease
The pH of a liquid is a measure of its acidity or its alkalinity. Even small changes in pH of human blood can cause very serious health problems.
Carbon dioxide (CO2), is one of the dissolved gases present in healthy blood. CO2 normally mixes with the water in blood to form a mild acid, carbonic acid, which lowers the blood pH.If a health problem causes the dissolved carbon dioxide to increase or decrease, the blood’s pH would change and could produce an unhealthy pH level.
Based on this information, which statement best summarizes the blood condition that might result when an individual has a respiratory condition that causes the blood to contain too much CO2?
- A . The blood pH will remain the same.
- B . The blood pH will be lowered.
- C . The blood will be less acidic.
- D . The blood’s white cell count will be greatly decreased.
- E . The blood will clot more quickly.
— ExhibitC
When an object is being raised against gravity, work is being done. Gravity is the force that must be overcome to lift an object. The amount of work done is determined by how high the object is lifted and the mass of the object. The higher an object is lifted, the more work is done.
If each book in the diagrams has the same mass, which diagram shows the most work done?
- A . A
- B . B
- C . C
- D . D
- E . E
As plants grow, they absorb nutrients from the soil. Plant leaves can be carefully observed to determine the relative healthiness of the plant and whether it is suffering from a nutrient deficiency. The chart below shows the most common nutrient deficiencies and their effects on plant leaves.
Sometimes an observed symptom can have more than one cause.
Based on the information, which plant leaf symptom could have resulted from more than one type of nutrient deficiency?
- A . green leaves
- B . dark leaves
- C . yellow leaves
- D . small leaves
- E . distorted leaves
The results of a study of an experimental drug treatment seem to suggest that it is quite effective in treating an eye disease. The table below indicates the results of the use of the experimental drug therapy on 500 males who are 40C60 years old.
Based on the information and table, which statement is the best conclusion?
- A . Most of the human subjects in the study would have had a natural reversal of the symptoms even if they were not treated.
- B . The strong recovery rate of human subjects treated with established drug therapy makes the experimental drug therapy unnecessary.
- C . The experimental drug therapy shows promise, but it needs to be tested much more fully.
- D . The experimental drug therapy can now be used with any patient who has this disease.
- E . Similar results would have been obtained from a study of females in the same age group.
The sugars and starches in the human diet are broken down into glucose in the digestive system. This glucose passes from the small intestine into the blood. Human blood glucose levels are regulated by two hormones produced by the Islets of Langerhans in the human pancreas. The hormones are insulin, which lowers the level of blood glucose, and glucagon, which raises it.
Which statement best describes what happens after one eats a meal high in sugar and starches?
- A . The insulin level in the blood increases.
- B . No hormonal changes occur.
- C . The insulin level in the blood remains about the same.
- D . The insulin level in the blood decreases.
- E . The glucagon level in the blood increases.
Different enzymes in the human digestive system can digest food material only at specific levels of acidity (pH).
Based on the information, what can be concluded about enzymes in the digestive system?
- A . Enzymes become active in the large intestine.
- B . The digestive system contains few enzymes.
- C . Much of the food we eat cannot be digested.
- D . Food is digested only in the stomach.
- E . Different enzymes are active in different parts of the digestive system.
Our genes consist of DNA molecules. DNA fingerprinting allows the detection of DNA
fragment patterns in different people. In this process, enzymes are used to "cut" a person’s DNA into pieces. The length of these fragments differs from person to person and, therefore, there is little chance that two or more people will produce the same pattern. The DNA fragments of different people can be readily compared. DNA fingerprinting has many applications in law enforcement, medicine, and other areas.
The diagram below lists simulations of the DNA "fingerprint" band patterns for six individuals―a missing child and five young people who have the missing child’s physical characteristics.
Based on the DNA diagram, which of the five children might be related to the missing child?
- A . Child 1
- B . Child 2
- C . Child 3
- D . Child 4
- E . Child 5
Exhibit:
Based on the illustration, at which point on the ski slope above would the skier have the highest kinetic energy?
- A . 1
- B . 2
- C . 3
- D . 4
- E . 5
A scientist published his work in a scientific journal, and it generated much excitement in the scientific community. However, when other scientists across the world did the same experiment to try and repeat the results, it proved to be impossible.
When this type of event occurs, which statement describes the most important factor about a scientific finding’s acceptance by the scientific community?
- A . presented by a team of scientists
- B . reproducible by other scientists
- C . of considerable practical value
- D . published in a scientific journal
- E . based on an important concept
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