GED SCIENCE TEST

1. The domestic cat is often valued as a mouse catcher , which group of mammals is the domestic cat a member?
1. Carnivore
2. Cetaceans
3. Marsupials
4. Rodent
5. Primate
2. Which of the following characteristic is key to classifying kangaroos as marsupials?
1. powerful hind legs
2. long feet
3. front paws used for grasping
4. a pouch where the young stay after birth
5. production of milk by the mother
3. An object floats if its density is less than that of water.
An object sinks if its density is greater than that of water.
A solid steel cube will sink when placed in water , but a steel ship will float , which of the following is the best best explanation for why a steel ship floats?
1. When a steel ship’s hull is intact and it isn’t overloaded, it will not sink.
2. Steel is denser than water.
3. Steel is less dense than water.
4. The steel and air in a ship are less dense than water.
5. The steel and air in a ship are denser than water.
4. Cellular respiration is a series of chemical reactions in which complex fat, protein and carbohydrate molecules are broken down, giving off energy in living organisms.

What is the purpose of cellular respiration?
1. to break down fat molecules
2. to build protein molecules
3. to releases energy
4. to take in food molecules
5. to use up carbohydrate molecules
5. Potential energy is an object’s ability to do work because of a change in its shape or position.
Based on the information above, which of the following objects has potential energy?
1. a stretched rubber band
2. a large boulder
3. a cement sidewalk
4. a building
5. a train track
6.To quickly cool a bottle of soda pop, Jenny placed it in the freezer at noon. She forgot about the glass bottle until 6:00 P.M. When she opened the freezer, she found the bottle in pieces.
What is the best explanation of what happened?
1. Lowering the temperature of glass below freezing causes glass to break.
2. The soda pop expanded as it froze and broke the bottle.
3. The water vapor in the freezer expanded as it froze and crushed the bottle
4. As the bottle froze, the glass expanded until it broke.
5. The soda pop froze more quickly than the bottle.
7.Transpiration is a process in which a plant loses water through tiny pores called stomata, located on the undersiders of its leaves. Transpiration cools the plant and helps ensure a continual flow of mineral-rich water up the stem.
Which of the following serves humans in a similar way?
1. taste buds
2. hair follicles
3. sweat glands
4. fingernails
5. skin cells
8.Suppose that on Monday you flip a penny and it lands heads up. You then flip the same penny on Tuesday, and it again lands heads up. On Wednesday you flip the penny once more.
Which of the following is true about the flip on Wednesday?
1. The penny is equally likely to land heads up to tails up.
2. The penny is more likely to land heads up than tails up.
3. The penny is more likely to land tails up than heads up.
4. The penny will land heads up for sure.
5. The penny will land tail up for sure.
9. An object that is biodegradable is naturally decomposed (broken down into simpler substances) by living things in the environment.
Which of the following would most likely be classified as biodegradable?
1. a plastic milk container
2. a rusting piece of iron
3. a crumbling ancient rock wall
4. a fallen dead tree
5. an abandoned automobile tire
1. to prevent anyone from seeing into the oven
2. to keep microwaves from leaving the oven
3. to protect the door against breakage
4. to keep heat from leaving the oven
5. to keep room light from getting into the oven
1. freezing meat
2. evaporating water
3. soaking up spilled pop with a paper towel
4. putting cream in coffee
5. using an air freshener
1. Alcohol affects some body organs more than others.
2. People who drink a lot tend to ignore their nutritional needs.
3. When pregnant women drink alcohol , the developing fetus can be harmed.
4. Seventy percent of drivers killed in one-car accidents had been drinking alcohol shortly before the accident.
5. One can of beer contains the same amount of alcohol as one glass of wine.
13. The fossil record consists of the preserved remains of long-dead organism that have been studied by scientists. The fossil record provides clues about how and when organisms evolved.

For which of the following would the fossil record be useful?
1. predicting which modern species will eventually die out
2. plotting the evolutionary relationships among extinct organism
3. determining the life span of an individual member of a modern species
4. calculating how long ago Earth first formed
5. measuring the number of species on Earth today
Heat from the sun causes large amounts of water from the oceans and from freshwater sources to evaporate, or change to a gas called water vapor. Plant and animals also give off water vapor as a byproduct of cellular respiration . When the air cools, water vapor condenses, or turn back into liquid water, forming clouds.Finally, the water droplets in clouds become heavy, and they fall to Earth in the form of rain or snow. The constant circulation of Earth’s water is called the water cycle.

14.Which of the following best explains how clouds form?
1. water vapor in the air condenses into droplets.
2. Droplets of water in the air evaporate
3. Droplets of water in the air become heavy
4. Heat from the sun reacts with gases in the air
5. Warm air above Earth combines wit cool air on the surface
15.Which of the following is most similar to Earth’s water cycle?
1. snow falling to the ground and then melting
2. water running down the bathroom walls after someone takes a hot bath
3. plants taking in carbon dioxide and releasing oxygen
4. drinking a glass of water when you are thirsty
5. ice cubes melting on the counter and refreezing in the freezer
16.Convergence is the tendency of unrelated species to develop similar structures in order to adapt to similar environments. For example, the wings of a bat(a mammal) and those of an eagle are (a bird) are similar, even though the bat and eagle are not closely related. Both evolved to adapt to life in the air.
Which of the following is an unstated assumption important for understanding this paragraph?
1. Convergence is the tendency of unrelated species to develop similar structures
2. The structures are adaptations to life in similar environments.
3. The development of convergent structures occurs gradually, over millions of years.
4. Both bats and eagles have wings, even though the two species are not closely related.
5. The wings of bats and eagles evolved as adaptations to life in the air.
17. Ecological succession occurs when a community of interacting organisms is gradually replaced by a different community of interacting organisms.
Which of the following is the best examples of ecological succession?
1. Farmland is abandoned, grasses and shrubs move in, and eventually the area becomes forested.
2. A tundra ecosystem is inhabited by mosses, lichens, and grasses, and animals migrate in and out seasonally.
3. Tropical grasslands alternate between a rainy season and a dry season each year.
4. Intertidal zones undergo radical changes each day as the tides go in and out
5. Forest are bulldozed to make way for a suburban development of house and strip malls.
18. Dry cell batteries produce small amounts of electric current by means of a chemical reaction. When the supply of chemicals is used up, the battery is dead.
Which of the following items is best suited for being powered by electric current from a dry cell battery?
1. a washing machine
2. a toy truck
3. a car
4. a motorized wheelchair
5. a doorbell
19. Earth passes through periods called ice ages, when much of its surface is covered with glaciers-huge sheets of ice. During an ice age the temperature on Earth drops about 42.8*F(6*C) lower than the temperature today. Land formations are changed, and species of animals and plants die out.
Which of the following is a hypothesis that attempts to explain why an ice age begins?
1. The next ice age may begin within the next million years.
2. Variations in the energy output from the Sun may lower Earth’s temperature.
3. An ice age may have been responsible for the extinction of dinosaurs.
4. An ice age is a time during which much of Earth’s surface is covered with ice.
5. During the last ice age, the average temperature of Earth was about 42.8*F lower than it is today.
20. While on the surface of the moon, astronauts noticed that they could jump much higher than back home on Earth. What can you conclude from this discovery?
1. The Moon is at a very great distance from Earth.
2. Earth’s gravity is not felt very strongly on the Moon.
3. The gravitational force of Earth is less than the gravitational force of the Moon.
4. The gravitational force of Earth is greater than the gravitational force of the Moon.
5. The Moon has no atmosphere.
21. In a series circuit, there is only one path for the electric current. When the circuit is broken, the current stops flowing. In a parallel circuit, the current flows in two or more separate paths. If the current in one path is interrupted it still flows in the other branches.

Look at the diagrams. Assume that the light bulbs labeled A and C have burned out.
Which of the following will occur as a result?
1. The wire between A and B needs to be replaced
2. Bulb B also will not light
3. Bulb D also will not light
4. The parallel circuit needs to be rewired
5. Both circuits need a new battery
22.At any given moment, your senses are bombarded by many stimuli.Selective attention is the process by which the brain chooses the stimuli selective attention?
In which situation would you be most likely to employ selective attention?
1. while watching an exciting movie in a movie theater
2. when feeling sunlight strike your skin on a hot, humid summer day
3. when smelling the aroma of a simmering stew when you enter a restaurant
4. while tasting the sweetness of a sugary soft drink
5. while listening to one person’s voice at a crowded party
23. Air Pollutants From Smokestacks

What cause the air pollutants emitted by smokestacks to become wet deposits?
1. incomplete industrial processes
2. malfunctioning antipollution devices
3. the use of petroleum-based fuels
4. action of ocean water
5. water vapor in the air
24.Tides are the alternate rise and fall of the waters of the oceans, High tide occurs twice a day. Tide are causes primarily by the moon’s gravitational pull on Earth. The sun also contributes to the tides, with its gravitational pull.
When would high tide be the highest?
1. when the sun and moon are positioned in a straight line with Earth
2. when the sum and moon are positioned at right angles to each other
3. when there is a waxing crescent moon
4. when there is a waning crescent moon
5. when the sun has sunspots
25.Every moving object has kinetic energy, which is determined by both the object’s mass and its speed. A moving object can transfer kinetic energy to a stationary object, which then moves.
Which of the following is implied by this information?
1. The more mass and speed an object has, the less kinetic energy it has.
2. The kinetic energy of a moving object cannot be measured.
3. A moving object does not have kinetic energy.
4. A stationary object does not have kinetic energy.
5. A stationary object has more kinetic energy than a moving object.

GED SCIENCE TEST

Quiz