GED Science Test

Velocity equals displacement/time. What is the velocity of a person who took the curviest roads possible to travel all the way west to Los Angeles (2000 miles) and it took them 72 hours to get there?

(velocity= displacement/time)

• 27.8 miles/ hour

• 55 miles/ hour

• 144000 miles/ hour

• .036 miles/ hour

Sarah backstrokes at an average speed of 8 meters per second. How long will it take her to complete a 200-meter race?

• 0.04 s
• 1600 s
• 50 s
• 25 s

Liza is swimming laps from one end of a 50 meter pool to the other. Going from one end to the other is considered one lap. If she swims four complete laps, which statement is TRUE?

• Her distance and displacement are both zero.
• Her distance is zero, but her displacement is 200 meters.
• Her distance is 200 meters, but her displacement is zero.
• Her distance and displacement are both 200 meters.

A chemist has a sample of hot gas and measures the amount of heat being released as it cools. The flat parts of the graph represent state changes. Which state(s) of matter are found at 117°C?

• solid and liquid

• liquid and gas

• liquid only

• gas only

Tags

NGSS.MS-PS1-4

Using Newton's second law, what would be the force of an orange with a mass of 150 grams and acceleration due to gravity of approximately 10 m/s²? (Remember, Newton's second law is Force = mass × acceleration)

• 1.5N

• 15N

• 150N

• 1500N

Tags

NGSS.MS-PS2-2

Frank jumps into a raft in his pool. As he jumps, he moves forward as the raft moves in the opposite direction. Which answer best describes the correct answer.

• The 1st law because a body at rest tends to stay at rest
• The 3rd law because for every action there is an equal and opposite reaction
• The 2nd law because as the mass increases so does the force
• The 4th law because I was not paying attention in class when we went over this topic.

Tags

NGSS.MS-PS2-1

You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?

• 60 N right
• 10 N left
• 60 N right
• 50 N left

Tags

NGSS.MS-PS2-2

Population Growth

In ecology, a population is defined as a group of organisms of the same species living together in a particular geographic area. Populations grow as new individuals are added. Under ideal conditions, where organisms have unlimited space and resources, populations will continually increase. The growth rate of a population under these conditions is described by the equation G=Rn where GG represents the growth rate of the population, rr represents the per capita rate of increase, and N represents the number of individuals in the population.

Escherichia coli (E.coli) is a bacterial species that is commonly grown in research laboratories. E.coli reproduce by a process called binary fission, where a single bacterial cell divides in two. The two resulting daughter cells are identical to one another and identical to the original parent cell. Under ideal conditions, E.coli will divide every 20 minutes.

But in nature, there are limitations on the growth rates of populations. A number of environmental factors limit population size, such as disease, predators, and drought, and availability of food and suitable habitat. The maximum number of individuals that an ecosystem can support is called the carrying capacity, represented by letter K. The value of K varies, depending on the species and the resources available in a particular ecosystem. The size of a population will generally stabilize once it reaches carrying capacity.

Which of the following graphs best represents a population that has reached carrying capacity?

• 
• 
• 
• 

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Chemical X has a mass of 20 grams, and chemical Y has a mass of 30 grams. If the two chemicals are mixed and a complete chemical reaction takes place, what is most likely the mass of the product?

• 20 grams

• 30 grams

• 50 grams

• 100 grams

Tags

NGSS.MS-PS1-5

Tides are the twice-daily rise and fall of water along the shores of the oceans. Tides aew caused mainly by the gravitational pull of the moon, and secondarily by the gravitational pull of the sun. The highest tides, called spring tides, occur when the sun, moon, and Earth are in line. Other high tides, called neap tides, occur when the sun and moon are at right angles with respect to the sun.

Which of the following statements is supported by the information above?

• The moon and the sun exert the greatest pull on Earth's oceans when these bodies are all in a line.

• When the moon is at right angles to the sun with respect to the the Earth, tides do not occur along the

• Spring tides occur only in the spring, and neap tides occur only in the fall.

• Neap tides are generally higher than spring tides.

Tags

NGSS.MS-ESS1-1

NGSS.MS-PS2-4