YOU WERE LOOKING FOR: Physical Science Pretest Answers
Similarly, the amount of gas and solid can change choices c and d. The amount of disorder in the universe is always increasing, so it does not have to stay constant through a reaction choice e. Which of the following is NOT true about sunlight? It...
Animals that have chemical defenses contain chemicals noxious to predators. Which of these is NOT an example of camouflage or chemical defense? A walking stick insect looks just like a twig. A skunk has an awful smell. Feathers of the pitohui bird...
Genes are particles found in the nucleus of DNA atom. View Correct Answer Answer: A Every human normally inherits 23 chromosomes from the mother and 23 chromosomes from the father. Fraternal twins happen to be in the womb at the same time, but genetically, they are not any more similar than two siblings who are not twins choice c. Fraternal twins come from two different eggs fertilized by two different sperm cells. Exposure to X-rays can alter chromosomes choice d. Genes are not particles. Genes are found in the nucleus of a cell and are made of DNA. Identical twins have exactly the same genes.
Identical twins result when A. View Correct Answer Answer: A In order for twins to have the same genes, they need to come from one egg and one sperm cell. In peas, the gene for green color is dominant over the gene for yellow color. We will specify the gene for yellow peas as y, and the gene for green peas as Y. Each pea has two genes for color one from each parent and donates only one gene for color to its offspring. Yellow peas have the genotype yy. Any other genotype leads to green peas. Consider the following Punnett square: The offspring of these two parents A. Which of the following is NOT true? All organisms are made of atoms. All organisms are made of molecules. All organisms are made of one or more cells. All organisms have genetic material. All organisms have a cell wall. Other statements are true. In humans, a pair of chromosomes one from each parent determines the sex of the baby. Females have two X chromosomes, while males have an X and a Y chromosome.
The baby always gets an X chromosome from the mother, so in humans, the father determines the sex of the baby by supplying it with either an X chromosome to make it female, or a Y chromosome to make it male. In birds, like in humans, a pair of chromosomes determines the sex. Birds with two W chromosomes are male. Birds with a W chromosome and a Z chromosome are female. Which statement is true about birds? The male bird determines the sex of the offspring by supplying it with the W or the Z chromosome.
The male bird determines the sex of the offspring by supplying it with one of its W chromosomes. The male bird determines the sex of the offspring by supplying it with the X or the Y chromosome. The female bird determines the sex of the offspring by supplying it with the X or the Y chromosome. The female bird determines the sex of the offspring by supplying it with the W or the Z chromosome.
View Correct Answer Answer: E In humans, the sperm determines the sex of the child because the male has two different chromosomes. In birds, the female has two different chromosomes, so she determines the sex of the offspring. Birds have Ws and Zs, not Xs and Ys like humans, so choice d is incorrect. A species may live in association with another species. Such an arrangement is called symbiosis. Symbiosis in which both species benefit is called mutualism. If the symbiosis is beneficial to one species and neither beneficial nor harmful to the other, it is called commensalism. If one species benefits at the expense of the other, the relationship is called parasitism. A tick that attaches to the skin of a human or animal and feeds on its blood is an example of A.
Physical Science Core Physical Science offers a focused curriculum designed around the understanding of foundational physical science concepts, including the nature of matter, energy, and forces, as well as the application of scientific and engineering practices. Course topics include energy, forces, electromagnetism, waves, matter, chemical reactions, and nuclear reactions. Teacher-scored labs encourage students to apply the scientific method. Students discover new concepts through guided instruction and confirm their understanding in an interactive, feedback-rich environment. Scientific inquiry skills are embedded in the direct instruction, wherein students learn to ask scientific questions, form and test hypotheses, and use logic and evidence to draw conclusions about the concepts.
A variety of activities encourage students to think scientifically. Lab and Project activities reinforce critical thinking, writing, and communication skills and help students develop a deeper understanding of the nature of science and engineering. Virtual Lab activities allow students to engage in investigations that require long periods of observation at remote locations and to explore simulations that scientists use to test predictions. In Discussions, students compare their lab results and exchange ideas about their investigations. Practice and Explore activities provide additional opportunities for students to apply learned concepts and practice their writing and scientific reasoning skills.
It covers not only regular Physics, but also an array of other related subjects, such as Astronomy. Print or eBook. Guaranteed to raise your score. Get started today! As such, being a teacher of Physical Science requires you to be well-versed in a wide variety of topics, all so you can give your students the best and most thorough understanding of the subject as possible. It will measure your preparedness to enter the classroom as a professional by evaluating your topical knowledge as related to your field, as well as your comprehension of teaching practices as a whole. This study tool is not only percent free, but designed with accuracy in mind. It deals with all subareas as relating to Physical Science. Good luck! All trademarks are property of their respective owners.
The endocrine system is the collection of glands that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep and mood, among other things. A Vector components of an elephant are more complex than those of a penny. B An elephant is not a projectile, while a penny is. C They both have an acceleration of 9. D The elephant is greater in mass but is slowed less by the effects of air resistance. Question 17 Explanation: The correct answer is C. More massive objects will only free-fall faster than smaller objects if there is a significant amount of air resistance present.
For a penny and an elephant that are free-falling in a vacuum, the rate of acceleration would be the same, so both would fall at the acceleration due to gravity which is 9. Question 18 Which train described below would have the greatest momentum? A A kg train car moving at mph B An kg train car moving at mph C A kg train car moving at mph D A kg train car mobbing at mph Question 18 Explanation: The correct answer is A. The momentum of an object is equal to the mass of the object times the velocity of the object.
Question 19 A scientist found that when an invasive species was introduced into a river, the population of salmon native to the region decreased. The type of correlation between these two populations could best be described as A.
Question 7 Multiple Choice Worth 1 points [ The observer can conclude that the sound is moving away and the frequency of the sound wave is increasing. Question 8 Multiple Choice Worth 1 points [ Light can travel in a vacuum, and it travels faster if the light source is moving. Light can travel in a vacuum, and its speed is constant if the source is moving or stationary. Light can travel in a vacuum and will travel faster if the light source is moving. Light can travel in a vacuum, and it travels more slowly if the light source is stationary. Question 9 Multiple Choice Worth 1 points [ Light waves can travel in a vacuum and travel at a constant speed even if the light source is moving.
Light waves need a medium to travel, and they travel at the same speed even if the light source is moving. Light waves can travel in a vacuum and will travel faster if the light source is moving forward. Light waves need a medium to travel, and they travel faster if the light source is moving forward.
Scientific Practices, Engineering Design and Applications, and Crosscutting Concepts This section tests your knowledge of scientific investigations, engineering practices, and applying crosscutting concepts in a real-world setting. The Scientific Method The scientific method is probably the most widely taught topic in secondary science labs. Science and the way we teach is ever changing, but this process for investigating natural phenomenons remains a staple in high school science classrooms. Students use the scientific method to understand and answer questions about the natural world. Her best friend, London, is chewing a piece as well.
Gather Information. She says it is called Bubble Bubble and offers Laura a few pieces. Laura looks on her own wrapper and sees that she was chewing Apple Bubble Gum. Make a Hypothesis educated guess. When they get free time in the lab, Laura decides to test her hypothesis. She takes turns blowing bubbles with each of the gum brands and has London measure. She repeats this several times. Then, she has London to do the same. They also have their friend Charlie conduct the experiment. Analyze Your Test Results. After measuring, Laura looks at her measurements. She finds a few things. First, London blew the biggest bubbles of all, but not with Bubble Bubble brand B. All three of the students blew bubbles over two inches with Apple Bubble brand A. No one blew a bubble over two inches with Bubble Bubble. Present a Conclusion. By using the scientific method, Laura was able to put her hypothesis to rest. Maintaining Balance: Static and Dynamic Equilibrium Stability is used to describe a condition in which some aspects of a system are unchanging all forces acting on an object are balanced.
If a system is stable, any small disturbances to the system will fade away and the system will return to a state of equilibrium balance. One type of stability is called static equilibrium, also known as mechanical equilibrium. This is the simplest to understand as it occurs in objects that are at rest. Examples include a ladder lying against a house, the CO2 quantity in a bottle of unopened soda. Dynamic equilibrium represents a state of stability between continuing processes. One good example is a dam that has water constantly flowing in and out. Dynamic equilibrium is also considered by engineers when building various structures. These engineers must calculate forces that will be applied to these frameworks and make sure that they are strong enough to maintain balance against whatever force being exerted.
Physical Sciences This section tests your knowledge on the properties of matter, chemical reactions, interacting forces, wave transfers, as well as electricity and magnetism. Here are some concepts that you may see on the test. Nuclear Processes Atoms make up everything in the universe. This energy is known as nuclear energy. Nuclear processes, also known as nuclear reactions, occur when nuclear particles, or two nuclei, interact. The most common examples of a nuclear reaction are fission and fusion. When this process happens in a manner that is slow and controlled, the large amounts of energy produced can be used to generate electricity. A common example of how fission is used involves power plants. These nuclear power plants use control rods of the element uranium to heat. This creates steam from water which, in turn, powers electrical generators. Nuclear fusion can also be used to power submarines. Fusion: Joining Atoms A second nuclear process, fusion, occurs when two atoms join together, forming a larger atom.
Unlike fission, scientists have not figured out how to control fusion. However, we do know of several things that result from the joining of atoms. One of the best-known examples involves our greatest energy source of all: the Sun. Fusion actually occurs deep inside all-stars as their atoms are constantly being changed into helium gas. Through fusion, light and energy are produced in the form of a star. Types of Energy Energy is the ability to do work.
It cannot be created or destroyed but always exists in some form or another. Energy can be transferred from one form to another. There are two basic forms of energy: potential and kinetic. Potential energy is stored power. This type of energy is energy at rest. Some examples of potential energy include: Elastic Potential Energy— energy stored inside a spring or a rubber band Gravitational Potential Energy— energy built up in a car sitting on top of a tall hill Chemical Potential Energy— stored energy contained inside coal or wood Kinetic energy is energy that an object has while in motion.
Processes of Cellular Respiration The term cellular respiration is used to describe the way living things break down food molecules glucose into chemical energy. All forms of life except viruses go through this process. Glycolysis, Krebs cycle, and electron transport chain are the three steps of this type of respiration. Your brain, liver, and other organs undergo this process. Anaerobic respiration needs no oxygen for the break down to take place. Both anaerobic and aerobic respiration begin with the anaerobic breakdown of glucose by glycolysis. But instead of moving into the Krebs cycle, fermentation comes next. Unicellular organisms, like those that produce yeast, use anaerobic respiration.
Food Webs All living things need energy to survive. To get this energy, they either make or consume food. This is an interdependent system. Each living thing is a part of a food chain like the one below. Here are some specific concepts that will more than likely appear on the test. Stars By definition, stars are huge spheres of gas. Created by nuclear fusion, stars are held together by their own gravity. Our galaxy, the Milky Way, contains billions of stars. The Sun, a G2 yellow dwarf star, is the closest star to Earth. Astronomers classify stars based on their properties.
Three important properties include color, size, and luminosity. Color A star gets its color based on its surface temperature. Red dwarf stars are the coolest in our universe. Blue stars burn the hottest. It falls in the middle in regard to surface temperature. Size Just as stars come in a variety of colors, they also come in various sizes. Small neutron stars are sometimes as small as 30 km around 18 miles in diameter. Stars tend to grow in size as they grow in mass. Large gas giants can be over 1, times larger. The Sun is , kilometers , miles in diameter. That sounds huge, right? When compared to the red giant, Betelgeuse, our own star is a 1, times smaller. Most people confuse luminosity with apparent magnitude, which is how bright it appears from Earth. But scientists use the term luminosity to describe intrinsic brightness—how bright it is on the inside.
If a scientist is comparing two stars and both have the same surface temperature, which has greater luminosity? The answer— whichever has the greatest surface temperature. For example, the stars that are the brightest greatest luminosity are the closest to Earth in distance. The Water Cycle The most renewable of all resources, water is continually regenerated through the stages of the water cycle.
Water always exists in these three places: the ocean, the land, and the atmosphere. It also takes on many forms. These include lakes, rivers, and even sheets of ice. This is how it works: The Sun heats up water inside the ocean, lakes, rivers, etc. Through this process called evaporation, steam is formed. This steam is also called water vapor, and it rises into the air. Plant transpiration helps this process.
How does a networked server manage requests from multiple clients for different services? The server sends all requests through a default gateway. Each request is assigned source and destination port numbers. The server uses IP addresses to identify different services. Each request is tracked through the physical address of the client. Which protocol translates a website name such as www. HTTP delivers web pages to users. FTP manages file transfers. What is an advantage of using IPv6? Refer to the exhibit. Using the network in the exhibit, what would be the default gateway address for host A in the Choose two.
A network technician is attempting to configure an interface by entering the following command: SanJose config ip address The command is rejected by the device. What is the reason for this? The command is being entered from the wrong mode of operation. The command syntax is wrong. The subnet mask information is incorrect. The interface is shutdown and must be enabled before the switch will accept the IP address. What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server? A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
It involves math and research and reading. It will help you find out what you need to study first. Here are some quick tips on how to be prepared: Study reading first. Learn about science experiments and studies. A lot of the questions will ask you about science experiments. Learn to read and understand data, tables, charts, and graphs. There will definitely be charts, graphs, and tables on the test! Learn science symbols and words. If you understand the notation for atoms and molecules, measurements like kilometer or joule, and terms like momentum, it will help!
Practice with diagrams. A lot of science processes can be shown in diagrams. If you can understand a science diagram, that will help! A good online prep course or GED science book should help you learn what you need to know. Then, the GED science test can be easy! What kind of science is on the GED test? One way is to think about areas of science. Life science covers things like cells, plants, ecosystems, and diseases.
It includes science about any kind of living thing or how living things interact together. Physical science covers things like motion, technology, and energy. You can think of it as physics. Earth and space science includes the planets and stars, galaxies and the universe, and systems on Earth, like the water cycle. Another way to think about the test is to focus on the skills you need. Because there are so many areas of science, focusing on skills is a good strategy to study. The skills you need are: Read, create, and understand science texts, tables, charts, and graphs. Understand how science experiments and studies are designed. Compare and evaluate multiple conclusions, sets of data, or theories. Understand and use scientific theories or processes. Focusing on these skills will help you learn quickly!
How many questions are on the GED science test? Expect about 16 life science questions, 16 physical science questions, and 8 Earth and space science questions. How many questions can you get wrong on the GED science test? The science test has about 40 questions, and your score will be between and You only need to score to pass or in New Jersey.
The exact number of questions is different on different versions of the test, but you might be able to miss up to 20 questions on a 40 question test. How long is the GED science test? How can I pass my science test? You need skills in reading, math, and of course science! Focus on learning how to: Read about science and understand tables, charts, and graphs. Read about and understand science experiments and studies, including seeing flaws in how studies are designed. Use data to come to conclusions and compare data and evidence. If you can do these three things, you should do well on the GED Science test! Where can I take the GED science practice test ? You can find it at GED. Here are three recommendations of GED science books to help you pass the test! This book is straightforward, easy to understand, and has practice tests to put your skills to work. This workbook is for you if you just need a little bit of brushing up to pass the test.
It focuses on GED-style practice questions to get you ready for the test. A lot of the core skills on the science test are reading and math skills, so be sure you have science-based math and reading skills. Can I download GED science worksheets? Jump-start your studying with these sample Essential Skills science worksheets! What are the GED science short answers and extended response? When the newest GED test came out in , it included an Extended Response essay in social studies and short answer questions in science. The science test never had a full essay, called an extended response. In March , the GED social studies test was updated to remove the extended response essay. What about the science test? Some sources say that there are no short answer questions anymore… Well, that might be some confusion because the essay was removed from social studies. Most of the questions are multiple choice questions! If you focus on multiple choice questions in your studying, you should be okay.
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