[FREE] Middle School Science Test With Answers
Advertisement Who is the scientist credited with creating the theory of relativity? Isaac Newton Louis Pasteur Johann Kepler Albert Einstein's theory of relativity is arguably the most widely known scientific theory in the world alongside Darwin's...
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What's the name of the one we live in? It's what is known as a barred spiral galaxy and could be up to , light-years across. It's estimated that the Milky Way is about Which is faster, the speed of light or the speed of sound? Light Neither It varies. The speed of light is , miles per second while the speed of sound is only miles per hour. Technically it does vary; the speed of light is measured in a vacuum, and the speed of sound is measured in air at a temperature of 20C. Any variation to those constants will alter the speeds, but those are the generally accepted scientific values. Just how fast is light? The closer an object gets to the speed of light, the slower time becomes, and it's theorized that is you tried to exceed the speed of light, you could go back in time.
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That's just a theory, of course. Advertisement What do you call it when a gas changes to a liquid state? Sublimation Vaporization Condensation Condensation is what happens when a gas changes state, or condenses, into a liquid, hence the name. Crystallization can occur after that and transform a liquid into a solid. A solid could also sublimate into a gas or melt into a liquid. Doppler radar is used in meteorology to measure cloud movements and precipitation and even in baseball with their Statcast System. Echo Reverb Acoustics Sound can work a lot like any solid object when it hits a wall and the waves bounce back toward where they came from.
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Smooth, hard surfaces are best for reflecting sound, while soft surfaces and objects will absorb the waves rather than reflect them. At what temperature does water freeze? That's for pure water at normal pressure, and of course, that value can change with various variables introduced. For instance, supersaturated saltwater will free at How much of the Earth's surface is water? The amount of freshwater is obviously small by comparison, and of that small amount, very little of it is actually on the surface. Most water is trapped underground and hard to access.
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Those gifted in mathematical manipulations or in language arts compositions may find themselves more or less stymied by the vast array of formulas, facts, and laboratory practices that have come to define our concept of scientific education. Though most elementary school students gain a brief introduction to scientific study, such as animal classifications and the scientific method, it is not until middle school and high school that most curricula extend into the major science disciplines.
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Even after gaining a glimpse of the core sciences—biology, chemistry, and physics—in high school, the standard curriculum has barely touched the surface of scientific study and knowledge. Despite the breadth of scientific subjects and specialties, all science education shares a common denominator: fostering the skills necessary to think critically and to analyze the world around us. Though students may be able to manage a passing grade in basic biology or physics on memorization alone, it becomes increasingly evident at higher levels of education that science requires students to develop a new academic mindset and to approach problems in a way different from those presented in any other academic discipline. Pursuing an education in the sciences allows students to value both the creativity and inherent curiosity of experimentation and discovery, while also embracing the strict principles that govern the physical and biological worlds.
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The result is a kind of poetic harmony between hard fact and manipulable theory. While certain science concepts are essentially set in stone, others are not as well defined. Balancing our current knowledge against the possibilities of expanding and developing that knowledge is what gives scientists such a unique mindset. While this approach allows for infinite possibilities and growth, it is a far cry from the way that other academic subjects are taught.
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As such, students frequently struggle to grasp the intricacies of scientific principles and applications. The tardiness with which most students first encounter this critical mindset only adds to the challenge of incorporating it into their studies; by the time high school students begin to apply scientific thought processes, they have already largely developed their study habits and academic approaches. In a discipline with subjects ranging in scope from the molecular and atomic level to the universe itself, and with subject matter including the formulas that govern gravity as well as the biochemical reactions that allow us to process thought, it is unsurprising that students may feel out of their depth when learning new science topics.
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In order to better approach these complex subjects, it is essential that students take the time to practice applying their new scientific knowledge and developing their mental acuity. Varsity Tutors offers a wide array of practice tests for different science topics and subjects, designed to help students of all ages. Whether you are tackling your first life science course in high school biology, or if you are a pre-med undergrad grappling with the intricacies of organic chemistry, our practice tests may be able to help you make sense of the topics that trouble you most. Our science practice tests offer content organized by topic or with randomized questions in order to help you control how you study. Each question even offers a comprehensive explanation to help you master the concept tested.
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When you register for a free account on the Learning Tools website, you will be able to save your scores and share your results with study partners, tutors, and teachers, allowing you to track your progress with ease. As on the results pages for the concept-specific practice tests, the results pages for the longer practice tests give you a variety of useful metrics, links to in-depth review, and detailed explanations that walk you through each answer. These online science practice tests can also help you create a personalized review plan focused on the concepts you know you need to review.
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Take some time to explore our site and familiarize yourself with the science practice tests available. You may be surprised by the progress you could make with our materials!
Quiz: Can You Pass This Basic Middle School Science Quiz?: HowStuffWorks
Would a green salad be using thermal energy? Energy This Science quiz is called 'Energy' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to You can subscribe on the page at Join Us What is energy? Energy, in short, is simply the ability by which people and things can work. The study of energy is performed by physicists. There are a number of different types of energy that include potential energy or stored energy , kinetic energy the motion of objects , thermal energy caused when there is a sharp change in temperature , chemical energy caused when a substance is transformed through a chemical reaction , nuclear energy is energy associated with an atomic reaction , mechanical energy is the sum of potential energy and kinetic energy and electrical or electromagnetic energy changes that are caused by the flow of charged ions or electrons through a current.
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The energy in matter can cause the matter to change. For example, if you the mass stand still at the street corner waiting for the traffic light to turn red, you have potential energy. The potential energy is the ability to move forward across the street but by standing still, that potential energy is being stored. Law of Conservation of Energy: According to the Law of Conservation of Energy, energy is neither created nor destroyed. Rather, energy can only be converted from one form of energy to another form of energy.
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Looking at the following list of objects, which would be using thermal energy? Melting butter Chocolate chip cookies Green salad As thermal energy is a change in matter brought about by a sharp increase or decrease in temperature, melting butter would signify that there was a sharp increase in temperature causing the butter to melt. Answer a is correct 2. Answer a is correct 3. If you are sitting down at a table, not moving, what kind of energy exists?
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Stored energy Kinetic energy Electrical energy When an object or mass stays stationary, it contains energy but it is not currently being used. Therefore, the energy is being stored. Answer a is correct 4. Looking at the following list of objects, which would be using chemical energy? Pogo stick Baseball bat Ice cream When a substance is transformed through a chemical reaction it is related to chemical energy. In this example, a thermometer that has mercury in it remains stationary until heated. The heat then causes the mercury in the thermometer to change, causing it to rise to give a reading. Answer b is correct 5.
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Although heat and temperature are not the same things, they are closely related. In fact, a good definition for the word heat is— Energy that can be transferred from one object to another because of a difference in temperature how hot or cold something is. Conduction Sometimes the transferring of thermal energy happens when two objects come in close contact. This type of shift is known as conduction and happens by the collision of molecules as the heat flows from the warmer object to the cooler object. It is important to understand that warmer molecules move a lot faster than cooler ones. The transfer only stops when the temperatures of both are equal.
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Conduction: Real World Examples The hood of a car becomes warm once the engine is turned on. A cool ceramic mug will become hot once coffee is poured into it. Heat from your hand can melt a solid ice cube if you hold it. Not all objects are good conductors. Solids are better at transferring heat through conduction than liquids. Liquids are better conductors than gasses.
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Metals are better than plastics, and the list goes on and on. Still, conduction is a common way that heat is transferred through objects. Convection Convection is the second type of thermal energy transfer. It also requires contact for the transfer to occur. Just as conduction is more common with solids, convection is the more likely way of energy trade happening with liquids and gasses. Using a circular pattern of heating, warmer areas of liquids and gasses going through the convection process rise up to cooler spots. This dance continues until the convection process is complete. Convection: Real World Examples When water boils, heat moves from the eye of the stove to the pot and then to the water at the bottom of the pot. This water moves up and begins to circulate. A heater inside of a hot air balloon heats the air and so the air moves upward, causing the balloon to rise, as well.
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Steam billows from the top of a hot cup of tea; the hot energy rises up into the cooler air. Radiation The third form of thermal energy transfer differs from the first two ways of transferring heat in that contact between the two sources is not needed. As these waves come in contact with particles, they cause them to move.
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As the molecules speed up, they also heat up. Radiation: Real World Examples Light from the sun hits your skin and causes you to feel warm. Microwaves from a microwave oven come in contact with food and heat it. These questions test your knowledge of the surface of the earth, geological processes, as well as the atmosphere and its conditions. Just like chemistry and physics, geology has basic laws or rules that help us understand the way the earth works. To understand this law better, take a look at the picture above.
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The layers of the sedimentary rock pictured here may look alike, but they are not the same age. This is because of the way that sedimentary rocks are made. Sedimentary rocks are formed when weathering ice, wind, etc. As this goes on for thousands, even millions of years, new rock is formed. The Law of Superposition states the obvious: the younger rock will be on top and the oldest layer on the bottom. But did you know that the Sunshine State is also a limestone plateau formed out of the sea millions of years ago? What you see of the state of Florida now is just a small part of what is called the Florida Plateau or the Florida Platform. In fact, two-thirds of the platform is buried beneath the Atlantic Ocean and the Gulf of Mexico. For millions of years, the entire state was submerged.
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But over time, the land began to take shape thanks to all of the small creatures that lived and died in the sea where Florida now sits. As thousands and then millions of years passed, the stacked remains of these animals were fossilized and classified by the warm sea water. The result? Limestone rock and the raised area of land that we call home. In central Florida, this limestone is called the Ocala Group. Sitting on top is a layer of clay known as the Hawthorne Formation. The sand and clay found at this level were deposited millions of years ago as the Appalachian Mountain belt weathered and eroded. Parts of this formation have karst features—including caves, sinkholes, and shallow basins that sometimes fill with water forming lakes or ponds.
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Another important geographic feature that is unique to Florida: the Ocala Uplift. This area stretches down central Florida, running parallel with I The lower part of the state has a rich geological history, as well as the Florida Keys which were formed during the last ice age over , years ago. During this time, the sea level dropped and the exposed fossils became what is now a chain of limestone islands. Two dominate rock formations, the Key Largo Limestone and the Miami Oolite, were formed during this time, as well. These questions test your knowledge of outer space and the components contained in our solar system. It also tests on space explorations and technological advancements. Here are some space-related concepts you need to know. Stars Interesting celestial bodies, stars are huge spheres of gas that are held together by one force: their own gravity.
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Our own galaxy, the Milky Way, contains billions of these plasma gas giants and many other galaxies contain them, as well. The sun, a G2 yellow dwarf star, is the closest to earth. Astronomers classify stars into seven classes based on their properties, especially mass and temperature. Color- The color of a star is based on its surface temperature. Chemical composition- What the star is made of. Distance- How far away a star is from a particular point. Luminosity- The total amount of energy emitted per unit of time. Size radius - How big the star measures. Stars are born out of gas and dust. This mixture, known as nebulae, is the basis of the internal nuclear reactions that cause stars to burn brightly for very long periods of time. Like animals and plants, stars have life cycles which we refer to as an evolutionary pattern.
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Generally, the larger a star is, the shorter its life cycle will be. This is because the bigger a star is, the more quickly it will use its fuel hydrogen. These questions test your knowledge of living organisms and their major structures and functions. It also covers DNA and genetics as related to biology. Check out these important concepts. Prokaryotes versus Eukaryotes The first step to understanding biology and other branches of life science is having a general idea of what living organisms are made of. Anything living, from microscopic bacteria to the biggest animal to have ever walked the earth, is made of the same thing: one or more cells. Cells, the basic units of all life form, contain genetic material DNA that makes us who we are. Cells come in many different shapes and sizes, but there are two main types: prokaryotic and eukaryotic.
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Two Categories: An organism will fall into one of two categories depending on what kind of cells it contains. The first, prokaryotes, have been around for 3. These organisms have very simplistic cells. Prokaryotic cells have some of the parts that more advanced cells have i. Because they have no nucleus, the DNA of prokaryotic cells is left floating around. Just one cup full of dirt contains thousands of different species of bacteria, examples of prokaryotic-celled organisms.
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Prokaryotic-celled organisms are never multicellular, and the DNA in them is haploid, single, not paired. The second grouping, eukaryotes, include plants, animals, and fungi. Eukaryotes can be unicellular, but most of the time, they have more than one cell. Eukaryotic cells are equipped with organelles surrounded by membranes that prokaryotes are missing.
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This includes a nucleus surrounded by a cell membrane. Eukaryotes not only differ in their cell makeup but also in the way that they reproduce. Prokaryotes reproduce through binary fusion. Mitosis and Meiosis take place with eukaryotes. One final difference between the two is size; eukaryotes tend to be much larger. Photosynthesis Plants are similar to animals in many ways. After all, they are both living organisms, multi-celled eukaryotes, and require energy to live. But plants and animals differ in one major way: where they get their energy from. To live, plants need just three basic things: sunlight, water, and carbon dioxide. This is because plants make their own food through a process known as photosynthesis. This makes them autotrophs. See below for the process used by plants to make their food: Photosynthesis is the way that plants capture sunlight and use it to convert carbon dioxide and water into a chemical energy source.
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