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Isaiah

Questions (290)

How many different elements are present in the chemical formula above?1 2 3 4
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Which of the following correctly lists the elements in the chemical formula above?Carbon, hydrogen, cobalt, oxygen Carbon,
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Which of the following chemical formulas contains the most molecules?5CO 3H2O 2Fe2O3 4C3H8
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Which of the following chemical formulas contains the least total atoms?CO H2O Fe2O3 C3H8
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Which of the following chemical formulas contains the most total atoms?CO NaCl NaHCO3 H2O
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Which of the answers below would not be a chemical symbol of an element?Mg Zn fe Co
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How many atoms of sodium does this formula indicate you have: NaCl0 1 2 3
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How many atoms of hydrogen does this formula indicate you have: 5H2O 1 2 7 10
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Which of the following provides the number of molecules of an element or compound?Coefficient Chemical symbol
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Which of the following provides the number of atoms of an element?Coefficient Chemical symbol Subscript Capitals
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Solar energy from the Sun's rays is absorbed by the Earth's land and water surfaces. This absorbed energy is then radiated back
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Water vapor traps heat in the Earth's atmosphere. This serves to maintain Earth's atmospheric temperature. Based on this
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Many different processes, both natural and human-caused, can release carbon dioxide into the atmosphere. Which of the following
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Each of the following gases is present in the Earth's atmosphere. Which of them contributes to the greenhouse effect?oxygen
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Why are many scientists concerned about humans adding large amounts of carbon to the atmosphere by burning fossil fuels
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Which of the choices below is one of the primary gases found in the atmosphere?A. carbon dioxide B. argon C. nitrogen D. helium
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Which of the following statements about forest fires and the atmosphere is true?Forest fires add oxygen to the atmosphere.
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Which statement best describes how excessive carbon dioxide and other greenhouse gases in the atmosphere alter the system
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The envelope of gases surrounding Earth is known as the atmosphere. Which of the following statements accurately describes the
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Which of the following statements about the information in the graph is most likely to be true?A. Human activities contributed
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Greenhouse gases are gases that trap heat within the Earth's atmosphere. What would be the most likely result of an increase in
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Which of these is always present in the atmosphere?A. water vapor B. hail C. snow D. sleet
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Which of the following natural processes involve the use and renewal of atmospheric gases?A. decaying of organic matter B.
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These cylinders contain layers of ice, with each layer corresponding to one warming and cooling period, or one year. With these
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The Earth's atmosphere contains certain chemicals that absorb infrared energy emitted by the Sun and Earth. The process by which
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Organs orOrgan Systems cell wall
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cell wall
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controls which substancesenter or exit a cell
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the control center of a cell; sendsinstructions to other cell parts
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provides strength andsupport for plant cells
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allows plant cells to trap lightenergy in order to make food is?
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Prokaryotes are organisms that do not have defined nuclei in their cells. Eukaryotes are organisms that have cells with
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Based on the positions of sodium (Na) and potassium (K) in the table, Tracy can predict that sodiumA. is more abundant than
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Which part of an atom has a negative charge?A. nucleus B. neutron C. electron D. proton
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How many total daughter cells are produced when one cell undergoes meiosis?A. It depends on the organism. B. 8 C. 4 D. 2
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Egg and sperm cells contain half the number of chromosomes as body cells.Egg and sperm cells are known as _______ cells. A.
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Which of the following best describes the difference between a mixture and a pure substance?A. A mixture has the same properties
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The diagram shows heat being removed from the substance, causingA. it to form a liquid as its particles move farther apart. B.
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Iron reacts with sulfur to form iron sulfide. If 60 grams of iron reacts with sulfur to produce 90 grams of iron sulfide, how
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A copper wire is made of copper (Cu) atoms. Which of the following best describes the copper atoms?A. They would be mostly the
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In the chemical reaction below, sodium (Na) and chlorine (Cl) combine to form sodium chloride (NaCl).2Na + Cl2 → 2NaCl The
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A scientist created diagram X to represent the molecules of a kind of gas in a closed container. Diagram Y represents the
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A sample of a gaseous substance changes into liquid.
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If an atom has 18 protons, 16 neutrons, and 22 electrons, what is the atom's electrical charge?A. +6 B. -4 C. -2 D. +4
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Which of these best explains why the daughter cells produced by binary fission are identical?A. Binary fission involves a single
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Which of the following are examples of sexual reproduction?A pollen grain from one flower fertilizes another flower, resulting
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Liz is examining a plant cell under a microscope. She sees many small green strutures inside the cell. Her teacher explains that
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The atomic symbols of nitrogen and oxygen are N and O, respectively. The chemical formula of a particular substance is NO2.
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How do the physical and chemical properties of calcium iodide (CaI2) compare to carbon disulfide (CS2) and sodium fluoride
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The egg cells of a dog have 39 chromosomes each. How many chromosomes does each of the dog's body cells have?A. 156 B. 39 C. 78
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Michelle wants to classify an organism that she is studying in lab. The organism is multicellular, makes its own food, and is
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Helium (He), neon (Ne) and argon (Ar) are all colorless, odorless gases with low chemical reactivity. Based on the periodic
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A water molecule is made of hydrogen and oxygen atoms and has the formula H2O. How would a mixture of hydrogen and oxygen differ
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Which of the following statements is true about the lithium and the helium atoms?A. There is no difference between helium and
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When a highly reactive metal, such as magnesium (Mg), is mixed with a reactive nonmetal such as sulfur (S), the two elements
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Who introduced the Chinese writing system to the Japanese?A. Korean scribes B. Japanese princes C. Buddhist monks D. Chinese
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Confucian ideas were adopted by the Japanese during Prince Shotoku's reign. Which of the following institutions was most heavily
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Shinto is an ancient Japanese religion that started around 500 BCE or earlier. Which of these is true about the Shinto religion?
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How is Shinto different from other major religions such as Christianity, Islam, and Judaism?A. Shinto does not perform religious
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Based on the information in the table, what can be concluded about feudalism in Japan and Europe?A. The systems in both places
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In what way is the Shinto religion different from Japanese Buddhism?A. Shinto followers worship several gods. B. Shinto
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Keiji is a follower of the Shinto religion. Which of these would most likely be part of his religious practice?A. studying the
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Lady Murasaki Shikibu wrote a novel called The Tale of Genji, which depicted court life during the Heian Period. The story tells
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Keiji is a follower of the Shinto religion. Which of these would most likely be part of his religious practice?A. praying with
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Who introduced the Chinese writing system to the Japanese?A. Japanese princes B. Korean scribes C. Buddhist monks D. Chinese
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During Prince Shotoku's reign, many aspects of Chinese culture were brought to Japan. At a time long before modern-day
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The Heian period, which lasted from the late 8th century to the 12th century, was one of early Japan’s longest periods of
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The Japanese daimyo was similar toA. the Chinese emperor. B. the European vassal. C. the European lord. D. the European peasant.
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The feudal period of Japan lasted from the 12th century through the 19th century. During this time, Japan was ruled by the
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Almonds are edible seeds that grow on trees. Wild almonds typically have a bitter taste caused by a chemical in the almond. If
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White-tailed deer are mammals. Mammals have a reproductive strategy that is not found in all animals. Which two statements
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When an athlete began running, both her breathing and heart rates increased. The athlete’s breathing and heart rates
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Students were looking at coins during lunch. One of them noticed that older pennies looked and felt different from new pennies.
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A person riding a bicycle wants to move the bicycle forward. She moves her legs up and down on the bicycle’s pedals. Then the
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The student learns that carbon dioxide is stored in Earth’s mantle. Which part of the carbon cycle diagram shows the carbon
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Coal is mostly carbon. When coal is burned, it reacts with oxygen. The carbon dioxide produced is released into the atmosphere.
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In a type of bean plant, the trait for yellow pods (B) is dominant to the trait for green pods (b). A plant that is heterozygous
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Some processes add carbon dioxide to the atmosphere. There are other processes that absorb carbon dioxide from the atmosphere.
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There are advantages to both sexual and asexual reproduction. Which of these describes the most likely advantage of sexual
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A student has been learning about atoms. He wrote a small paragraph describing one. How an Atom Looks An atom
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The tribes that would later become the Mongol people were originallyA. farmers in Eastern and Southern Asia. B. rice farmers in
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The Mongols invaded Korea, known as Goryeo at the time, on several occasions between the years of 1231 and 1270. Which statement
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The Mongol's rule of China was different from other dynasties in China because the Mongol dynastyA. was the first foreign group
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use of fertilizercrop rotation use of seedlings improved irrigation new types of plows The above list describes agricultural
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Which of the following was a result of the peace in Asia in the thirteenth and fourteenth centuries under Mongol rule?A. Islam's
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The Roman Empire fell around the fifth century, and as Islam spread in the seventh century, trade between Europe and China
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known to perfect certain forms of Chinese art, such as porcelainofficial state philosophy was neo-Confucianism experienced high
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The Ming Dynasty had many strong leaders. These leaders felt the need to show their power by leaving lasting examples of the
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Which of the following is an effect of the revival of Confucianism during the Song Dynasty?A. the development of a powerful
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What impact did Mongol leaders Genghis Khan and Kublai Khan have on Europe?A. The khans and their armies taught Europeans modern
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Emperor Wen established the Sui Dynasty.The Period of Disunion was ended. Emperor Wen reunified all of China under his
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Who was responsible for overthrowing the emperor of the Yuan Dynasty in 1368?A. Liu Che B. Yang Jian C. Genghis Khan D. Zhu
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Which of the following regions of India became a state ruled by the Mongols?A. Delhi B. Punjab C. Baluchistan D. Kashmir
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If you saw a meteor shower, what layer of the atmosphere did the meteors burn up in?Exosphere Stratosphere Thermosphere
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What is the main benefit of the ozone layer?Creates beautiful auroras Trapping harmful radiation Provides a place for satellites
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What is the main factor that distinguishes one layer of the atmosphere from the next?A rise or fall in temperature The person
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Would air with water vapor be heavier or lighter than normal air without water vapor?lighter heavier
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Why does the mountain climber need an oxygen mask when climbing Mount Everest?The mountain climber is at a high altitude where
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As you go higher and higher into the atmosphere, you will have ________ pressure.more less
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What is the cause of atmospheric pressure?high temperatures low temperatures gravity ozone depletion
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