STUDENT NAME DATE PERIOD. Science Grade 7. Read each question and choose the best answer. Be sure to mark all of your answers.

Transcription

1 FORMATIVE MINI ASSESSMENTS First Grading Period September -5 STUDENT NAME DATE PERIOD Science Grade 7 Read each question and choose the best answer. Be sure to mark all of your answers. 1 Safety goggles and an apron must be worn when handling chemicals because chemicals A may stain clothes B often react with the skin are difficult to pour D produce smelly fumes 4 Which drawing below represents an element? K l F G O A sweater purchased at a shop in Marker Square is advertised as being made of 60% wool fibers and 40% cotton fibers woven together. ow would a scientist classify the sweater? F Element G ompound Mixture J O J Solution 3 A scientist combines oxygen and hydrogen to form water. This combination shows that water is A a compound B an element a mixture D an atom 5 Which of the following is an everyday example of chemical change? A The melting of butter left out in the kitchen B The complete burning of charcoal The dissolving of sugar in a glass of tea D The condensation of water vapor to form rain SAISD 07 Science FMA September 09 Page 1

2 6 A student was asked to measure out 50 ml of water as accurately as possible. Which piece of equipment should the student select to accomplish this task? F Five 50 ml beakers G A 100 ml graduated cylinder A 50 ml flask J A 500 ml measuring cup 7 Which of the following statements is an example of an observed chemical phenomenon? A Sugar crystals, when placed in water, will dissolve completely. B A glass rod when heated will become soft, bend, and then melt. A small piece of gold foil floats when placed in alcohol. D An antacid tablet, when placed in water, begins to bubble and fizz. clipart.com 10 During a pizza party after school, many students picked off the olives that were on their slices of pizza. Which of the following could the pizza be used to model? F Mixture G ompound Element J Atoms 8 Which of the following is an example of a chemical change taking place? F Diamonds are used to cut glass. G Sugar can be dissolved in water. Aluminum foil floats in water but aluminum screws sink. J Yeast acts on sugar to form carbon dioxide and alcohol. 9 Why should you not wear dangling chains and bracelets or baggy clothing while performing lab activities? A The baggy clothing will absorb liquids. B Dangling jewelry could get caught on equipment. Lab coats and aprons will not cover up baggie clothing. D The metal in jewelry might become overheated and cause burns. 11 A student received a silver ring for her birthday. The ring was dropped and became bent, so the girl had to reshape it. Later in the day she wore the ring while swimming in the ocean and the ring began to tarnish and turn black. While sunbathing, the ring became hot. A chemical phenomena that the ring demonstrates is that it A will tarnish and turn black B can be bent and reshaped has a shine D conducts heat SAISD 07 Science FMA September 09 Page

3 Liquid Mass of Liquid (g) Density of Liquids Volume of Liquid (cm 3 ) Density of Liquid (g/cm 3 ) Tap Water Salt water Oil Which of the following hypotheses is supported by the data in the table? F Liquids with the same volume have the same mass. G Oil is less dense than tap water or salt water. Salt is a solid while water and oil are liquids. J Liquid substances are less dense than solid objects. Student Data hart Plot 1 Plot Plot 3 Plot 4 Plot size 1. m 1. m 1. m 1. m Amount of magnesium added to the soil Number of cucumbers that grew Average mass of each cucumber (g) 1.0 g 10.0 g g g A science student wanted to investigate growing cucumbers. e marked out four plots of soil and gave each area a different amount of magnesium. Then he planted cucumbers. What question was this experiment probably designed to test? A Does adding chemicals to the soil damage cucumber plants? B ow does magnesium affect the growth of cucumbers? Does the size of a plot determine the number of cucumber that grown? D What chemicals do cucumbers need to grow the best? SAISD 07 Science FMA September 09 Page 3

4 Matter Element Mixture ompound 14 Which word should be placed in the box as an example of a compound? F Aluminum G Oxygen Water J Mud 15 When viewed using a magnifying glass, sugar crystals can be seen to have a cubic shape. Which model shown below would be best to use to represent the way the atoms are arranged in sugar crystals? A B D SAISD 07 Science FMA September 09 Page 4

5 Periodic Table of the Elements Group ydrogen 3 4 Li Be Lithium Beryllium 11 1 Na Mg Sodium Magnesium 19 0 K a 3 Sc 4 Ti 5 V Potassium alcium Scandium Titanium Vanadium hromium Manganese Iron obalt r 7 Mn Rb Sr Y Zr Nb Mo Tc Ru (98) Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium s Ba La f Ta W Re Os esium Barium Lanthanum afnium Tantalum Tungsten Rhenium Osmium Iridium Fr Ra Ac Rf Db Sg Bh s Mt (3) (61) (6) (63) (6) (65) (66) Francium Radium Actinium Rutherfordium Dubnium Seaborgium Bohrium assium Meitnerium 8 Fe 9 o Rh I r Lanthanide Series Actinide Series 58 e Th Pr Pa Nd U Pm Np Sm (145) erium Praseodymium Neodymium Promethium Samarium Pu (44) Thorium Protactinium Uranium Neptunium Plutonium Atomic number Ni Pd Pt Symbol Atomic mass 9 u Ag Au 1 30 Zn d g 14 Si Silicon Ga In Sn Sb Te I Tl Ge Pb Name As Bi Se Po Br At 18 e elium B N O F Ne Boron arbon Nitrogen Oxygen Fluorine Neon Al Si P S l Ar Aluminum Silicon Phosphorus Sulfur hlorine Argon Nickel opper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Palladium Silver admium Indium Tin Antimony Tellurium Iodine Xenon (09) (10) () Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon 110 Mass numbers in parentheses are those of the most stable or most common isotope. (69) Kr Xe Rn 63 Eu Am 64 Gd m 65 Tb Bk 66 Dy f 67 o Europium Gadolinium Terbium Dysprosium olmium Erbium Thulium Ytterbium Lutetium Es (43) (47) (47) (51) (5) (57) (58) (59) (6) Americium urium Berkelium alifornium Einsteinium Fermium Mendelevium Nobelium Lawrencium 68 Er 100 Fm 69 Tm 101 Md 70 Yb 10 No 71 Lu 103 Lr