STUDENT NAME DATE PERIOD. Science Grade 8. Read each question and choose the best answer. Be sure to mark all of your answers.

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1 FORMATIVE MINI ASSESSMENTS First Grading Period October STUDENT NAME DATE PERIOD Science Grade 8 Read each question and choose the best answer. Be sure to mark all of your answers. West 60 N North 10 N 25 N South 1 A combination of forces is acting on a ring as shown in the drawing above. Which direction will movement be expected to occur due to forces being unbalanced? A North B South C East D West 60 N East 3 One of the most important scientific principals that balanced chemical equations demonstrate is A the conservation of mass B that elements are made of atoms C that some substances do not react with other substances D how subscripts are different from superscripts 2 Because heat is released, the burning of natural gas is classified as a(n) F reversible reaction G one-way reaction H exothermic reaction J endothermic reaction 4 Which statement describes a chemical reaction that is endothermic? F Dissolving a solid in a liquid caused the liquid to change color. G Dissolving a solid in a liquid caused a foul smelling odor to form. H Mixing two liquids causes the container they are in to become warm. J Mixing two liquids causes the container they are in to become cool. SAISD 08 Science FMA October 09 Page 1

2 CH 4 + O 2 CO 2 + H 2 O + heat Natural gas Oxygen Carbon dioxide Water 5 The substances involved in the burning of natural gas are given in the chemical equation shown above. Which of the following equations is correctly balanced? A 3 CH O 2 Ý 3 CO H 2 O B 2 CH 4 + O 2 Ý 2 CO 2 + H 2 O C CH O 2 Ý CO H 2 O D CH O 2 Ý CO H 2 O 7 Optical instruments such as microscopes, binoculars, and even eyeglasses function due to light rays being A reflected B refracted C diffracted D diffused 6 Both utensils shown above can be used in cooking liquids. The advantage of using the wooden instrument is that it F has the lowest density and it will float G is completely solid to prevent the liquid from passing thorough it H has a high specific heat capacity J is a heterogeneous mixture and not a metallic element SAISD 08 Science FMA October 09 Page 2

3 Family Member 4 th of July List of Foods Eaten Food Potato Baked Poisoning Salad Beans Hotdog 1 No X X X 2 Yes X X X X 3 No X X 4 Yes X X X 5 No X X 6 No X X 7 Yes X X X X 8 Yes X X X X 9 Yes X X 10 No X X Deviled Eggs 8 A family of ten held a picnic to celebrate the 4th of July holiday. After the celebration, several members became ill from food poisoning. Based on the data provided, a reasonable conclusion would be that the food poisoning was probably caused by the F potato salad G baked beans H hotdogs J deviled eggs 9 When you turn up the volume control on a CD player the music becomes louder. What characteristic of the sound waves has been changed? A Frequency B Wavelength C Amplitude D Wave speed 10 Which measuring device should a student use to directly measure the force of gravity acting on an object being lifted off the table? F Force generator G Gravity meter H Triple beam balance J Spring scale SAISD 08 Science FMA October 09 Page 3

4 2009 Jupiterimages 11 On an overnight camping trip, a family cooked breakfast on their camp stove. The eggs were fried in the skillet due to heat being transferred by the process of A conduction B convection C conversion D radiation 13 A child sliding down a banister slowed to a stop just before reaching the bottom. When the child has stopped, the forces acting on the child can be said to be A balanced, so the sum of the forces equals zero B balanced, but with friction being the greater force C unbalanced, with gravity being the greater force D unbalanced, with the wood being the most slippery 12 In which of the following situations are forces balanced? F Hammering a nail into a piece of wood G Slipping on a patch of frozen ice H Holding a package in your hand J Drinking a milkshake through a straw SAISD 08 Science FMA October 09 Page 4

5 Change in State for a Solid 14 A solid substance at -40 C is heated until it turns into a vapor. Based on the information in the diagram above, at what temperature did the solid melt? F -40 C G 0 C H 30 C J 125 C SAISD 08 Science FMA October 09 Page 5

6 Building Blocks Structure 50 g 10.5 g Students are building a small structure following a pattern and using plastic blocks with different masses as indicated in the drawing above. If the pattern was repeated in rows 6 and 7, what would be the expected mass of row 7? Record your answer to the nearest whole centimeter and fill in the bubbles on the answer grid below. Be sure to use the correct place value. SAISD 08 Science FMA October 09 Page 6