DCP Review

Master elements, changes, and forces with our science review!

Sort the different characteristics with the correct type of element. Metals Metallic luster Malleable Bends without breaking Great conductor Nonmetals Not shiny Nonmetallic luster Brittle Insulator Metalloids Has properties of both metals and nonmetals Shiny Breaks easy Semi-conductors Label these different elements correctly. Properties Sample Color Blue-gray Yellow Gray Yellow Silver More dense than water Yes Yes Yes Yes No Surface appearance Shiny Dull Shiny Shiny Shiny Ability to conduct thermal energy Average Poor Excellent Excellent Good Ability to be stretched into wires None None Excellent Excellent Excellent Reaction to being hit with a hammer Shatters Shatters Bends Bends Bends Ability to conduct electricity Sometimes Poor Excellent Excellent Excellent Classification of sample Metalloid Nonmetal Metal Metal Metal Place the changes in the correct category. Physical Cutting paper Breaking glass Chewing gum Chopping wood Melting ice Boiling water Blowing bubbles Chemical Digesting food Precipitate forms New substance Gas production Making its own bubbles Increasing or decreasing its own temperature Color change A toy truck is at rest on the floor. Which statement describes the forces acting on the toy truck? The forces are balances so motion occurs. The forces are balanced so no motion occurs. The forces are unbalanced so motion occurs. The forces are unbalanced so no motion occurs. Students create a table that lists processes observed in nature.Which process describes only a physical change? Process 1 Process 2 Process 3 Process 4 The diagram shows a duck swimming in a stream in the opposite direction the stream is flowing. The duck pushes against the water, so the water pushes the duck forward with 20 newtons of force. The water also exerts 15 neats of resistive force against the duck.Which statement best describes the resulting motion of the duck? The duck will stop moving. The duck will stop and then start moving again. The duck will continue moving in its current direction. The duck will move in the direction that the stream is flowing. The names and chemical formulas of four substances are shown in the chart.Which substance listed in the chart is made up of the most atoms? Carbonic acid Nitric acid Phosphoric acid Sulfuric acid Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure? Fluorin, F, and chlorine, Cl Boron, B, and aluminum, Al Hydrogen, H, and cesium, Cs Cobalt, Co, and nickel, Ni Label the areas of the periodic table with Metals, Metalloids and Nonmetals. Metals Metalloids Nonmetals Magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen gas. Calculate the miss mass. 24g + 73g ----> 95g + 2g Iron reacts with oxygen to form iron (III) oxide, also known as rust. Find the missing mass. 224g + _ ----> 320g 544g 96g The chemical equation for the reaction between calcium hydroxide and sulfuric acid is shown below. List the element symbol, element name, and how many atoms there are of each on the reactant side. Symbol Element Name Number of Atoms Ca Calcium 1 O Oxygen 6 H Hydrogen 4 S Sulfur 1 Methane reacts with oxygen to form carbon dioxide and water. Use the given equation to list the element symbols, element names and the number of atoms on the product side. Element Symbol Element Name Number of Atoms C Carbon 1 H Hydrogen 4 O Oxygen 4 Below there are examples of balanced and unbalanced forces. Label which ones are balanced and unbalanced. Fill in the blanks with exactlyBalanced and Unbalanced Examples Balanced and Unbalanced 1 A cat resting on a chair. Balanced 2 A cat jumping on a chair. Unbalanced 3 A car driving a constant speed on a curved road. Unbalanced 4 A car driving at a constant speed on a straight road. Balanced 5 A car started driving after a light turned green. Unbalanced 6 A car stationary at a stop sign. Balanced Place the examples with the correct type of force. Balanced Force Constant speed At rest Stationary Motionless Unbalance Force Speed up Slow down Accelerate Change direction The diagram shows a duck swimming in a stream in the opposite direction the stream is flowing. The duck pushes against the water, so the water pushes the duck forward with 20 newtons of force. The water also exerts 15 neats of resistive force against the duck. What will happen to the duck if you resistance of the water is increased to 20 newtons?Which statement best describes the resulting motion of the duck? The duck will stop moving. The duck will stop and then start moving again. The duck will continue moving in its current direction. The duck will move in the direction that the stream is flowing. Calculate the net force acting on this object. 84N right 20N left 20N right 84N right Calculate the net force acting on this object and what direction is it moving? 35N upward 35N downward 35N left 35N right