Presentation on theme: "8 th Grade Science T-Cap Practice Chemical Reactions Forces of Nature Q 100 Q 200 Q 300 Q 400 Q 500 Q 100 Q 200 Q 300 Q 400 Q 500 Solids, Liquids, Gases,"— Presentation transcript:
8 th Grade Science T-Cap Practice Chemical Reactions Forces of Nature Q 100 Q 200 Q 300 Q 400 Q 500 Q 100 Q 200 Q 300 Q 400 Q 500 Solids, Liquids, Gases, Oh My! Life Science Odds n Ends
100 Question Chemical Reactions The pH of a weak acid is A 9.1 B 8.2 C 7.0 D 6.5
100 Answer Chemical Reactions ?? D 6.5
200 Question Chemical Reactions A student applies heat to a solid substance. Which indicates that a chemical change occurred? A.The substance becomes a liquid but solidifies when cooled. B.The substance changes color and stays that color when cooled. C. The substance goes from liquid to gas very quickly. D. The substance expands but stay s the same color.
200 Answer Chemical Reactions ?? B. The substance changes color and stays that color when cooled.
300 Question Chemical Reactions Which of these represent chemical change? A. A match lit, creating a yellow-orange flame B. A small piece of ice melts, changing from a solid to a liquid C. A ball of clay sinks in the water, and floats when reshaped. D. A pot of water is heated to boiling, and evaporation occurs.
300 Answer Chemical Reactions ?? A. A match lit, creating a yellow-orange flame
400 Question Chemical Reactions A chemical equation is shown below: The element zinc (Zn) can best be described as a A.Compound B.Mixture C.Gas D.reactant
400 Answer Chemical Reactions ?? D.Reactant (Starting material in a chemical reaction)
500 Question Chemical Reactions Which sample equation best illustrates the law of conservation of mass? A.12 grams reactant X + 10 grams reactant Y ---- 2 grams product Z B.5 grams reactant E + 5 grams reactant F --- 20 grams product G + 5 grams product H C.4 grams reactant U + 3 grams reactant V --- 7 grams product W D.10 grams reactant Q + 9 grams reactant R --- 90 grams product S + 90 grams product T
500 Answer Chemical Reactions ?? C. 4 grams reactant U + 3 grams reactant V --- 7 grams product W
100 Question The Arctic environment has temperatures that range between -22° C and 6° C with snow covering some of the area. Which adaptation would most likely help a population of organisms survive this environment? A.Long necks and tall legs B.Large shell and leathery skin C.Light colored fur and layers of blubber D.Brightly colored feathers and webbed feet Life Science
100 Answer Life Science ?? C. Light colored fur and layers of blubber
200 Question A student observes a tree with small needle-like leaves that stay green year round. Which conclusion can the student draw from the shape of the leaves? A.The leaves of the tree do not perform photosynthesis. B.The leaves of the tree have an illness that stunts their growth. C.The leaves of the tree are nonfunctional. D.The leaves of the tree are intended to reduce water loss.
200 Answer Life Sciences ?? D. The leaves of the tree are intended to reduce water loss.
300 Question Life Science Which organisms are most likely to be the same approximate age? A.1 and 3 B.3 and 5 C.2 and 4 D.5 and 6 Compare the fossil layers
300 Answer Life Science ?? C. 2 and 4
400 Question Life Science Two fossils that appear to be from the same type of organism are found in two different layers of rock. The layers of rock are shown here. Which can be determined from the location of the fossils? A.The prey of the organisms B.The predators of the organism C.The cause of death for each organism D.The relative age of each organism
400 Answer Life Science ?? D. the relative age of each organism
500 Question Life Science To what class does the organism belong? A.Cestoda B. Gastropoda C. Trematoda D. Bivalvia
500 Answer Life Science ?? B. Gastropoda
100 Question Forces of Nature What keeps earth in its orbit? A.The rotation of earth B.The gravity of the sun C.The revolution of the moon D.The gravity of the moon
100 Answer Forces of Nature ?? B. The gravity of the sun
200 Question Forces of Nature A nuclear power plant has recently been built to generate electricity for a town located near several small lakes. Which is not a benefit of this nuclear power plant being built? A.The cost of the electricity will decrease. B.The loss of habitat for local wildlife. C.The heating of homes will be easier. D.The nuclear power plant will supply jobs.
200 Answer Forces of Nature ?? B. The loss of habitat for local wildlife.
300 Question Forces of Nature A student coils a copper wire around a bar magnet. Which action will cause the device to generate electricity? A. The student connects the copper wire to a light bulb. B. The student insulates the copper wire with plastic. C. The student uses a horseshoe magnet instead of a bar magnet. D. The student moves the bar magnet through the copper wire coils.
300 Answer Forces of Nature ?? D. The student moves the bar magnet through the copper wire coils.
400 Question Forces of Nature Wire coils spinning between two magnets will produce A.cold B.electricity C.steam D.chemicals
400 Answer Forces of Nature ?? B. Electricity
500 Question Forces of Nature Which diagram shows an apparatus that is correctly set up to produce and measure electricity?
500 Answer Forces of Nature ??
100 Question Solids, Liquids, Gases Oh My! The graph below represents the percentages of gases that make up the atmosphere of Earth. Which gas is represented in the portion labeled 1 on the graph? A.Argon B.Hydrogen C.Nitrogen D.Oxygen
200 Question Solids, Liquids, Gases Oh My! Which diagram best shows the type of particle arrangem ent associated with a gas?
200 Answer Solids, Liquids, Gases Oh My! ??
300 Question Solids, Liquids, Gases Oh My! A student performed a classroom investigation by mixing a purple liquid and a white powder. Diagrams of the setup and the resulting blue solid are shown. The student could best classify this reaction as a A.Physical change B. Weight change C. mass change D. Chemical change
300 Answer Solids, Liquids, Gases Oh My! ?? D. Chemical change
400 Question Solids, Liquids, Gases Oh My! A student designs an experiment to test the acidity of the water in several ponds near an industrial area. Which tool would best help a student obtain accurate data? A.Oxygen probe B.Metric ruler C.pH indicator D.Heat sensor
500 Question Solids, Liquids, Gases Oh My! Which properties most likely indicate that a substance is a base? A.Releases hydrogen gas and reacts with metals B.Turns red litmus blue and conducts an electric current C.Turns blue litmus red and conducts an electric current D.Has a pH below seven and corrodes a nail
500 Answer Solids, Liquids, Gases Oh My! ?? (Bases feel slippery, change litmus blue, and become less basic when mixed with acids) B. Turns red litmus blue and conducts an electric current
100 Question odds and ends The main biofuel on the market today is ethanol, a fuel made from corn. Which type of bioengineered product is ethanol? A.Adaptive B.Assistive C.Resistant D.Manipulated
100 Answer odds and ends ?? A.Adaptive
200 Question odds and ends Which statement best describes what the planet Saturn, a lizard, and a steaming kettle have in common? A. All are made of atoms. B. All are multicellular organisms. C. All are at the same internal temperature. D. All produce their own energy without help.
200 Answer odds and ends ?? A. All are made of atoms?
300 Question Odds and Ends A student observes that a gas is formed when chemical Y is added to chemical Z in the lab. The students observation of a new product being formed is the common outcome of all A. Physical changes B. Chemical changes C. Mass changes D. Phase changes
300 Answer Odds and Ends ?? B. Chemical Changes
400 Question Odds and Ends The molecular arrangement of a solid is best represented in a.Diagram 3 b.Diagram 1 c.Diagrams 1 and 2 d.Diagrams 2 and 3
400 Answer Odds and Ends ?? B. Diagram 1
500 Question Odds and Ends A 5-gram sample of water occupies 5 milliliters of space in a beaker. Using the formula, what is the density of the water sample? A.1 gram/milliliter B.5 grams/milliliter C.10 grams/milliliter D.25 grams/milliliter
500 Answer odds and ends ?? A. 1 gram/milliliter