Grade 4 Science Braille Practice Test Answer Key

Transcription

1 Question 1 Benchmark: SC Describe a testable hypothesis and an experimental procedure Answer Key: B Four identical glass jars are painted different colors. The jars are filled with equal volumes of water and then placed in direct sunlight for four hours. The water temperature in each jar is measured at the beginning and the end of the four hours. The results of the investigation are shown below. Which of the following was most likely the hypothesis for this investigation? A. Glass jars hold more water than plastic jars. This answer is not correct. It is stated that identical glass jars are filled with equal volumes of water. Therefore, the hypothesis for the investigation is not comparing whether jars made from different materials can hold different amounts of water. B. Dark colors absorb more heat than light colors. This answer is correct. It is stated that the four identical glass jars are all painted with different colors. It is also stated that the starting temperatures and the temperatures after four hours in direct sunlight are measured. Therefore, a hypothesis for this investigation is whether dark colors absorb more heat than light colors. C. The amount of water in a jar affects water temperature. This answer is not correct. It is stated that identical glass jars are filled with equal volumes of water. Therefore, the hypothesis for the investigation is not comparing how different amounts of water in a jar affect their temperature. D. Most water evaporates in four hours. This answer is not correct. The starting temperatures and the temperatures after four hours in the sun are measured. The volume of water in each jar is not measured. Therefore, the hypothesis for this investigation is not how much water evaporates from the jar after four hours. Page 1 of 6

2 Question 2 Benchmark: SC Differentiate between an observation and an inference Answer Key: C A student performed an activity with soil and water. The table below shows the kind of soil that was added to each of two cans. After the soil was added, holes were made in the bottom of each can. Then a total of 200 milliliters of water was added to each can. The water that dripped from each can was collected for one minute. Which of the following is an observation in this experiment? A. Sunlight heats water in clay faster than water in sand. This answer is not correct. Sunlight is not part of this experimental procedure, so this statement cannot be an observation from this experiment. B. Plants grow better in clay than in sand. This answer is not correct. Growing plants is not part of this experimental procedure, so this statement cannot be an observation from this experiment. C. Water flows through sand faster than through clay. This answer is correct. An observation is information collected by the five senses. In this experiment, the student collected the amount of water that flowed through lualualei clay and sand in one minute. The student was able to see that more water flowed through the sand than through the clay in the same amount of time. D. Insects are more active in sand than in clay. This answer is not correct. Insects are not part of this experimental procedure, so this statement cannot be an observation from this experiment. Page 2 of 6

3 Question 3 Benchmark: SC Differentiate between an observation and an inference Answer Key: A A student makes a model of a volcano using paper and glue. The student s teacher puts on goggles and an apron. The teacher pours baking soda and vinegar into the volcano model. For 30 seconds, a white substance bubbles and expands out of the volcano. Which observation allows the student to conclude that a chemical reaction occurred? A. A white substance bubbled and expanded. This answer is correct. Expansion and bubbling are common pieces of evidence that a chemical reaction is occurring. B. Something happened for 30 seconds. This answer is not correct. The duration of the eruption provides no evidence that would allow the student to conclude that the eruption was caused by a chemical reaction. C. The teacher wore goggles and an apron. This answer is not correct. The safety precautions the teacher took while performing the demonstration provide no evidence that would allow the student to conclude that the eruption was caused by a chemical reaction. D. The volcano was made from paper and glue. This answer is not correct. The materials used to make the volcano provide no evidence that would allow the student to conclude that the eruption was caused by a chemical reaction. Page 3 of 6

4 Question 4 Benchmark: SC Describe how the use of technology has influenced the economy, demography, and environment of Hawai i Answer Key: D A weather satellite can take a picture of a hurricane from space and send it to Earth in seconds. How would the people of Hawaii benefit by having a picture of a hurricane so quickly? A. The picture can change the direction of the hurricane. This answer is not correct. A picture can provide information about the size and location of a hurricane, but it cannot change the path of a hurricane. B. People will know how long the hurricane will last. This answer is not correct. A picture can provide information about the size and location of a hurricane, but it cannot predict how long a hurricane will last. C. The effect of the hurricane on the beach will be changed. This answer is not correct. A picture can provide information about the size and location of a hurricane, but it cannot predict how a hurricane will affect a beach. D. People can be warned about the approaching hurricane. This answer is correct. Satellite images of hurricanes provide information about the size and location of a hurricane. This information can be shared with the public in order for people to prepare for a hurricane and make decisions on whether or not to move to safer areas. Page 4 of 6

5 Question 5 Reporting Category: Life Science Benchmark: SC Describe how different organisms need specific environmental conditions to survive Answer Key: B The table below describes some characteristics of adult bullfrogs. Some Characteristics of Adult Bullfrogs Characteristic Bullfrog Skin Eggs Mating behavior Breathing Food Moist, thin skin Jelly-coated eggs that dry out quickly when exposed to air Males produce loud croaking sounds Bring in oxygen through the skin and lungs Insects, crayfish, small minnows Which statement explains why bullfrogs need to live near water? A. Bullfrogs get oxygen from water. This answer is not correct. Bullfrogs get oxygen from air that they breathe into their lungs. B. Bullfrogs lay their eggs in water. This answer is correct. Bullfrogs and all amphibians lay their jelly-coated eggs in a water environment so that they will not dry out. C. Bullfrogs only eat organisms that live in water. This answer is not correct. Bullfrogs eat land organisms as well as water organisms. D. Bullfrogs use water to make croaking sounds. This answer is not correct. Bullfrogs use throat structures and air to produce their croaking sounds. Page 5 of 6

6 Question 6 Reporting Category: Physical, Earth, and Space Science Benchmark: SC Explain what is needed for electricity to flow in a circuit to create light and sound Answer Key: C A circuit is shown. What will happen if a wire is disconnected? A. Electricity will continue to flow. This answer is not correct. Disconnecting a wire prevents electricity from flowing. B. The battery will run out of energy. This answer is not correct. Disconnecting a wire will not drain the battery's power. Without a wire, the battery is not able to supply power to the bulb and bell. C. The bell will be unable to ring. This answer is correct. The wire moves the electricity throughout the circuit. If a wire is disconnected, electricity cannot reach the bulb or bell. D. The bulb will stay lit. This answer is not correct. Disconnecting a wire will stop electricity from reaching the bulb. The bulb will not stay lit without electricity. Page 6 of 6