Study Island. Generation Date: 04/01/2014 Generated By: Cheryl Shelton Title: Grade 4 Physical Science

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1 Study Island Copyright 2014 Edmentum - All rights reserved. Generation Date: 04/01/2014 Generated By: Cheryl Shelton Title: Grade 4 Physical Science 1. When you move the switch of a flashlight to "on," the light goes on. When you move the switch of a flashlight to "off," the light goes off. How does this happen? The switch in the "on" position closes the circuit, and the electricity flows through the flashlight bulb. The terminals of the flashlight are the battery and the bulb. When these are connected, the bulb will light. The wire in the flashlight is considered an insulator, and when the insulator is "on", you will have a closed circuit, lighting the bulb. When the switch is moved to the "on" position, it opens the circuit, and electricity flows through the flashlight bulb.

2 2. Lewis has some play dough. He puts a thermometer in the play dough and then holds the dough in his hand, being careful not to touch the thermometer If heat flows from his hands to the play dough, what will happen to the thermometer reading? The temperature will go up first and then down. The temperature will not change. The temperature will go down. The temperature will go up. 3. Which part of the pencil is most likely to be the poorest insulator of electricity? Z X Y W

3 4. A student weighed 9.1 ounces of water. Then he weighed 2.1 ounces of salt. He added the salt to the water and stirred until the salt was all dissolved. What is the weight of the final solution? 7.0 ounces 11.2 ounces 2.1 ounces 9.1 ounces 5. Ashley thinks her backpack is too heavy. She decides to weigh her backpack with her books and binder inside. Then, she weighs each book and binder that was inside her backpack. Finally she weighs her backpack while it is empty. She writes all the weights in a table. Item Weight (in pounds) math book 3 science book 2 binder 1 backpack 1 full backpack 7 </ Looking at the table, she notices that adding up the weights of all the items in the backpack equals the total weight of the full backpack. What does this show about weight? The weight of a full backpack does not depend on what is in it. The weight of a whole object is more than the sum of the weights of its parts. The weight of a whole object is equal to the sum of the weights of its parts. The weight of a whole object is less than the sum of the weights of its parts. 6. Mrs. Grayson asked her class to bring one object from home to complete the electric circuit that they built in class. Some of the items that students brought are shown below.

4 paperclip string fishing line pencil penny The only things that made the circuit's light bulb light were the paperclip and the penny. Why is that? The penny and paperclip are insulators. The string, fishing line, and pencil were wet. The paperclip and the penny are conductors. The string, fishing line, and pencil were not tried. 7. Clothing acts as insulation to keep body heat in. Bryan wants to know whether a wool sock or a cotton sock will be better at keeping heat in. He puts the wool sock around cup 1 and the cotton sock around cup 2 and then fills both cups with hot water. How can he tell which sock is a better insulator? measure which cup of water stays hot the longest measure the temperature of each sock by itself measure the temperature of the air measure how long it takes to drink the water 8. When a warm soda can is placed in an ice chest full of ice, the soda can heat and the ice heat until they are both the same temperature. gains; loses holds; shares shares; holds loses; gains

5 9. Gina's father puts two marshmallows on metal sticks. He holds the marshmallows over a fire. The marshmallows turn brown and begin to melt. What causes the marshmallows to change? Heat moves from the marshmallows to the metal sticks. Heat moves from the fire to the marshmallows. Heat moves from the marshmallows to the fire. Heat moves from the metal sticks to the marshmallows. 10. Joel puts a handful of cold berries on a hot stack of pancakes. Which of the following will happen? The pancakes and berries will both stay the same temperature. The berries will increase in temperature. The berries will decrease in temperature. The pancakes will increase in temperature. 11. Samantha went to the grocery store and bought some fruit, some meat, a few boxes of cereal, and a few canned items. When Samantha got home from the store, she put the bag on a scale. It weighed 35 lbs. How many pounds of canned items must Samantha have bought, if the bag weighed 1 lb, the fruit weighed 7 lbs, the meat weighed 9 lbs, and the cereal weighed 2 lbs? 16 lbs

6 17 lbs 18 lbs 19 lbs 12. Look at the diagram below. Will this circuit allow electricity to flow? No; the battery in the circuit above is not charged. Yes; the wire connected to the light bulb is electrically charged. No; electrical currents need a complete loop of wires in order for electricity to flow. Yes; the light bulb will get energy from the battery. 13. Katie built a structure out of plastic, snap-together blocks like the one shown below. Each block weighed 2 ounces. If the structure Katie built contained 4 blocks, how much did the structure weigh? 42 ounces 48 pounds 6 ounces 8 ounces 14. Gina's mother makes her an ice cream sundae. She pours hot fudge over the cold ice cream and the ice cream begins to melt. Why does the ice cream begin to melt? Heat from the fudge moves to the ice cream. Heat from the ice cream moves to the fudge.

7 Heat from the ice cream moves to the air. Heat from the container moves to the fudge. 15. Which of the following objects is the best insulator of electricity? W. X. Y. Z. W Y X Z 16. Clark has a toy chick. The chick has part of an electric circuit inside it. When something connects the chick's two feet, it can complete the circuit. When the circuit is closed, the toy chick makes chirping sounds. In which of these situations will the chick be silent? W X Z Y W. X. Y. Z. 17. Electrical energy can produce many other types of energy. When electricity runs through a light bulb, what other type of energy is produced? chemical energy

8 sound energy light energy mechanical energy 18. The chair shown below is made up of wood, plastic and metal. If the chair were taken apart and separated into piles based on material type, the wood pile would weigh 15 pounds, the plastic pile would weigh 2 pounds, and the metal pile would weigh 2 pounds. How much does the chair weigh when it is put together? 19 pounds 17 pounds 18 pounds 227 pounds 19. Which of the following is a complete closed circuit through which electricity will flow? W. X. Y. Z. Z W X Y 20. Shannon broke her pencil into 4 pieces and found the weight of each piece. Using the picture above, what was the weight of the whole pencil before Shannon broke it?

9 20 g 18 g The weight cannot be determined. 23 g