Study Island Copyright 2014 Edmentum - All rights reserved. Generation Date: 12/10/2014 Generated By: Cheryl Shelton Title: Grade 7 Blizzard Bag 2014-2015 Science-Day 1 1. Which statement is true about the properties of the majority of the elements in the far left column of the periodic table? They have no luster. They have low heat conductivity. They have low electrical conductivity. D. They are highly reactive. 2. A slice of cheese is 3.0 C and is sitting on a dish that is 3.0 If the dish and cheese are in a refrigerator that is set to 3.0 C, which of the following statements is true? Heat will not flow because there is no temperature difference between the substances. The temperature of the air in the refrigerator will decrease and the temperature of the cheese will increase. The temperature of the cheese will increase and the temperature of the dish will decrease. D. Heat will flow from the air in the refrigerator to the cheese and the dish.
3. Most of the metals on the periodic table are located I, II, and III I and II only III only D. II and III only I. on the left II. in the middle III. on the right
4. Which of the following word pairs correctly completes the sentence below? are corrosive substances characterized as having a strong smell, a sour taste, and a. Bases; ph less than 7 Bases; ph greater than 7 Acids; ph greater than 7 D. Acids; ph less than 7 5. Which of the following is true about mixtures and compounds? A mixture contains different substances that are not chemically combined with one another. Mixtures and compounds are both made of two or more different substances. A compound forms when different substances chemically combine to form a new substance. D. all of these
6. Which diagram below shows how the particles of a solid will most likely change when they are heated? W. X. Y. Z. Z W X D. Y
7. An individual with an excellent sense of smell is handed a bottle of perfume. After smelling the perfume, he reports that the perfume contains a predominant smell of roses with a faint touch of vanilla. If the perfume is made from water, rose essence, and a splash of vanilla, what type of substance is the perfume most likely to be? element gas compound D. mixture 8. Which of the following is true for compounds? They can be created by chemical reactions. They can be separated into their component elements through physical means. They can consist of no more than two types of elements. D. They all have the same properties regardless of their elemental composition. 9. Which of the following statements is true? There is an equal number of metals and nonmetals on the periodic table. The metals on the periodic table are usually found as gases. There are more metals than nonmetals on the periodic table. D. There are more nonmetals than metals on the periodic table. 10. Hydrogen gas (H 2 ) and oxygen gas (O 2 ) react to form liquid hydrogen peroxide (H 2 O 2 ). Which statement is true about the reaction?
The two gases have mixed together, but a new substance has not formed. The product that is formed has the same physical properties as the reactants. The atoms of the reactants have combined to form a new substance. D. The same atoms are present, so the chemical properties are the same. 11. Many acids come from chemical supply companies in specially-coated glass bottles with extra-thick walls. What is the most likely characteristic of an acid that requires a special container? sour taste strong smell dark color D. corrosive nature 12. Even if you don't touch a marshmallow to a campfire flame, holding a marshmallow near a flame causes it to toast and turn brown. Why does this happen? Heat radiates from the fire and cooks the marshmallow. Dust blowing through the air causes the marshmallow to brown. Smoke and soot from the fire cause the marshmallow to brown. D. Hot air in the atmosphere cooks the marshmallow.