G7 ESL Sc. U2

G7 ESL Sc. U2

Assessment

Flashcard

Science

7th Grade

Practice Problem

Medium

Created by

Cynthia Brown

Used 1+ times

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27 questions

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1.

FLASHCARD QUESTION

Front

An element has a metallic-gray appearance. It also has the properties of both a metal and a nonmetal.  In which section of the periodic table shown above would the element most likely be found?

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Back

3

2.

FLASHCARD QUESTION

Front

Which model correctly shows a mixture that is made of an elemental molecule and a compound? 

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Back

3

3.

FLASHCARD QUESTION

Front

Which experimental results show a mixture?

A.Ruth applies heat to a liquid, and large green crystals are left in the beaker after all the liquid has boiled away.

B.Aria applies heat to an unknown substance.  A gas is produced and an entirely new substance with new properties is left in the beaker.

C.Marcus applies heat to a liquid.  The liquid bubbles and turns into a gas.

D.Simon applies heat to a solid and the solid melts into a puddle.

Back

B

4.

FLASHCARD QUESTION

Front

A mystery element is very brittle as a solid, is not shiny, and does not conduct electricity or heat well. This element is not malleable and has a relatively low melting and boiling point. Based on the evidence, which group does the mystery element belong?

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Back

4

5.

FLASHCARD QUESTION

Front

Based on the number of valence electrons shown for the samples below, place the samples in order from the lowest number of valence electrons to the highest.

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Back

A. Na, Mg, C, Cl

6.

FLASHCARD QUESTION

Front

Which option contains only compounds?

Back

B. H20, H2O2, H3O, CO2

7.

FLASHCARD QUESTION

Front

Examine the models. Choose the model(s) that represent a pure substance.

Media Image

Back

A and C

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