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Lessons 1-3

Chemistry

6th - 8th Grade

Used 12+ times

Lessons 1-3
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15 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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To decide if a chemical reaction has happened, you should measure and compare which of the following?

volume of the materials
shape of the products
properties of the substances
mass of the reactants

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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A student found 2 green powders that look the same.  He wants to figure out if they are the same substance.  Which of the following is the best method?

Measure teh mass, volume, and temperature of each powder
Combine both powders to find out if there is a chemical reaction
Mixt the two properties together and then test the properties
Determine the density, solubility, melting point of each powder and compare

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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What does this model represent?

a phase change
a substance
a chemical reaction
a mixture

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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A piece of copper is a substance because it..

is made of the same type of atom throughout
consists of many different types of atoms
can be made into something different
reacts with other substances

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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A property is ...

determined by the amount of substance
 made of one type of substance
a process to make a new substance
a characteristic of a substance

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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If you have two substances A and B and they are both solids.  Would you expect their melting points to be the same or different?

the same because they are both solid at room temperature
the same because they are made of teh same types of atoms
different because they have different mass
different because they are made of different molecules

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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You have a solid yellow powder that dissolves in water when stirred into 100 mL of water.  Predict what will happen when you stir it into 200mL of water.

it will settle to the bottom and not dissolve
it will float and then settle to the bottom and not dissolve
it will float and not dissolve
it will not settle but dissolve

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