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IPC Unit 8: Changes in Matter

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.

A change in which property for a substance is an indication of a chemical reaction?

a)

State of Matter

b)

Mass

c)

Odor

d)

Volume

2.

  1. Why are the properties of the products of a chemical reaction different from the properties of the reactants?

a)

  1. The products combine the properties of the reactants.

b)

  1. The products have the strongest properties of the reactants.

c)

  1. The reactants lose their properties during the reaction.

d)

  1. The products are different substances with unique properties.

3.

Combustion reactions, especially those with hydrocarbons, yield which two products.

a)

Carbon Dioxide

b)

Oxygen

c)

Water Vapor

d)

Metal Oxide

4.

  1. The products are different substances with unique properties. Select two correct answers.

a)

  1. Color change

b)

  1. Change of state of matter

c)

  1. Gas produced

d)

  1. Precipitate formation

e)

  1. Increased volume in the test tube

5.

What will happen to the pH of lemon juice and the pH of baking soda if they are mixed together?

a)

  1. The pH of both will go up.

b)

  1. The pH of both will go down.

c)

  1. The pH of lemon juice will go up; the pH of baking soda will go down.

d)

  1. The pH of lemon juice will go down; the pH of baking soda will go up.

6.

Identify the equation that is balanced, and therefore conserves atoms.

a)

N2 + H2 → 2NH3

b)

  1. 2N2 + 2H2 → 4NH3

c)

  1. 2N2 + 3H2 → 2NH3

d)

  1. N2 + 3H2 → 2NH3

7.

  1. Use the balanced chemical equation shown to determine how many sodium chloride (NaCl) compounds would result from combining 6 sodium (Na) atoms with 3 chloride (Cl2) molecules.

2Na   +   Cl2   →   2NaCl

a)

  1. 3 NaCl

b)

  1. 2 NaCl

c)

  1. 6 NaCl

d)

  1. This cannot be determined with the information provided.

8.

Identify the equation that is balanced

a)

  1. 2KI + Pb(NO3)2 → 2KNO3 + PbI2

b)

  1. 2KI + Pb(NO3)2 → KNO3 + 2PbI2

c)

  1. KI + Pb(NO3)2 → KNO3 + PbI2

d)

  1. 2KI + 2Pb(NO3)2 → KNO3 +2 PbI2

9.

Use the image of the reaction between magnesium and oxygen above to choose the balanced equation that accurately reflects the model.

a)

  1. Mg +2O → MgO2

b)

  1. Mg2 + O2 → 2MgO

c)

  1. 2Mg + O2 → 2MgO

d)

  1. Mg2 + O → Mg2O

10.

  1. A chemical reaction is modeled by the particle diagram provided. Students developed a few representative chemical equations for the information provided in the model and were asked to determine if the reaction obeys the law of conservation of mass. Which chemical equation is an accurate representation of the model, and which claim is supported by the model?

    Select two correct answers.

a)

  1. 6X + 3Y → 6XY

b)

  1. 6X2 + 3Y2 → 6X2Y

c)

  1. 12X + 6Y → 6X2Y

d)

  1. Claim: The reaction obeys the law of conservation of mass.

e)

  1. Claim: The reaction does not obey the law of conservation of mass.

11.

Which nuclear reaction is not very useful because it is very difficult to control?

a)

Fusion

b)

Beta Decay

c)

Positron Emission

d)

Fission

12.

How does nuclear fission create electricity?

a)

  1. The atom splits, releasing energy that is used for electricity.

b)

  1. The atoms splits, releasing neutrons that are used for electricity.

c)

  1. The energy that is released creates steam for generators to make electricity.

d)

  1. The neutrons that are released power generators that make electricity.

13.

Why are there so many safety regulations on Nuclear power plants?

a)

We don't know enough about fission, so we need to be cautious

b)

Fission reactions require extreme heat to take place

c)

Fission is a chain reaction that can get out of control

d)

OSHA

14.

Other than electricity generation, what is nuclear energy used for?

Select two

a)

Medical Purposes

b)

Space Exploration

c)

Cooking

d)

Solar Panels

15.

Chemical processes in factories sometimes add thermal energy to water. When the water in a river or lake increases in temperature, this could affect the plants and animals living in the water because–

a)

  1. warm water holds less oxygen than cool water.

b)

  1.  warm water holds more oxygen than cool water.

c)

  1. aquatic plants and animals can live in a broad temperature range.

d)

  1. all the aquatic plants and animals affected will die.

16.

  1. The plants near a landfill are slowly dying. What could explain this?

a)

  1. Air pollution from the landfill damages the leaves of the plants.

b)

  1. The landfill uses up water in the area, causing the plants to dry out.

c)

  1. Chemical end products from the landfill seep into the soil and are absorbed by the plants.

d)

  1. The landfill creates greenhouse gases in the area that make it too hot for the plants.

17.

  1. This image shows that a lot of the Arctic sea ice has melted since 2000. Simultaneously, the amount of carbon dioxide, methane, and other similar gases has increased in the atmosphere. Based on the evidence provided, what is the best explanation for the melting of the sea ice?

a)

  1. Acid rain

b)

  1. Air pollution

c)

  1. Global warming

d)

  1. Thermal pollution

18.

  1. What is created when chemicals in air pollution react with water in the atmosphere?

a)

Smog

b)

Greenhouse Gases

c)

Acid Rain

d)

Toxins

19.

A coal-fired power plant uses water from a local lake to cool the steam produced back into liquid water. This mixture of hot water and lake water is dumped back into the lake. Trout and bass living in the lake have been dying off since the plant was opened. Based on the evidence, what sort of impact is the chemical reaction the plant using having on the lake?

a)

  1. Greenhouse effect

b)

  1. Thermal pollution

c)

  1. Soil degradation

d)

Global Warming

20.

Matter is neither created nor destroyed

a)

Conservation of Energy

b)

Conservation of Matter

c)

Conservation of Thermal Dynamics

d)

Conservation of life

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