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SAVVAS 7.4.2 Chemical Change

Total questions: 32

Worksheet time: 8hrs 0mins

Name
Class
Date
1.

This change is a

a)

chemical reaction

b)

physical change

c)

musical change

d)

Ice Ice baby

2.

How is a chemical change different from a physical change?

a)

there is no difference

b)

a physical change creates a new substance

c)

a chemical change creates a new substance

3.

A precipitate is a ___________ that forms when 2 liquids react together.

a)

solid

b)

liquid

c)

gas

d)

plasma

4.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
5.
Is a a rusting bicycle a chemical or physical change?
a)
chemcial
b)
physical
6.
Is melting ice a chemical or physical change?
a)
chemical
b)
physical
7.

When mixing milk and vinegar, a white, chunky, solid substance is formed. What has occurred?

a)

Physical change: state of matter

b)

Chemical change: precipitate

c)

Physical change: freezing

d)

Chemical change: new gas

8.

Boiling Water

a)

Physical Change

b)

Chemical Change

9.

A physical change is a change

a)

in an item's properties like its shape, size or density.

b)

that creates a new substance or emits light or heat

c)

that creates a smell

d)

that cannot be undone

10.

Cracking an egg is a ________________ change.

a)

Physical Change

b)

Chemical Change

11.
Baking soda and vinegar combine to make carbon dioxide
a)
Chemical Change
b)
Physical Change
12.
a)
physical change
b)
chemical change
13.

In an endothermic reaction, energy is _________.

a)

absorbed

b)

released

14.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

15.

During an exothermic reaction, heat is _________ and chemical bonds __________.

a)

released, formed

b)

absorbed, broken

c)

released, broken

d)

absorbed, formed

16.

During an endothermic reaction, heat is ________ and chemical bonds _______.

a)

released, formed

b)

absorbed, broken

c)

released, broken

d)

absorbed, formed

17.

Endo means in or _______.

a)

absorbed

b)

released

18.

Exo means out or ________.

a)

absorbed

b)

released

19.

What instrument would you use to detect an endothermic or exothermic reaction?

a)

triple beam balance

b)

ruler

c)

thermometer

20.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
21.
In an endothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released 
22.
Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?
a)
It is an exothermic reaction
b)
It is an endothermic reaction
c)
It is made of ice
d)
It is dissolving your mouth
23.
Which factors increase the rate of a reaction.
a)
increasing temperature
b)
increasing concentration
c)
increasing surface area
d)
all of these
24.
Why does a higher temperature increase the rate of a reaction?
a)
it increases both the frequency and energy of particle collisions
b)
it only increases the frequency of particle collisions
c)
it only increases the energy of particle collisions
d)
it reduces the activation energy of the reaction
25.
Why does a higher concentration increase the rate of reaction?
a)
it increases the amount of reactants
b)
it lowers the activation energy
c)
it increases the energy of particle collisions
d)
it increases the frequency of particle collisions because there are more collision sites
26.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
27.

Which root word means to believe?

a)

graph

b)

dict

c)

struct

d)

cred

28.

Which root means to watch, see, look, observe

a)

spect

b)

mis, mit

c)

vert

d)

struct

29.

What does the Latin root SPEC mean?

a)

life

b)

see, look

c)

search, find

d)

mark

30.

anti means

a)

before

b)

after

c)

do again

d)

against

31.

tact/tang means

a)

sound

b)

hear

c)

touch

d)

believe

32.

sent/sens means

a)

believe

b)

see

c)

look or watch

d)

feel

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