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Individual Work #1- I Semester 9th Grade

Total questions: 22

Worksheet time: 2hrs 50mins

Name
Class
Date
1.

A phase change requires the addition or removal of _________ in a system.

a)

particles

b)

energy

c)

chemical bonds

d)

flexibility

2.

What state of matter does this picture represent?

a)

solid

b)

liquid

c)

gas

d)

plasma

3.
The molecules in the picture are tightly held together with little movement. They have shape and energy.  Therefore, the picture represents _________.
a)
solid
b)
liquid
c)
gas
d)
plasma
4.
If the tops were removed from the cylinders, the following would happen:
a)
The solid would fly out of the container
b)
The liquid would fly out of the container.
c)
The gas would fly out of the container.
d)
They ALL would fly out of the container.
5.

When energy (heat) is added to matter, the particles ______________.

a)

speed up and move closer

b)

speed up and move farther apart

c)

slow down and move closer together

d)

slow down and move farther apart

6.

When energy (heat) is removed from matter the particles ...

a)

speed up and move farther apart

b)

speed up and move closer together

c)

slow down and move farther apart

d)

slow down and move closer together

7.

What characteristics best describe a liquid?

a)

Indefinite shape, indefinite volume (both shape and volume changes)

b)

Definite shape, definite volume (both shape and volume stays the same)

c)

Definite shape, indefinite volume (shape stays the same, volume changes)

d)

Indefinite shape, definite volume,( Shapes changes, volume stays the same)

8.

Which of the following is not true about gases?

a)

They spread out to fill their containers

b)

They have lots of energy

c)

The particles move very slowly.

d)

The volume changes with whatever shape the room is.

9.

Why does liquid candle wax flow but solid candle wax does not?

a)

Because the particles of a liquid candle wax are softer than the particles of a solid candle wax

b)

Because the particles of a liquid candle wax are moving but particles of a solid candle wax are not

c)

Because the particles of a liquid candle wax can easily move past one another but the particles of a solid candle wax cannot

d)

Because the particles of a liquid candle wax weigh less than the particles of a solid candle wax

10.

Why can gases be compressed (pushed together) more easily than solids?

a)

Because the particles of gases move faster than the particles of solids

b)

Because the particles of gases are farther apart than the particles of solids

c)

Because the particles of gases are softer than the particles of solids

d)

Because the particles of gases weigh less than the particles of solids

11.
What does this picture represent? 
a)
solid
b)
liquid 
c)
gas
d)
plasma
12.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
13.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
14.
What type of mixture is this?
a)
homogenous mixture
b)
chemical
c)
heterogeneous mixture 
d)
solid mix
15.
A homogeneous mixture of particles so small that they can not be seen with a microscope and that will never settle to the bottom of their container
a)
colloid
b)
solution
c)
suspension
d)
tyndall effect
16.

Changing the phase, size or shape of something represents a _____________.

a)

Chemical change

b)

Physical Change

c)

Physical property

d)

Chemical Reaction

17.

When you change a substance into a new substance a _______________ is occuring.

a)

Partial Change

b)

Physical Change

c)

Chemical Change

d)

Freezing

18.

Which of the following is a example of physical change ?

a)

burning of wood

b)

photosynthesis

c)

melting of ice-cream

d)

ripening of fruit

19.

What kind of proccesses may we observe during a chemical change?

a)

Gas formation

b)

Change in temperature

c)

Change in color

d)

All of the above

20.
Which is NOT a physical property?
a)
odor
b)
reacts with acid
c)
ability to conduct electric current
d)
hardness
21.
Which of the following is a chemical change?
a)
human digestion
b)
cutting a tree down
c)
melting a chocolate bar
d)
Has a density of 1 gm/mL
22.
What kind of properties can only be observed when a substance changes into a different substance?
a)
physical properties
b)
chemical properties
c)
liquid properties
d)
real properties

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