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1st 9 Weeks Review

Total questions: 30

Worksheet time: 51mins

Name
Class
Date
1.

Which of these atomic models is the oldest?

a)
b)
c)
d)
2.

This model discovered that atoms have a very tiny, positively charged center where most of the mass is found. Which one is it?

a)
Nuclear Model
b)
Plum Pudding Model
c)
Electron Cloud Model
d)
Billiard Ball
3.
What distinguishes each element from all others, and gives it unique physical and chemical properties?
a)
The number of protons
b)
The number of neutrons
c)
The electron configuration
d)
The element's universal origin
4.

Fluorine is atomic number 9 and has a mass of 19. How many neutrons would it have?

a)

9

b)

6

c)

19

d)

10

5.
If an atom temporarily gains or loses one or more electrons, it is considered a/an ___.
a)
ion
b)
isotope
c)
new element
d)
metalloid
6.

A substance has a pH of 4. This should be classified as ___.

a)

an acid

b)

a base

c)

a reactive matter

d)

an inorganic compound

7.

Which of these descriptions is a chemical property of a substance?

a)

Acidic

b)

Soluble in water

c)

Boils at 212oF

d)

Reddish in color

8.

Helium is a gas at room temperature.  This is an example of a —

a)

physical property

b)

chemical property

c)

mixture

d)

compound

9.

Which solution has a density greater than 1.0 g/mL?

a)

Mass = 2.3g Volume = 1.1mL

b)

Mass = 15g Volume = 20mL

c)

Mass = 7.8g Volume = 8.7mL

d)

Mass = 600g Volume = 715mL

10.
All of the following are physical properties except ____.
a)
Reactivity
b)
Boiling point
c)
Shape
d)
Solubility
11.
A student boils water in a pot with a lid. He notices that steam is generated and water droplets form on the inside of the lid. What type of change was this?
a)
Chemical Change: a new substance is formed.
b)
Physical Change: a new substance is formed.
c)

Chemical Change:  the chemical make-up remains the same.

d)

Physical Change: the chemical make-up remains the same.

12.

Which of these is a chemical change?

a)

A pan rusting

b)

Bending a paper clip

c)

Chopping carrots

d)

Ice cubes melting

13.
What is an example of an exothermic reaction?
a)

Campfire

b)

Baking a cake

c)

Popping popcorn

d)

Grilling chicken

14.

This number on the left represents how many molecules there are in a chemical formula.

a)
an atom
b)
the subscript
c)
a molecule
d)
the coefficient
15.

What are the reactants in this equation?

4Al + 3O2 → 2Al2O3

a)

4Al

b)

3O2

c)

2Al2O3

d)

4Al + 3O2

16.

Is this balanced?


2Al + 3O2 → 2Al2O3

a)

Yes, all the elements are balanced.

b)

No, O is not balanced.

c)

No, Al is not balanced.

17.

Which of the following is true for sodium (Na)?

a)

Its atomic number is 11, its atomic weight is 22.99, and it is in the same family as magnesium (Mg).

b)

Its atomic number is 22.99, its atomic weight is 11, and it is in the same family as potassium (K).

c)

Its atomic number is 11, its atomic weight is 22.99, and it is in the same family as potassium (K).

d)

Its atomic number is 22.99, its atomic weight is 11, and it is in the same family as magnesium (Mg).

18.

Which of the following is an ionic bond?

a)

KBr

b)

CH4

c)

SO

d)

NI3

19.

At which point does a roller-coaster have the greatest potential energy?

a)

At the top of the tallest hill

b)

At the bottom of the tallest hill

c)

As it is climbing up the tallest hill

d)

Potential energy never changes

20.

If the boy in the picture jumps off the diving board, what energy conversion will take place?

a)

Potential to kinetic

b)

Kinetic to potential

c)

Electrical to light

d)

Thermal to kinetic

21.

Which of the following converts chemical energy to light and thermal energy?

a)
Battery
b)
Person riding a bike
c)

Car

d)

Fireplace

22.
Which of the following converts chemical energy to mechanical energy?
a)
Battery
b)
Person riding a bike
c)

Car

d)

Fireplace

23.

The volume of water in the pot decreases during this investigation. Water droplets form on the mirror when positioned over the pot. In this setup, water —

a)

condenses and then vaporizes

b)

vaporizes and then condenses

c)

freezes and then vaporizes

d)

vaporizes and then freezes

24.
Which state of matter has a definite shape (keeps its shape) and a definite volume (keeps its size)?
a)
solid
b)
liquid
c)
gas
d)
plasma
25.

In which state of matter do atoms have so much kinetic energy the electrons strip away from positive nuclei, creating ions?

a)
solid
b)
liquid
c)
gas
d)
plasma
26.
As an ice cube melts, its temperature ___.
a)
stays the same
b)
increases
c)
decreases
d)
fluctuates
27.
The figure shows a glass and bathtub full of water at the same temperature. What statement describes the amount of heat in the glass and bathtub?
a)
The bathtub full of water has more heat than the glass of water.
b)
The glass of water has more heat than the bathtub full of water.
c)
The heat of both the glass and bathtub full of water is 33 degrees. 
d)
The heat of both the glass and bathtub full of water is 66 degrees. 
28.
What temperature scale should be used to label thermometer number 2?
a)
Celsius
b)
Kelvin
c)
Fahrenheit
d)
Absolute
29.

On very cold nights, a family builds a fire in the fireplace to help warm their cabin. Sam, who sits by the fire, feels the heat first, while Steven, who is upstairs, feels the heat after a couple of hours. Which statement is true?

a)

Sam feels the heat by radiation, and Steven feels the heat by convection.

b)

Sam feels the heat by conduction, and Steven feels the heat by radiation.

c)

Sam feels the heat by convection, and Steven feels the heat by conduction.

d)

Sam feels the heat by radiation, and Steven feels the heat by conduction. 

30.

Which of these uses conduction to transfer thermal energy?

a)

electric toaster

b)

steam iron

c)

hairdryer

d)

deep fryer

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