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Worksheets7th Grade Science- Review for Test #1
Total questions: 26
Worksheet time: 15mins
Name
Class
Date
1.
What is a physical property of matter?
a)
Something you can sense with one of your 5 senses (color, texture, smell)
b)
The chemical properties of an element
c)
How strong an element is
d)
The heat of combustion of a molecule
2.
What is the atomic number of an element?
a)
The number of protons + number of neutrons
b)
Number of electrons
c)
Number of protons
d)
Number of neutrons
3.
What is matter?
a)
Something that takes up no space or mass
b)
Something that is important and "matters" to you
c)
Something that takes up space and has mass
d)
Something that is a solid, liquid, or gas
4.
What does the Kinetic Theory of Matter state?
a)
Thats everything is made up of cells
b)
That everything is made up of Skittles
c)
Thats everything is made up of atoms that are in constant motion
d)
That everything moves around all the time
5.
What is an atom made of?
a)
Protons, neutrons, and electrons
b)
Protons, neutrons, and electricity
c)
Protons, internet, and WiFi
d)
Protons, potato chips, and salsa
6.
What is an element made of?
a)
hundreds of atoms
b)
thousands of atoms
c)
millions of atoms
d)
trillions and trillions of atoms
7.
Is a Compound an Element?
a)
No, a compound is made of elephants
b)
No, a compound is made of elements
c)
Yes, a compound and element are the same
d)
Yes, elephants make up compounds
8.
Which of these is an example of a physical property?
a)
Boiling point
b)
Heat of combustion
c)
Corrosiveness
d)
Toxicity
9.
What is the boiling point of water?
a)
100o Celsius
b)
100o Farenheit
10.
What is the atomic mass of the above element?
a)
1
b)
1.0078
c)
2.0156
d)
0
11.
What is water made up of?
a)
2 molecules of hydrogen, 1 of oxygen
b)
1 molecule of hydrogen, 1 of oxygen
c)
3 molecules of oxygen, 2 of hydrogen
d)
2 molecules of hydrogen, 2 of oxygen
12.
What is CO2?
a)
Carbon Monoxide
b)
Water
c)
Hydrogen Peroxide
d)
Carbon Dioxide
13.
If water boils and evaporates, what does it become?
a)
Air
b)
Carbon Gas
c)
Nothing; it's still water, just in gas form
d)
Orange soda
14.
Which of these is a chemical change?
a)
Ice melting
b)
Turning on the sink
c)
Water boiling
d)
hydrogen mixing with oxygen to make water
15.
What is F-, and why does it have a minus sign?
a)
It's an isotope; it has less neutrons
b)
It's an ion; it has 1 less electron
c)
It's an isotope; it has 1 extra electron
d)
It's an ion; it has 1 extra electron
16.
List these structures by increasing levels of organization (smallest to largest):
Element - Atom - Compound
Element - Atom - Compound
a)
Atom < Element < Compound
b)
Element < Compound < Atom
c)
Compound < Element < Atom
d)
Atom < Compound < Element
17.
Why don't electrons add to the atomic mass of an element?
a)
They weigh too much
b)
They weigh too little
c)
They're not cool enough
d)
They're "Negative Nancy's"
18.
What is an isotope?
a)
An element with a different number of neutrons
b)
An element with a different number of protons
c)
An element with a different number of electrons
d)
An element with a different name
19.
Why is the Atomic Mass of an element NOT a whole number?
a)
Because elements aren't whole
b)
Because the atoms are small
c)
Because it's the average of the masses of all the isotopes
d)
Because elements are Jedi
20.
What are the states of matter?
a)
The United States of Matter
b)
Liquid, Solid, Gas, and Radiowaves
c)
Solid, Liquid, Gas, and Plasma
d)
How much something matters to me
21.
Why does a compass point North?
a)
Because the Earth has a magnetic field
b)
Because the compass is metal
c)
Because it's smart
d)
Because it's pointing to Santa Claus in the North Pole
22.
What is an element?
a)
A pure substance made up of gold
b)
A pure substance made up of water molecules
c)
a pure substance made up of atoms
d)
a mixed substance made up of different molecules
23.
What does hydrogen and carbon have in common?
a)
They are both metals
b)
They are both gases
c)
They are both compounds
d)
They are both elements
24.
Can an atom be separated?
a)
No, it is the smallest unit of matter
b)
Yes, ever heard of an atom bomb??
c)
It can be separated into compounds
d)
It can dissolve in water
25.
Why did Professor Dave say that Combustion is an example of a physical change?
a)
Because combustion doesn't change the properties of the substance
b)
He never said that; Combustion is a chemical change!!!!
c)
Because he needs a haircut
d)
Because he knows everything about chemistry
26.
If the Atomic Mass of an element is 42, and the Atomic Number is 20, how many Neutrons are there?
a)
22 neutrons
b)
20 protons
c)
21 electrons
d)
20 neutrons
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