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Worksheetsscience
Total questions: 24
Worksheet time: 18mins
Name
Class
Date
1.
Is "a glass of milk becoming sour" physical or chemical?
a)
Chemical change
b)
Physical change
2.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
3.
What characteristic defines all chemical changes?
a)
There is a change of state.
b)
Electricity is produced.
c)
A new material is formed.
d)
Bubbles are produced.
4.
Is "cutting wood" a chemical or physical change?
a)
Chemical change
b)
Physical change
5.
Is corroding metal a chemical or physical change?
a)
physical
b)
chemical
6.
This scientist discovered and named the cell.
a)
Robert Hooke
b)
Anton Van Leeuwenhoek
c)
Goldberg
d)
Mathias Schleiden
7.
Which of the following is NOT a cell theory.
a)
All non-living things are made of cells
b)
All cells come from pre-existing cells
c)
Cells are the basic unit of structure and function of all living things
8.
This scientist discovered and named the cell.
a)
Robert Hooke
b)
Anton Van Leeuwenhoek
c)
Goldberg
d)
Mathias Schleiden
9.
Where are proteins made? These are small, grain-like or rod shaped organelles.
a)
Golgi body
b)
Mitoichondrion
c)
Chromosomes
d)
Ribosomes
10.
This organelle is like a recycling center for the cell. It breaks down old materials. It is like a vacuum cleaner that cleans up the waste in cells.
a)
Ribosomes
b)
Lysosomes
c)
Mitochondria
d)
Chloroplasts
11.
Plants perform photosynthesis through this organelle. It captures energy from the sun and uses it to produce food for the cell.
a)
Chlorophyll
b)
Chloroplasts
c)
Mitochondria
d)
Golgi Apparatus
12.
what is a group on the periodic table?
a)
Broken Substance
b)
Rows
c)
columns
d)
The weeknd
13.
what is a period on the periodic table?
a)
group
b)
column
c)
Row
d)
the weeknd
14.
What does the Atomic number tell you about an element?
a)
Its favorite number
b)
Protons and Electrons
c)
Protons
d)
Neutrons
15.
How many valence electrons does an atom need to have to be very reactive?
a)
1 & 7
b)
2 & 3
c)
6 & 8
d)
3 & 4
16.
The law of conservation of mass states...
a)
Mass can be created and destroyed
b)
Mass can not be created nor destroyed
c)
something contains mass
d)
Nothing can be desttroyed
17.
What is a non-metal?
a)
dull
b)
Bad conductivity
c)
right side of the periodic table
d)
all of the above
18.
How do you find atomic mass?
a)
Add protons and electrons
b)
add protons and neutrons
c)
add the atomic mass and the electrons
d)
None of these
19.
Which indicates that it is a physical change?
a)
Odor change
b)
Color change
c)
Rearranged atoms
d)
Change in size
20.
Which is a chemical change?
a)
Paper torn in half.
b)
melting butter.
c)
Expired cheese.
d)
Hair cutting.
21.
Which is a chemical change?
a)
Paper torn in half.
b)
melting butter.
c)
Expired cheese.
d)
Hair cutting.
22.
How many valence electrons does Oxygen have?
a)
6
b)
8
c)
4+4
d)
4
23.
How do you count atoms in a chemical equation.
a)
Add the subscripts and multiply coefficients to the element.
b)
Add an element at a time and add the coefficients at the end.
c)
You just use your hand.
d)
Multiply with subscripts and add with the coefficients.
24.
How do you tell if a chemical equation is balanced?
a)
same amount of atoms on both sides of the equation.
b)
Same amount of atoms for all elements on both sides of the equation.
c)
After you add and subtract.
d)
Ask the teacher.
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