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WorksheetsUnit Two Test #1 Review
Total questions: 30
Worksheet time: 22mins
Name
Class
Date
1.
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
2.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
3.
A change in the size, shape, or state of matter.
a)
chemical change
b)
physical change
c)
chemical reaction
d)
electron change
4.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
5.
What is an example of a Chemical change?
a)
Ripped paper
b)
boiled egg
c)
cracked egg
d)
sugar in water
6.
Which of the following is an example of an AUTOTROPH?
a)
Appletree
b)
Dog
c)
Mushroom
d)
Human
7.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
8.
Plants need ________ for photosynthesis
a)
oxygen
b)
soil
c)
carbon dioxide
d)
sugar
9.
What is photosynthesis?
a)
The process in which humans eat their food
b)
When a photographer takes a photo.
c)
To get your pictures from the photo lab.
d)
The process in which plants make their food.
10.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + Sugar
b)
CO2 + sugar + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + Sugar
d)
CO2 + O2 + H2O --> Light+ Sugar
11.
Mixtures can be separated using chromatography.
a)
True
b)
False
12.
Which separation technique would you use to find out how many pigments are contained in grass?
a)
Filtration
b)
Evaporation
c)
Distillation
d)
Chromatography
13.
The smallest particle of matter is
a)
an atom
b)
a molecule
c)
a nucleus
d)
a proton
14.
The center of an atom is the
a)
nucleus
b)
molecule
c)
electron
d)
proton
15.
The subatomic particles found in the nucleus are
a)
A. protons and electrons
b)
B. only the neutrons
c)
C. protons and neutrons
d)
D. neutrons and electrons
16.
The atomic number is the same as
a)
the number of protons
b)
the number of neutrons
c)
the atomic weight
d)
the protons plus the neutrons
17.
Two or more atoms that stick together are
a)
An element
b)
A molecule
c)
Always a solid
d)
Never a gas
18.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
19.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
20.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
21.
The structure that allows gases to enter and exit plant leaves
a)
Flowers
b)
Stomata
c)
Roots
d)
Stems
22.
Which of the following is NOT true
a)
Stomata are mostly on the underside of leaves
b)
Stomata open to let CO2 out and O2 in
c)
Stomata open to let CO2 in and O2 out
d)
The number of open stomata varies in different environmental conditions
23.
The two bean shaped cells that control the opening and closing of the stomata are
a)
Guard cells
b)
Wall cells
c)
Chloroplasts
d)
Celly cells
24.
What happens to the structures shown in the picture when the weather is really hot and dry?
a)
They close.
b)
They open.
c)
They absorb water.
d)
They release water.
25.
When holding the microscope, you should have one hand under the base and the other ______
a)
Holding the body tube
b)
Holding the stage
c)
Holding the arm
d)
Holding the objectives
26.
What power do you start with when using a microscope?
a)
High
b)
Medium
c)
Low
27.
Never use this knob on high power.
a)
Fine Adjustment
b)
Large Focus
c)
Coarse Adjustment
d)
Small Focus
28.
Salt water is a mixture.
a)
True
b)
False
29.
Water is
a)
a pure substance
b)
a mixture
30.
Copper is a mixture.
a)
True
b)
False
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