NEW
Font size
S
M
L
XL
WorksheetsEnergy & Cycling of Matter
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
Which consumers gets the most energy from the producers?
a)
Shark
b)
Herring
c)
Phytoplankton
d)
Crustaceans
2.
Which of the following energy pyramid represents the flow of energy in the food web shown starting with producers (bottom) to tertiary consumer (top)?
a)
Grass -> Bird -> Eagle -> Snake
b)
Grass -> Rabbit -> Bird -> Eagle
c)
Eagle -> Lizard -> Worm -> Grass
d)
Grass -> Worm -> Bird -> Eagle
3.
Which of the following is an organic compound?
a)
NH4
b)
CH2OH
c)
Na Cl
d)
CuSO3
4.
How many atoms of nitrogen are in the molecule of CH2N4OH
a)
1
b)
2
c)
3
d)
4
5.
What information can you get from the following formula?
NH4OH
NH4OH
a)
How many atoms of each element
b)
How many molecule of the compound
c)
The physical properties of the compound
d)
How the molecule is arranged physically
6.
Which of the is a chemical formula for the molecule shown?
a)
CH2OH
b)
CH2OH
c)
CHO
d)
CH2O2
7.
A willy wagtail is an omnivore. It eats leaves, seeds, and worms, which also eats the leaves. Its predator the snakes and bobcats has to catch it first. Which of the following shows the correct flow of energy?
a)
Snakes -> Willy -> Leaves -> Worms
b)
Willy -> Leaves -> Worms -> Snakes
c)
Leaves -> Worms -> Willy -> Bobcats
d)
Leaves -> Seeds -> Willy -> Worms -> Snakes -> Bobcat
8.
What are the most elements in an organic compound?
a)
Nitrogen, Carbon, and Helium
b)
Calcium, Nitrogen, and Water
c)
Nitrogen, Calcium, and Oxygen
d)
Carbon, Oxygen, and Hydrogen
9.
Which of the following equation is balanced?
a)
CuCl + H2O --> CuOH + HCl
b)
2Ca + Cl2 --> CaCl2
c)
2Fe + 3O2--> 2Fe2O3
d)
H2 + Cl2--> HCl
10.
Which of the following observation is evidence of a chemical reaction?
a)
A substance dissolves in another substance.
b)
A substance evaporates.
c)
2 solutions mix and they bubbles form.
d)
A substance gets absorbed.
11.
Which element has similar properties as Sodium (Na)?
a)
Magnesium (Mg)
b)
Potassium (K)
c)
Chlorine (Cl)
d)
Beryllium (Be)
12.
What property of an atom is most related to its reactivity?
a)
Its number of protons
b)
Its number of neutrons
c)
Its atomic mass
d)
Its number of valence electrons
13.
How many hydrogen atoms are in the formula for isopropyl, CH3C3OH5
a)
1
b)
3
c)
5
d)
8
14.
Based on the Periodic Table, which two elements are in the same period?
a)
Li and Na
b)
K and Mg
c)
Ca and Cl
d)
Na and Cl
15.
Which of the formula below is an element?
a)
CO
b)
H2O
c)
He2
d)
CO2
16.
This element has 11 protons and 1 valance electron. Which of the following is true of this element?
a)
The element is Na and is highly reactive.
b)
He element is B and is highly reactive.
c)
The element is Na and is not highly reactive.
d)
The element is B and not highly reactive.
17.
Which element react like Br but has a greater atomic mass?
a)
Se
b)
Cl
c)
I
d)
Ar
18.
Which of the following is true of all chemical changes?
a)
Heat is given off.
b)
A state of matter occurs.
c)
A change in odor occurs
d)
A new substance is formed.
19.
What element is represented by the model shown?
a)
Berylliun (Be: atomic number 4)
b)
Boron (B: atomic number 5)
c)
Hydrogen (H: atomic mass 4)
d)
Fluorine (F: atomic number 9)
20.
Which of the following is a balanced equation for photosynthesis?
a)
CO2 + H2O --> C6H12O6
b)
6CO2 + 6H2O --> C6H12O6 + 6CO2
c)
6CO2 + H2O --> C6H12O6 + CO
d)
CO2 + H2O --> C6H12O6 + 6CO2
Reset
