WorksheetsDigestion and Matter Review
Total questions: 20
Worksheet time: 47mins
Element or compound?
element
compound
Element or compound?
element
compound
The digestive system prepares food to be
transported by the circulatory system by —
exchanging food for oxygen
using food to repair heart tissue
turning food into blood cells
breaking food small into molecules that can travel through blood vessels
Which body system detects, senses, and
interprets information from inside and outside
the body. This system also controls most body
functions.
respiratory system
circulatory system
muscular system
nervous system
Which body system regulates body activities
through the use of hormones (chemical signals
made in glands throughout the body)?
immune system
endocrine system
excretory system
nervous system
Many different processes occur in the digestive
system. What distinguishes each process as a
chemical change?
mixing of substances
new substances are created
substances move to different places
substances are broken into smaller pieces
Which process involved in digestion is not a
physical change?
chewing
epiglottis blocks the trachea
saliva breaks down food
muscles push the food down
Which of the following represents a physical
change during digestion?
Teeth crush and grind food into smaller
fragments.
Saliva breaks starch (carbohydrates) down
into sugars in the mouth.
Enzymes break down food in the small
intestine.
Stomach acids break down food particles
into smaller particles.
Which of these statements best describes a
compound?
A compound is composed of atoms from
two or more different kinds of elements
that are chemically combined.
A compound is molecule composed of two
or more atoms from the same element that
are chemically combined.
A compound is molecule composed of one
atom from one element.
A compound is an atom composed of two
molecules from only one element.
Which substance in this equation is classified as an element?
CO
H2O
CO2
H2
Which of the following is a list of elements?
Water, salt, baking soda
Sodium, copper, aluminum
Silver, salt, carbon dioxide
Copper, Aluminum, Steel
Which of these choices represents a compound?
O (Oxygen element)
H2 (atoms from Hydrogen element)
KI (atoms from Potassium and Iodine elements)
He (atom from Helium element)
Which elements are in the compound Sulfuric acid (H2SO4)?
sulfur, helium, hydrogen
sulfur, oxygen, hydrogen
sulfur, nitrogen, phosphorus
silicon, hydrogen, oxygen
Which if the following represents a compound
H2 (atoms from Hydrogen element)
MgO (atoms from Magnesium and Oxygen elements)
Mn (atoms from Manganese element)
Al (atoms from Aluminum element)
Based on its chemical formula, which of the following substance has the most elements?
Urea - CH4N2O
Sodium Chloride - NaCl
Silane – SiH4
Ammonium sulfide – (NH4)2S
Which substance would complete Group B?
Neon element
Gold element
Sand compound
Lead element
In which region of the table would nonmetals be found?
Region 1
Region 2
Region 3
Region 4
Which choice correctly represents the elements and atoms in sodium sulfate?
Sodium – 2, Silicon – 1, Oxygen – 4
Nitrogen – 2, Sulfur - 4, Oxygen – 4
Sulfur – 2, Sodium - 1, Oxygen – 4
Sodium – 2, Sulfur – 1, Oxygen -4
Mammals maintain a constant body temperature by converting –
radiant energy → thermal energy
chemical energy → electrical energy
electrical energy → mechanical energy
chemical energy → thermal energy
Which mystery substances are metals?
J
K
L and N
K and N
