SCI-PS
Owens PS.5
1
[Exam ID:S1YMZ3] Scan Number:499
What is an example of a physical change?
A Rusting of iron
B Eating foods
C Adding bleach to a washer of clothes
D Boiling water
2
What statement is correct about the energy within the phase change in a closed system?
F Existing energy was destroyed.
G The amount of energy remained the same.
H New energy was created.
J Energy was created and destroyed.
3
When matter undergoes a change in form, but the chemical make up is NOT changed, it is a —
A physical change
B nuclear reaction
C chemical reaction
D chemical change
4
What is NOT a physical change?
F Ice cubes melting
G Burning a candle
H Bending a paper clip
J Chopping onions
5
What is an example of an exothermic reaction?
A grilling chicken
B popping popcorn
C baking a cake
D exploding fireworks
6
How many oxygen atoms are in the chemical formula Al(PO4)3?
F
G
H
J
7
12
4
3
1
A chemical reaction that absorbs energy is called —
A exothermic
B synthesis
C decomposition
D endothermic
8
According to this equation, what happened to the carbon and oxygen?
F They combined physically to form a new element.
G They combined chemically to form a new compound.
H They combined physically to form a new mixture.
J They combined chemically to form carbon and oxygen.
9
The process of joining two atoms’ nuclei and releasing an enormous amount of energy is called—
A nuclear fusion
B nuclear meltdown
C nuclear fission
D nuclear isotope
10 What might be a concern raised by community members if they were told that a nuclear power plant was going to be built in their neighborhood?
F Excessive use of petroleum would leak into the water under the ground
G The air pollution generated by the plant
H The threat of a nuclear accident or spill
J Coal could be used to produce more energy per gram of fuel
11 The process of splitting an atom’s nucleus and releasing a large amount of energy is called —
A nuclear fission
B nuclear fusion
C nuclear meltdown
D nuclear isotope
12 Cierra is on a camping trip with her parents. They decide to build a campfire to cook their dinner. The burning fire is an example of a —
F chemical and endothermic change
G physical and exothermic change
H chemical and exothermic change
J physical and endothermic change
13 What is an example of a chemical change?
A Evaporating gasoline
B Freezing water
C Boiling a liquid
D Burning a wooden splint
14 Which process is a physical change?
F Tarnishing silver
G Rusting iron
H Melting ice
J Burning coal
15 All elements in the same group have the same number of —
A protons
B neutrons
C atomic mass units
D valence electrons
16
Which of the following lists the elements in order, from those having the least protons to those having the most protons in the atoms?
F Rb, K, Na, Li
G Na, S, Al, Cl
H O, S, Se, Te
J O, N, B, Li
17
The diagram above shows a block from the periodic table. The number six represents the —
A atomic number of the element carbon
B number of valence electrons in the element carbon
C number of neutrons in the element carbon
D atomic mass of the element carbon
18 A type of chemical bond in which electrons are shared between elements is called —
F an ionic bond
G a valence bond
H a chemical bond
J a covalent bond
19
According to the data in the table, which sample of matter is most likely a metal?
A 3
B 1
C 4
D 2
20 In the chemical formula for ammonia, NH , what does the subscript 3 represent?
3
F
G
H
J
The number of nitrogen and hydrogen atoms in each molecule of ammonia
The number of nitrogen atoms in each molecule of ammonia
The number of hydrogen atoms in each molecule of ammonia
The number of ammonia molecules that will bond together