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WorksheetsDay 1 - 8th Science STAAR Review
Total questions: 21
Worksheet time: 42mins
Name
Class
Date
1.
Which of the following statements best describes the subatomic particle at location X?
a)
It has a very large mass and is negatively charged.
b)
It has almost no mass and no charge.
c)
The charge of the subatomic particle at location x is opposite of the charge at location y.
d)
It has a positive charge similar to location y.
2.
How does the mass of location y compare to the mass at location x?
a)
Location y has a mass multiple thousand times larger than location x.
b)
Location y has a mass only slightly larger than location x.
c)
Location x and y have the same mass.
d)
Location x has a mass twice as large as location y.
3.
What are the names of the two subatomic particles located at y?
a)
protons and electrons
b)
neutrons and protons
c)
neutrons and electrons
d)
protons and neutrinos
4.
Which of the particle in the chart below is a neutron?
a)
Particle A
b)
Particle B
c)
Particle C
d)
None of the above
5.
Sara creates a chemical reaction between sodium and chlorine. How many valence electrons are transferred between the two atoms in the model below?
a)
1 electron
b)
2 electrons
c)
3 electrons
d)
4 electrons
6.
In question 5, what identifies the atom on the left as sodium (Na)?
a)
Sodium always has an equal balance of neutrons and electrons.
b)
No other atom can have only one valence electron.
c)
Only sodium can chemically react and bind with chlorine.
d)
Sodium is the only element with 11 protons.
7.
Which of these atoms will be more reactive and why?
a)
Atom A, because it has fewer electrons.
b)
Atom A, because it has unequal charges.
c)
Atom B, because it gives up a valence electron.
d)
Atom B, because it more neutrons.
8.
Michael eats a cookie at lunch. Which of the following actions during the digestive process is a chemical change?
a)
Michael chewing the cookie before swallowing.
b)
Enzymes in Michael’s saliva breaking down the sugar compounds.
c)
Michael abdominal muscles pushing the cookie through the small intestines.
d)
Small amounts of water being absorbed from the cookie in the large intestine.
9.
Miriam is investigating the reaction between magnesium metal with oxygen in the laboratory. What safety issues should Miriam be aware of?
a)
Magnesium metal is not very reactive. Miriam should only wear an apron to protect her clothes from spills.
b)
The reaction will produce carbon monoxide, a toxic gas.
c)
Magnesium is very reactive with oxygen. Miriam should wear goggles, gloves, and an apron.
d)
Water will be produced. She will need a beaker to collect the liquid.
10.
The tendency of an element to react with other elements to produce compounds.
a)
Chemical change
b)
Neutrality
c)
Reactivity
d)
Valence
11.
A subatomic particle that has almost no mass and a negative charge.
a)
Electricity
b)
Proton
c)
Electron
d)
Neutron
12.
The number of protons in the atoms of a particular element that is unique only to that element.
a)
Atomic Mas
b)
Atomic Number
c)
Proton Number
d)
Mole
13.
A positively charged subatomic particle located in the nucleus and has an atomic mass of 1.
a)
Neutron
b)
Valence
c)
Proton
d)
Electron
14.
A collection of orbitals around the nucleus, each having its own energy level.
a)
Proton Shells
b)
Electron Shells
c)
Orbital Shells
d)
Nucleic Shells
15.
A neutral subatomic particle located in the nucleus.
a)
Electron
b)
Proton
c)
Neutron
d)
None of the above
16.
The number of negatively charged particles in the most outer shell.
a)
Valence Electrons
b)
Valence Neutron
c)
Valence Proton
d)
Valance Particles
17.
The mass of an atom equal to the number of protons and neutrons.
a)
Atomic Number
b)
Atomic Mass
c)
Optimal Mass
d)
Atomic Weight
18.
A chemical substance made up of two or more kinds of atoms bonded together.
a)
Mixture
b)
Solution
c)
Compound
d)
None of the above
19.
The reaction between substances that results in new substances with different properties.
a)
Property Change
b)
Substance Change
c)
Reaction Outcome
d)
Chemical Change
20.
A pure substance containing only one type of atom.
a)
Element
b)
Simple Substance
c)
Single Substance
d)
Mixture
21.
The center of an atom that contains the proton and neutrons and has a positive charge.
a)
Shell
b)
Orbital
c)
Nucleus
d)
Center Mass
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