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Worksheets7th Science Mid-Term
Total questions: 40
Worksheet time: 22mins
Which two organelles are ONLY in the plant cell?
cell membrane
mitochondria
small vacuole
chloroplast
cell wall
Choose three of the following choices that are examples of physical changes?
shredding
solubility (dissolving)
malleability (flatten)
flammability
leaves changing color in the fall
Which three elements are very reactive?
Na
Si
Fr
Ar
Cl
Which letter refers to the negative charged particles?
A
B
C
D
Which letter refers to the particles with no charge?
A
B
C
D
What is the name of the group that contains 2 valence electrons?
alkali metals
transition metals
alkaline-earth metals
halogens
What does the atomic number stand for?
The number of neutrons in an atom.
It does not have a purpose.
The number of protons in an atom.
The number of atoms present in the element.
What is the purpose of the elements being in the same group/family?
They all have the same number of protons.
They are all the same state of matter (all solid, liquid, or gas).
They all have similar properties and characteristics that they share (ex: reactivity).
They all have the same atomic mass.
The elements to the left of the zigzag line/stairway on the periodic table are called
metals
metalloids
nonmetals
conductors
How many valence electrons does this element have?
2
4
14
16
What element is shown?
Phosphorus
Oxygen
Chlorine
Silicon
_________________ is about the relationship between pressure and volume.
Kinetic Molecular Theory
Boyle’s Law
Newton’s Law
Charles’s Law
An unexpected fog is produced in the morning. Later in the morning the sun appears and the fog disappears. What sequence has occurred?
melting, then boiling
freezing, then thawing
vaporization, then condensation
condensation, then vaporization
Using the picture, which
letter represents a gas?
A
B
C
D
Dr. Pepper is an example of
element
compound
homogenous mixture
heterogeneous mixture
When two or more different elements join together chemically…
a mixture is formed.
a compound is formed.
a substance that is the same as the elements is formed.
the physical properties of the substances remain the same.
Which of the following is an example of an element?
Co
K2O2
Na + SO4
CO
The picture represents which of the following?
element
compound
mixture of compounds
mixture of elements
Which of the following letters represents condensation?
A
B
C
D
E
Which of the following letters represents the atoms going from vibrating in place to sliding past one another?
A
B
C
D
E
Which of the following does the picture represent?
element
compound
mixture of elements
mixture of compounds
Which of the following is an example of a compound?
Au
Co
Na + SO4
K2O2
Which of the following equations is correctly balanced?
2FeS2 + O2 🡪 Fe2 + 2SO2
3FeS2 + O2 🡪 Fe3 + SO2
2FeS2 + O2 🡪 Fe2 + 4SO2
2FeS + 2O2 🡪 Fe2 + 2SO2
The law of conservation states that:
atoms are not created or destroyed in a chemical reaction.
the mass of a newly formed compound cannot be changed.
atoms can be added to the subscript.
molecules cannot be broken apart because this would result in less mass.
Which of the following correctly represents the balanced chemical reaction between aluminum and sulfur?
2Al + 3S 🡪 4Al2S3
3Al + S 🡪 2Al2S
2Al + S 🡪 4Al2S3
4Al + 6S 🡪 2Al2S3
What is the total number of “Kr” atoms pictured?
2
3
6
9
In the following chemical equation, what are the products?
2PBr 🡨 P2 + Br2
P2 + Br2
2PBr
P2
Br2
What is the main difference between a prokaryote and a eukaryote cell?
Eukaryote has a nucleus and prokaryote does not.
Prokaryote has ribosomes and eukaryote does not.
Eukaryote has cytoplasm and prokaryote does not.
They both have DNA.
Which of the following statements is false about eukaryotic and prokaryotic cells?
Prokaryotes are unicellular and Eukaryotes are multicellular.
Prokaryotic cells consist mostly of fungus, plants, and animals.
Both cells contain genetic material.
Prokaryotes have unorganized genetic material, and eukaryotes have organized genetic material.
Which cell organelle is responsible for allowing materials to come in and out of the cell?
cell membrane
cell wall
nucleus
endoplasmic reticulum
Looking at the plant cell, which organelle is responsible for storing water, food, and waste?
1
2
3
4
Looking at the plant cell, which organelle is responsible for storing genetic material (DNA) and controlling the operations of the cell?
1
2
3
4
Euglenas, Amoebas, and Paramecium are examples from which Kingdom?
Eubacteria
Protista
Fungi
Animalia
An organism was discovered by a scientist. It has a cell wall, it is unicellular, and it was found living in an extremely hot environment. What Kingdom does this organism belong to?
Eubacteria
Archaebacteria
Fungi
Plantae
An organism is pictured. It was found growing on a tree. It is multicellular, has a cell wall, but does NOT contain chloroplast. What Kingdom does this organism belong to?
Eubacteria
Archaebacteria
Fungi
Plantae
Which of the pictures demonstrates a cell that is hypotonic?
A
B
C
Which of the pictures demonstrates a cell that is isotonic?
A
B
C
The diffusion of water across a selectively permeable membrane is called…..
Osmotic pressure
Osmosis
Facilitated diffusion
Active transport
Which term describes when particle transport requires energy from the cell?
Passive transport
Osmosis
Facilitated diffusion
Active transport
Allowing molecules to pass through a cell membrane using special proteins because they are too large of chemically unable is an example of…
facilitated diffusion
diffusion
osmosis
active transport
