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WorksheetsS1 Final Exam Review
Total questions: 30
Worksheet time: 15mins
Liam and Xzavyer are working on a science project. Why are scientific models important for their project?
They never change.
They make understanding harder.
They help visualize complex concepts.
They prove theories.
During a chemistry class, Avery is working on an experiment. Which of the following is an example of a safe laboratory procedure?
Eating or drinking from lab glassware.
Directly inhaling odors.
Tying back long hair and loose clothing.
Touching hot objects with bare hands.
During a science class, Anika was asked to identify which of the following is NOT a pure substance. Can you help her?
Water.
Milk.
Oxygen.
Carbon dioxide.
Which particle has the lowest mass?
Proton.
Neutron.
Electron.
Nucleus.
Jakori is making lemonade and notices that the sugar dissolves completely in the water, making it look like one clear liquid. What type of mixture is this?
Heterogeneous mixture.
Homogeneous mixture.
Compound.
Element.
Which of these is a chemical property?
Flammability.
Hardness.
Density.
Melting point.
Emma is observing a pot of water on the stove. As the water boils, the temperature of the water:
Increases.
Decreases.
Remains constant.
Fluctuates unpredictably.
What are the building blocks of matter?
Forces.
Atoms.
Magnetic fields.
Energy.
What does the formation of an ionic bond involve?
Sharing electrons.
Transferring electrons.
Transferring neutrons.
Exchanging protons.
In the periodic table, as you move from left to right across a period, the number of valence electrons:
Decreases.
Increases.
Stays constant.
Fluctuates.
The building blocks of matter are _________.
atoms
molecules
cells
compounds
_________ are found in the nucleus of an atom and have no charge.
Neutrons
Protons
Electrons
Ions
Ionic bonds involve the transfer of _________.
electrons
protons
neutrons
atoms
The number of valence electrons tends to _________ across a period.
increase
decrease
remain constant
fluctuate
While making ice cream, Zoe noticed that the temperature of the mixture _________ during the freezing process.
remains constant
increases
decreases
fluctuates
A substance that contains only one type of atom is a(n) _________.
element
compound
mixture
solution
Metals are generally good conductors of _________.
electricity/energy/
heat
water
sound
light
The most reactive metals are found in Group _________.
1
2
3
4
A _________ change produces new substances.
chemical
physical
mechanical
thermal
Elements in the same group have similar _________.
properties
colors
shapes
sizes
Atoms form bonds to become more stable.
True
False
A homogeneous mixture contains only one type of atom.
True
False
Electrons have a positive charge.
True
False
Priya is conducting an experiment to determine if a material is safe to use in her home. She needs to know if the material's flammability is a physical property. Is flammability a physical property?
True
False
Metals tend to lose electrons to form positive ions.
True
False
The nucleus contains the majority of an atom’s mass.
True
False
A phase change is a chemical change.
True
False
Elements in the same period have the same number of valence electrons.
True
False
During a chemical reaction, matter is destroyed.
True
False
Group 17 elements are called halogens.
True
False
