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WorksheetsEnd of Semester 1 Exam Review
Total questions: 56
Worksheet time: 36mins
What does the chemical formula H₂O represent?
Helium and Oxygen
Hydrogen and Oxygen
Hydrogen and Osmium
Helium and Osmium
Which chemical formula represents a compound?
O₂
NaCl
Fe
Ag
How many atoms are present in Mg(OH)₂?
3
5
6
7
Which of the following is an example of a chemical change?
Melting butter
Cutting paper
Burning a candle
Freezing water
Why is rusting iron classified as a chemical change?
The substance changes state.
A new substance is formed.
It can be easily reversed.
The appearance changes.
What is always evidence that a change is a chemical change?
Production of bubbles
Change in volume
Formation of a new substance
What happens to the solubility of sugar in water as the temperature increases?
It decreases.
It stays the same.
It increases.
It fluctuates randomly.
Which pair of substances dissolve in water?
Sand and sugar
Oil and chocolate chips
Sugar and salt
Sand and oil
Amy fixed a glass of lemonade and added too much sugar. She added water to improve the taste. What BEST describes this change?
The added water made the sugar more concentrated.
The added water diluted the sugar in the solution.
The added water reduced the solubility of the sugar.
The added water reacted with the sugar to form a new substance.
If a train moves 45 kilometers in 30 minutes, what is its average speed?
90 km/h
30 km/h
45 km/h
15 km/h
A student walks around an oval track and returns to the starting point. How does the student's average speed compare to their average velocity?
Both are zero.
Speed is greater than zero, but velocity is zero.
Speed is zero, but velocity is greater than zero.
Both are greater than zero.
Several students place a toy boat in a stream. Which could describe the boat’s velocity?
11
West
8 m/s southeast
5 m/s
A scientist observed that an ant took 6 seconds to walk 60 mm. What is the ant's average speed?
6 mm/s
10 mm/s
10 m/s
54 mm/s
Which type of thermal energy transfer occurs when warm air rises?
Conduction
Convection
Radiation
Insulation
Which statement best describes how thermal energy moves?
From colder to hotter objects
From hotter to colder objects
In random directions
From one cold object to another
The temperature of a sample of liquid decreases from 80°C to 50°C. What must be true about the particles in the sample?
They have slowed down.
They have gotten smaller.
They have spread farther apart.
They have decreased in number.
What will happen to a book resting on the dashboard of a car when the car suddenly stops?
The book will stay in place.
The book will slide forward.
The book will slide backward.
The book will remain balanced.
According to Newton’s First Law, an object in motion will:
Come to a stop without an applied force.
Continue moving unless acted upon by an outside force.
Move faster over time without external force.
Change direction without external force.
What would happen to Earth if the Sun’s gravitational pull disappeared?
It would travel in a straight line.
It would stop orbiting and stand still.
It would crash into the Moon.
It would orbit faster around the Sun.
Which characteristic of Earth’s position is most crucial for supporting life?
The tilt of the Earth's axis
Distance from the Sun
Distance from other planets
Shape of Earth’s orbit
What has the largest effect on the motion of planets in the solar system?
The gravitational pull of the Sun
The number of planets in the solar system
The rotation of planets on their axes
The gravitational pull of each planet on the others
What could increase the gravitational force between two objects?
Increasing the distance between the objects
Increasing the mass of one or both objects
Decreasing the mass of the objects
Decreasing the density of the objects
What pattern does gravity follow in space?
It acts in random directions.
It pulls objects toward the center of a system.
It repels objects with smaller mass.
It does not affect objects in space.
What is the chemical formula for table salt?
O₂
CO₂
H₂O
NaCl
Which of the following is an example of a physical change?
Rusting iron
Cooking an egg
Burning wood
Melting ice
Which of the following processes is an example of a chemical change?
Melting ice
Burning wood
Freezing water
Boiling water
Describe the motion in the graph:
Constant Speed (positive slope)
Stopped (at rest)
Acceleration (increasing speed)
Return Home (negative slope)
Which is faster?
walking
skating
biking
What is the largest planet in
our solar system?
Neptune
Jupiter
Uranus
Mars
Transfer of thermal energy through "touch"
conduction
convection
radiation
Transfer of thermal energy through "flow" of liquids or gasses
conduction
convection
radiation
Which is an example of conduction?
a furnace heating the air in a school
an ice cube melting in a person’s hand
a pot of water on a stove boiling
the sun heating water in a swimming pool
The movement of liquid in a lava lamp
Conduction
Convection
Radiation
Sitting by a campfire
Conduction
Convection
Radiation
Water boiling in a pot
Conduction
Convection
Radiation
Burning your hand on an iron
Conduction
Convection
Radiation
What kind of heat transfer happens when the sun is heating your body?
Conduction
Radiation
Convection
Density
A runner runs 40 meters in 8 seconds. What is the speed?
6m/s
5m/s
3m/s
10m/s
Which is a velocity?
5m/s
8m/s/s
12m/s N
15m/s
Which is an example of a solvent?
Salt
Water
Sugar
Powdered ice tea mix
What kind of pure substance forms when two elements chemically combine?
an element
a mixture
a compound
a solution
Which statement best describes an element?
pure, made of more than one type of atom
when combined, a chemical reaction forms
pure, made of only one type of atom
can be broken down easily
When two or more different elements chemically combine, a __________________________ is formed.
element
compound
mixture
solution
This picture represents which of the following?
element
compound
The main substance in a solution that dissolves other substances.
solute
solvent
solution
solubility
How fast a substance dissolves in a liquid.
Rate of Dissolution
Surface Area
Aqueous Solution
Solubility
Which of the following is a factor that affects how quickly something dissolves?
Temperature
Color
Shape
Weight
What is the solute in the process of making sweet tea?
Tea
Sugar
Water
Sweet Tea
