Worksheets7th Grade 2025 Fall Review
Total questions: 129
Worksheet time: 5hrs 45mins
How many elements are in this chemical formula?
H2SO4
1
2
3
4
How many atoms of Carbon are in this formula? C6 H12O6
6
1
12
What elements are represented in this chemical formula? Fe2O3
Iron, Oxygen
Francium, Europium, Oxygen
Ferrium, Oxygen
Berylium, Oxygen
What is the total number of atoms in this formula? H2O2
2
4
3
Which of the following is a molecule of a compound?
H2
Cl2
H2O
F2
Is this an element or a compound? CaSO4
Element
Compound
Which chemical formula correctly displays 1 atom of nickel and 2 atoms of Fluorine?
niF2
NIF2
Ni1F2
NiF2
Which element has the greatest number of atoms? AgNO3
Silver
Gold
Nitrogen
Oxygen
Molecules that are made of more than one type of atom are called?
Elements
Compounds
How many elements are in this chemical formula? NaHCO3
1
2
3
4
How many atoms of Calcium are in this formula?
H3O5CaCl7
3
5
1
7
Which of these elements is not present in NaNO3?
sodium
hydrogen
oxygen
nitrogen
How many magnesium atoms are found in MgCl2?
1
2
3
4
How many aluminum atoms are found in Al2O3?
1
2
3
4
How many atoms of carbon are in this compound?
H2C3O4N5
2
3
4
5
How man atoms of carbon are there?
1
2
3
4
How many atoms of Iron are in this compound?
1
2
3
4
What is the chemical formula for this molecule?
H1F2
H1F1
HF
HeF
Which of the following shows the elements with correct numbers of ATOMS for this molecule
H2SO4
H = 2, S = 4, O = 4
H = 2, S = 1, O = 4
H = 8, S = 4, O = 4
H = 2, SO = 4
How many atoms of Hydrogen are in this compound?
1
2
3
4
The chemical formula is C4H10. How many hydrogen atoms are in one molecule of this?
1
4
10
NaCl is the chemical formula for salt. Is NaCl considered a compound or an element?
element
compound
We breathe oxygen. Its chemical formula is O2. Is this formula an element or a compound?
element
compound
HCl has how many atoms of each element?
H=1, Cl=1
H=2, Cl=2
H=3, Cl=1
Which of the following is a chemical change?
Melting of ice
Rusting of iron
Boiling of water
Breaking a glass
What is the main difference between a chemical change and a physical change?
Chemical changes are reversible, while physical changes are not.
Physical changes involve the formation of new substances, while chemical changes do not.
Chemical changes result in new substances, while physical changes do not.
Physical changes always involve a change in temperature.
Which of the following is an example of a physical change?
Burning wood
Dissolving sugar in water
Baking a cake
Digesting food
Identify the state of matter for water at 0°C.
Solid
Liquid
Gas
Plasma
Which process represents a change of state from liquid to gas?
Freezing
Condensation
Evaporation
Sublimation
Which of the following is a sign of a chemical change?
Change in shape
Change in color
Change in size
Change in state
What happens to the molecules of a substance during a physical change?
They form new chemical bonds.
They change their arrangement or state.
They are destroyed.
They become charged.
Which of the following is an example of a chemical change?
Freezing water
Cutting paper
Cooking an egg
Mixing sand and salt
What is the state of matter characterized by having a definite shape and volume?
Solid
Liquid
Gas
Plasma
Which of the following processes is a physical change?
Burning a candle
Fermenting grapes
Melting butter
Rusting a nail
What is the term for the change of state from solid directly to gas?
Melting
Freezing
Sublimation
Condensation
Which of the following is a characteristic of a chemical change?
It is always reversible.
It involves a change in state only.
It results in the formation of new substances.
It does not involve energy changes.
Which state of matter has particles that are tightly packed and only vibrate in place?
Solid
Liquid
Gas
Plasma
What is the process called when a gas changes into a liquid?
Evaporation
Condensation
Sublimation
Freezing
Which of the following is NOT a sign of a chemical change?
Production of gas
Change in temperature
Change in state
Formation of a precipitate
Suppose you go on a trip that covers 360km and takes 6 hours. What would your average speed be?
60 km/hr
6 m/s
60 mi/hr
36 hr/m
You roll a tennis ball a distance of 18 meters it takes 6 seconds to cover the distance. What is the average speed of the tennis ball?
3 km/s
6 m/s
3
3 m/s
What is the formula to calculate distance?
d = t/s
d = s/t
d = s x t
d = s x d
What is the formula to calculate time?
t = s/d
t = d/s
t = d x s
t = s x d
___ refers to how fast an object is moving.
Speed
Velocity
Acceleration
Motion
How long will it take Jesse to run 100 meters if he averages 10 m/s?
10 s
90 s
100 s
1000 s
A runner races in the 100 meter dash. It takes her 10 seconds to finish. What is her average speed?
10 m/s
1000 m/s
100 seconds
10 seconds
Which car is going the fastest speed?
Car A-
10 miles/hour
Car B-
20 miles/hour
Car C-
30 miles/hour
Car D-
40 miles/hour
Alan travels 100 km in 5hrs. Find his average speed in km/h
5km/hr
10km/hr
50km/hr
20km/hr
If a car traveled 90 miles in 3 hours what was its average speed?
60 mph
45 mph
30 mph
90 mph
the amount of space between two places
direction
speed
distance
velocity
the distance an object moves in period of time
velocity
direction
speed
distance
What two things do you need to know to calculate speed?
direction and distance
time and direction
time and distance
distance and position
Four students were in a race. The table shows how long it took each student to finish. Who won the race?
Jason
Landon
Kyle
Alicia
A runner moves 100 meters north in 20 seconds. What is the runner’s speed?
5 m/s
5 m/s north
2 m/s
2 m/s north
A runner moves 100 meters north in 20 seconds. What is the runner’s velocity?
5 m/s
5 m/s north
2 m/s
2 m/s south
A car travels 60 km east and then 60 km west. What is the total distance traveled?
0 km
60 km
120 km
180 km
A car travels 60 km east and then 60 km west. What is the total displacement of the car?
0 km
60 km east
120 km east
180 km east
A cyclist travels 5 km north in 20 minutes. Which describes the cyclist’s speed?
0.25 km/min
0.25 km/min north
5 km/min
20 km/min north
A cyclist travels 5km north in 20 minutes. Which describes the cyclist’s velocity?
0.25 km/min
0.25 km/min north
5 km/min north
20 km/min
A toy car rolls 50 m east in 5 seconds. What is its speed?
5 m/s
10 m/s
50 m/s
0 m/s
A toy car rolls 50 m east in 5 seconds. If the toy car rolls in the same direction, what is its velocity?
5 m/s
5 m/s east
10 m/s east
50 m/s
Two runners travel 100 m each. Runner A goes straight; Runner B runs 50 m forward then 50 m back. Which has greater displacement?
Runner A
Runner B
Both equal
Cannot determine
A student moves 40 m north and then 10 m south in 10 seconds. What is the total distance traveled?
30 m
40 m
50 m
10 m
A runner moves in a straight line at 6 m/s east. What is the difference between speed and velocity in this case?
Speed includes direction; velocity does not
Velocity includes direction; speed does not
Speed and velocity are the same
Speed is slower than velocity
A ball travels 20 m forward, stops, then returns 20 m to its start. What is the ball’s speed if it took 10 seconds each way?
2 m/s
4 m/s
0 m/s
1 m/s
The runner ran from A to B to C and D. The distance is (a) and the displacement is (b) .
Distance is (a) and Displacement is (b)
4 m/s
25 m/s
19 m/s
16 m/s North
18 m/s North
30 m/s West
25 m/s East
16 m/s
How far did the bicyclist travel from 9:00 to 12:00?
40 km
120 km
0 km
60 km
A child went for a walk with their grandparents. How many seconds did the child stop to pick flowers on their walk?
20 sec
15 sec
10 sec
60 sec
Three objects are thrown and their speeds graphed. Which of the following answer choices correctly labels Object A’s path?
Getting faster
Fast, constant speed
Constant speed, at rest, return to start
No motion
Three runners ran a 200-meter dash, and data was collected. Which runner’s race includes a portion that was of constant speed?
Runner A
Runner B
Runner C
Runners A and B
A rocket travels 450 km in 60 seconds. Which distance-time graph below correctly shows the motion of the rocket?
Graph A
Graph B
Graph C
Graph D
Which two of the following line segments shows the greatest speeds?
Line segment A
Line segment C
Line segment D
Line segment F
The graph provided here shows the motion of an object. At two points, the object is at rest.
At which points on the graph is the object at rest?
Points 1 and 4
Points 2 and 3
Points 2 and 4
Points 4 and 5
Which answer correctly identifies the period of time the object in the graph above is at rest?
Line segment DE is five minutes long and shows a distance of zero.
Line segment DE is ten minutes long and shows a distance of zero.
Line segment CD is five minutes long and shows a distance of zero.
Line segment CE is ten minutes long and shows a distance of zero.
Which statement is true?
A vertical line shows that time is passing but no distance is traveled.
A vertical line shows that distance is increasing but no time is passing.
A horizontal line shows that distance is increasing but no time is passing.
A horizontal line shows that time is passing but no distance is traveled.
What is the distance traveled in the first 60 seconds shown on the distance-time graph?
100 meters
120 meters
80 meters
140 meters
What does the graph titled "Family Walk" represent?
The speed of a car over time
The distance a family walked over time
The temperature change over time
The growth of a plant over time
What was the maximum distance the family walked from their starting point?
800 m
400 m
1600 m
55 m
What was the distance covered by the family at 20 minutes?
200 meters
400 meters
600 meters
800 meters
What was the distance covered by the family at 40 minutes?
200 meters
400 meters
600 meters
800 meters
1000 meters
Where was the family at 55 minutes?
800 m away
1600 m away
Back at their starting point
400 m
Which answer choice best describes the movement of the object between the times of 0 and 6 seconds on the graph?
Moving at a constant speed
Moving toward the north
Accelerating
Stopped
What is the purpose of using distance-time graphs in measuring motion?
To record and interpret an object's motion
To measure temperature changes
To calculate the weight of an object
To determine the color of an object
At the beach, the water and sand are not absorbing and losing heat equally. Which is MOST LIKELY to occur?
rain
snow
humidity
wind
A student states the weather is the same as the climate. Which response BEST tells the student the difference between weather and climate?
Weather is about the wind and the rain, but climate is about the clouds.
Weather is measured with tools like thermometers, but climate is measured with tools like forecasts.
Weather is the conditions in one day, but climate is the conditions over a long time.
Weather is recorded on charts, but climate is recorded on world maps.
Which table correctly classifies statements about weather and climate?
Describe the motion of gas particles compared to solid and liquid particles.
Gas particles move freely and rapidly, while solid particles vibrate in place and liquid particles slide past each other.
Gas particles are tightly packed and vibrate in fixed positions, while solid particles move freely.
Gas particles move slowly and are closely packed, while liquid particles vibrate in place.
Gas particles move in a random manner, while solid particles are in constant motion and liquid particles are stationary.
Explain how temperature affects the state of matter.
As temperature increases, solids can become liquids (melting), and liquids can become gases (evaporation).
Temperature has no effect on the state of matter.
As temperature decreases, gases can become liquids (condensation), and liquids can become solids (freezing).
Temperature only affects the state of gases, not solids or liquids.
What is the effect of temperature on the density of a substance?
Generally, as temperature increases, the density of a substance decreases.
Generally, as temperature increases, the density of a substance increases.
Temperature has no effect on the density of a substance.
Density is only affected by pressure, not temperature.
How does increasing temperature affect the phase of a substance?
It causes a substance to change from gas to solid (freezing).
It causes a substance to change from solid to liquid (melting) or from liquid to gas (boiling).
It has no effect on the phase of a substance.
It causes a substance to change from liquid to solid (condensation).
What is the direction of heat transfer?
Heat travels from cool to warm.
Heat travels in all directions equally.
Heat always travels from warm to cool.
Heat does not transfer in a specific direction.
What effect does lowering the temperature have on the speed of particles in a liquid?
The speed increases.
The speed remains the same.
The speed decreases.
The speed fluctuates.
What is the relationship between temperature and molecular speed?
Higher temperatures correspond to higher molecular speeds.
Higher temperatures correspond to lower molecular speeds.
Temperature has no effect on molecular speed.
Molecular speed is constant regardless of temperature.
What is the significance of absolute zero in terms of particle motion?
At absolute zero, particle motion theoretically stops, and kinetic energy is minimal.
At absolute zero, particles move faster than at higher temperatures.
At absolute zero, particles are in a gaseous state.
At absolute zero, particles have maximum kinetic energy.
What is thermal equilibrium?
A state where two objects in contact no longer transfer heat to each other.
A condition where heat is continuously transferred between two objects.
A situation where one object is hotter than the other.
A phase where objects are at different temperatures but in balance.
Define kinetic energy in the context of particle motion.
Kinetic energy is the energy of motion; in particles, it increases with temperature.
Kinetic energy is the energy stored in a particle due to its position.
Kinetic energy is the energy released during a chemical reaction.
Kinetic energy is the energy associated with the potential of a particle to move.
What happens to the kinetic energy of particles as temperature increases?
The kinetic energy of particles decreases.
The kinetic energy of particles remains constant.
The kinetic energy of particles increases.
The kinetic energy of particles fluctuates.
What happens to the motion of particles in a liquid when its temperature is increased?
The motion of the particles slows down.
The motion of the particles speeds up.
The motion of the particles remains the same.
The motion of the particles becomes erratic.
What is the relationship between high temperature and kinetic energy?
High temperature is connected to high kinetic energy.
High temperature decreases kinetic energy.
High temperature has no effect on kinetic energy.
High temperature is inversely related to kinetic energy.
How does the motion of particles in a solid change as the temperature decreases?
Particles move faster and vibrate more.
Particles move slower and vibrate less.
Particles remain stationary and do not vibrate.
Particles move randomly in all directions.
How does heat transfer occur in a vacuum?
Through conduction, as particles collide and transfer energy.
Through convection, as warm air rises and cool air sinks.
Through radiation, as there are no particles to conduct heat.
Through direct contact between objects, allowing heat to flow.
Which has more mass, the Earth or the Moon?
Earth
Moon
Their masses are the same
Which has a STRONGER force of gravity, the Earth or the Moon?
Earth
Moon
The planet Mars has less gravity than Earth. This is because Mars has ___________ mass than the planet Earth.
less
more
the same
More mass equals:
less gravity
less distance
more gravity
more distance
Less mass equals:
less gravity
less distance
more gravity
more distance
Why do planets orbit the Sun?
The Sun is the only celestial object that has a gravitational pull.
The Sun’s chemical composition makes it attract planets.
Only celestial bodies that emit light, like the Sun, can be at the center of an orbit.
The Sun is the most massive object in our solar system, so it exerts the greatest gravitational pull.
