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Worksheetssemester review
Total questions: 67
Worksheet time: 1hrs 11mins
How many carbon (C) atoms are in the chemical formula C2(H4O2)3 ?
1
2
3
4
How many Hydrogen atoms are present?
How many atoms of Oxygen are in this compound?
K2(MnSO2)4
4
8
2
6
How many Oxygen atoms are present?
This is an example of what kind of change?
explosive change
chemical change
density change
physical change
Select the physical change.
This number tells the number of atoms present.
Using the example below as your guide, count the atoms in the following chemical formula: 3H₃PO₄
(a)
fireworks
physical
chemical
cutting your hair
physical
chemical
When could be happening between B and C?
Tom is walking home
Tom is running
Tom is staying at the same place
Tom is climbing a mountain
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
An object travels 150 meters in 30 seconds. What is its average speed?
3 m/s
5 m/s
10 m/s
15 m/s
During which time interval did the runner move the fastest?
0 min to 10 min
10 min to 30 min
40 min to 60 min
70 min to 80 min
Calculate the average speed of the entire trip.
5.45 m/s
4 m/s
6 m/s
1 m/s
A student walks 50 meters in 100 seconds. Calculate the speed.
0.5
0.5 m/s
500 m/s
2 m/s
What is the speed of the object during segment B?
0.5 m/s
1.3 m/s
2 m/s
2.5 m/s
Water boils due to what type of heat transfer?
Conduction
Convection
Radiation
A Curling Iron is able to curl hair due to what type of heat transfer?
Conduction
Convection
Radiation
What type of heat transfer takes place during Sun Bathing?
Conduction
Convection
Radiation
What type of heat transfer is taking place in the Mantle?
Conduction
Convection
Radiation
Your feet will burn on hot sand because of this type of heat transfer that is taking place between the bottom of your foot and the sand.
Conduction
Convection
Radiation
What type of heat transfer is taking place in a Lava lamp?
Conduction
Convection
Radiation
What type of heat transfer is taking place when you Microwave Food?
Conduction
Convection
Radiation
Food remains warm because of the heat lamps above them, this type of heat transfer is called?
Conduction
Convection
Radiation
Hot coffee is stirred with a spoon; the spoon gets hot due to
conduction
convection
radiation
Near the ceiling of a room the air is warmer; the warm air rises because of
conduction
convection
radiation
Some cook pans have cooper on the bottom to heat evenly.
Copper transfers heat to the pan by
conduction
convection
radiation
In a swimming pool, water near the surface is slightly warmer. The warm water rises because of
conduction
convection
radiation
A huge rock at the state park gets hot during the day. The rock was warmed from the Sun by
conduction
convection
radiation
You lay on a hot rock at night and keep warm from the rock by
conduction
convection
radiation
What is the main difference between speed and velocity?
Speed includes direction, while velocity does not.
Velocity includes direction, while speed does not.
Speed and velocity are the same.
Speed is measured in meters, while velocity is measured in seconds.
A runner completes a 400-meter lap around a track in 50 seconds. What is the runner's speed?
8 m/s
0 m/s
50 m/s
400 m/s
A train travels 200 km east in 4 hours. What is its average velocity?
50 km/h
50 km/h east
200 km/h
200 km/h east
If an object moves in a circle and returns to its starting point, what is its displacement?
Equal to the circumference of the circle
Equal to the radius of the circle
Zero
Equal to the diameter of the circle
A dog running at 3 m/s
A deer sprinting at 4 m/s
A migrating bird headed south for the winter at 3 m/s
A person not moving at all
Five students were asked to come up with examples of velocity, and their results are displayed in the table below. Which students created accurate examples of velocity?
Select TWO correct answers.
What would happen to the planets in the solar system if the Sun's gravitation force disappeared?
They would stay still
They would fly away in straight lines
They would explode
They would stop rotating
What two factors affect the gravitational force between two objects?
inertia
distance
mass
eccentricity
What two factors keep our moon in orbit around Earth?
inertia
mass
velocity
gravity
Which force in the Solar System is similar to the tension in the string?
The diagram shows forces that keep the planets and other bodies in orbit in the solar system. What should number 3 be labeled?
moon
earth
gravity
inertia
orbit
The diagram shows forces that keep the planets and other bodies in orbit in the solar system. What should number 4 be labeled?
moon
earth
gravity
inertia
orbit
Which of the following would cause more gravitational attraction between Jupiter and one of its moon, Io?
Increasing the distance between Jupiter and Io
Increasing the mass of Jupiter
Decreasing the mass of Io
Decreasing the distance of Io from the Sun
Why does the Moon orbit Earth instead of the Sun?
Gravity depends on distance and the Moon is closer to Earth.
Only large objects orbit around the Sun and the Moon is too small.
The Moon used to be part of Earth so it must orbit Earth.
The Moon is moving too fast and cannot change its orbit.
Comets are one kind of body in the Solar System. What will LIKELY be the change in the motion of a comet if the Sun’s gravity were to disappear and only inertia were acting on the comet?
The comet will slowly come to rest in space.
The comet will continue to move in a straight line.
The comet will stop moving in its path and fall into the Sun.
The comet will start moving past the Sun at a much faster rate.
How do the orbits of comets compare with the orbits of planets?
Comets and planets have the same type of orbit.
Comets move in circular orbits, where planets move in more elliptical orbits.
Comets have highly elliptical orbits, where planets are slightly elliptical.
Comets have predictable orbits and planets do not.
Abigail and Michael decided to go on a road trip. They drove 240 km for the first 4 hours and then continued to drive another 360 km for the next 6 hours. What was the average speed of their journey?
50 km/h
55 km/h
60 km/h
65 km/h
What is the speed of segment A?
0.5 m/s
1.66 m/s
30 m/s
2 m/s
Cesar drove from Houston to Dallas in 4 hours. Dallas is roughly 250 miles NW of Houston. What was his average speed?
1000 mph
62.5 mph
55 mph
60 mph
Jose Altuve is at batting practice for the Houston Astros.
What was the average speed of all three hits?
32 m/sec
20.7 m/sec
24 m/sec
27 m/sec
