Free Printable WEEK 23: CHEMISTRY SHORT ASSESSMENT

Worksheets

WEEK 23: CHEMISTRY SHORT ASSESSMENT

Total questions: 20

Worksheet time: 24mins

Name

Class

Date

Samuel is conducting an experiment with a closed container. He measures the energy entering the container and the energy leaving it. How does Samuel know that energy is being conserved in his experiment?

The energy that comes out of the container is not equal to the energy that comes in the container.

The energy that comes into the container is less than the energy that comes out of the container.

The energy that comes into the container is equal to the energy that comes out of the container.

The energy that comes into the container is greater than the energy that comes out of the container.

Ethan was in his classroom when he saw a device being used. He noticed the following energy transformations:
Electrical → Mechanical → Sound
Which device was Ethan most likely observing?

A triple beam balance measuring an object’s mass.

A pencil sharpener plugged into a wall outlet.

A projector displaying a diagram on the screen.

A working flashlight used to light up a dark corner.

Michael switches on a flashlight during a camping trip. Which type of energy transformation occurs when the flashlight shines?

chemical → thermal → electrical

chemical → electrical → light

thermal → chemical → light

chemical → electrical → chemical

William is riding his bicycle down a hill. As he speeds up, the energy from his muscles and the potential energy from being at the top of the hill are transformed into kinetic energy. Which statement best describes what happens to the energy during this process, according to the Theory of the Conservation of Energy?

Energy can be created, just not destroyed. It changes its form from one type to another.

Energy can never be created nor destroyed. It can only change its form from one type to another.

The total energy in our Universe changes, as different forms of energies can be transformed from each other under certain circumstances.

Energy transformations do not passively occur in our lives, rather we actively make use of energies and transform energies.

Anika is sitting in class and starts rapidly rubbing the palms of her hands together to warm them up. Which energy transformations occur as she does this?

mechanical to thermal to electrical

chemical to mechanical to thermal

mechanical to chemical to sound

chemical to sound to electrical

Grace is riding a roller coaster, as shown in the diagram. At which point is her kinetic energy at its minimum?

During a school field trip, Olivia and her friends are learning about energy. Which of the following situations is NOT an example of potential energy?

Running down a steep hill on vacation

Holding a basketball in practice

A drawn bow in an archer's hand

A baseball at its highest point in the air

William is riding a roller coaster, as shown in the diagram. At which lettered point is the potential energy stored or at its maximum point?

Grace is riding a roller coaster, and she notices that it slows down as it climbs up a steep hill. Why does this happen?

Someone stops it

Kinetic energy gets converted to Potential energy as you are gaining more height.

Kinetic energy increases because more height at the top.

Velocity is increasing thus roller coaster slows down

10.

Emma is riding her bicycle and wants to calculate her kinetic energy while moving. What is the formula for KE?

KE\ =\ mv

$KE\ =\ \frac{1}{2}v^2$

$KE\ =\ \frac{1}{2}mv^2$

$KE\ =\ \frac{1}{2}m^2v$

11.

Anika lifts a box to a shelf at a certain height. What is the formula for the potential energy gained by the box?

PE = mg

PE = mh

PE = mgv

PE = mgh

12.

A CRATE lifts 10 boxes from the ground to a height of 4 meters (m). The boxes push down with a force of 2,000 newtons (N). How much work was done by the CRATE to lift the boxes? (HINT: formula to used is work = Force x distance )

2,004 Joules

8, 000 Joules

1,996 Joules

None of the above

13.

While observing a meteor shower, Luna notices a meteor streaking across the sky at a speed of 70,000 m/s. If the meteor has a kinetic energy of 425,900,000 J, what is its mass? HINT: Formula to be used: m = 2KE/v²

0.173 kg

1.73 kg

17.3 kg

173 kg

14.

An automobile to be transported by ship is raised 7.8 meter above the dock. If its GPE is 50,000 J, what is the car's mass? (HINT: GPE = mgh)

641 kg

650 kg

605 kg

614 kg

15.

Luna watches a pendulum swing from its highest to lowest position. What happens to its kinetic and potential energy?

The PE and KE increase and decrease together

The PE decreases while the KE increases

Impossible to know without knowing the mass

16.

Grace is watching a pendulum swing back and forth in her classroom. She remembers that the conservation of energy states that energy cannot be ________ or ________, but can be altered from one form to another.

created, destryoed

gravity, force

heat, created

17.

Michael rides his bicycle to school every morning. The food he eats gives him energy, which he uses to pedal his bike. In this energy transformation, the total amount of energy:

disappeared when it transformed into another type
of energy.

decreased when it transformed into another type of
energy.

remained the same when it transformed into
another type of energy.

18.

When Daniel is riding a roller coaster and the coaster is at the bottom of a hill, it has

high potential energy

high kinetic energy

low kinetic energy

equal amounts of kinetic and potential energy

19.

Maya is observing a roller coaster as it moves along the track. She wonders if the total amount of energy in the roller coaster system will change depending on its surroundings. True or False?

true

false

20.

David, Zoe, and Lily are watching a pendulum swing back and forth in science class. As the pendulum moves from its highest point to its lowest point, what do you think happens to its kinetic and potential energy?