Worksheet Solutions: Biology and Environmental Projects - 2 | DIY Science Fun: Cool School Projects - Class 6 PDF Download

Fill in the Blanks

Q1: A water dispenser is a device used for conveniently pouring ______________ into a bottle or vessel.
Ans: water

Q2: The construction of a water dispenser involves attaching cardboard pieces to create a cube shape and a lift for the ______________.
Ans: bottle

Q3: To pass a straw through the cover cardboard, a small ______________ is made on the front side.
Ans: hole

Q4: The functioning of a water dispenser relies on the fundamental principles of ______________ and ______________.
Ans: pressure, gravity

Q5: One of the key benefits of a homemade water dispenser is the ability to incorporate a ______________ for ensuring water purity.
Ans: filter

Q6: The homemade water dispenser minimizes the risk of ______________ when the lid is closed.
Ans: leakage

Q7: Creating a water dispenser using readily available materials is both cost-effective and provides the opportunity for ______________.
Ans: customization

Q8: Safety glasses should be worn to protect your ______________ while working on the water dispenser project.
Ans: eyes

Q9: Hot melting glue should be handled with care to avoid ______________ or ______________.
Ans: burns, injuries

Q10: When working on the water dispenser project, it's important to have supervision from ______________ or responsible adults.
Ans: parents

Multiple Choice Questions

Q1: What is the primary purpose of a water dispenser?
(a) To create a cardboard structure
(b) To store and dispense water conveniently
(c) To recycle plastic bottles
(d) To study gravity
Ans: (b) To store and dispense water conveniently
A water dispenser is designed for the convenient pouring of water into a container.

Q2: What are the two fundamental principles on which the functioning of a water dispenser relies?
(a) Recycling and waste reduction
(b) Pressure and gravity
(c) Sustainability and environmental impact
(d) Cover cardboard and hot melting glue
Ans: (b) Pressure and gravity
The water dispenser works based on pressure and gravity, allowing water to flow when the cap is open.

Q3: What feature can be incorporated into a homemade water dispenser to ensure water purity?
(a) Hot melting glue
(b) A clear plastic bottle
(c) A filter
(d) Origami paper
Ans: (c) A filter
A homemade water dispenser can include a filter to ensure the cleanliness and purity of dispensed water.

Q4: What advantage does a homemade water dispenser have over traditional containers in terms of water wastage?
(a) It has a leak-proof design.
(b) It is cost-effective.
(c) It is customizable.
(d) It uses hot melting glue.
Ans: (a) It has a leak-proof design.
Unlike traditional containers, a homemade water dispenser minimizes the risk of leakage when the lid is closed.

Q5: Why is it important to work under supervision while constructing the water dispenser project?
(a) To complete the project faster
(b) To avoid using cardboard
(c) To ensure safety and prevent accidents
(d) To study fluid dynamics
Ans: (c) To ensure safety and prevent accidents
Working under supervision helps ensure safety, especially when using tools like hot melting glue and sharp knives.

True and False

Q1: True or False: A water dispenser is primarily used for recycling plastic bottles.
Ans: False
A water dispenser is used for storing and dispensing water conveniently.

Q2: True or False: The functioning of a water dispenser is based on the principles of pressure and gravity.
Ans: True
The water dispenser relies on pressure to allow water to flow and gravity to pull it down.

Q3: True or False: The homemade water dispenser project encourages students to think about the environmental impact of plastic bottles.
Ans: True
The project promotes recycling and waste reduction by reusing a plastic bottle.

Q4: True or False: Hot melting glue is not used in the construction of a water dispenser.
Ans: False
Hot melting glue is used to attach components in the water dispenser project.

Q5: True or False: A homemade water dispenser can only store a small amount of water.
Ans: False
The size of the homemade water dispenser can vary, and it can store a significant amount of water.

Short Answer Questions

Q1: Explain the fundamental principles of pressure and gravity in the context of how a water dispenser works.
Ans: Pressure in a water dispenser is created when the cap of the bottle is opened, allowing air pressure to push water through a straw, causing it to flow out. Gravity plays a crucial role by pulling the water downward, making it accessible for pouring. When the cap is closed, pressure is eliminated, and gravity no longer forces water out.

Q2: How does incorporating a filter into a homemade water dispenser contribute to ensuring water purity?
Ans: A filter in a homemade water dispenser traps impurities and particles present in the water, ensuring that only clean and pure water is dispensed. It removes contaminants, making the water safe to drink and improving its quality.

Q3: What educational concepts can students explore through the construction of a homemade water dispenser?
Ans: Students can explore concepts such as pressure, gravity, sustainability, recycling, and customization through the construction of a homemade water dispenser. They can also learn about practical applications and creative problem-solving in a scientific context.

Q4: Why is it important to prioritize safety when working on the water dispenser project?
Ans: Safety is crucial because the project involves tools like hot melting glue and sharp knives, which can be hazardous if not handled carefully. Additionally, supervision by parents, teachers, or responsible adults ensures that students work safely and avoid accidents.

Q5: What is the significance of reusing a plastic bottle in the water dispenser project in terms of environmental impact?
Ans: Reusing a plastic bottle in the water dispenser project promotes recycling and waste reduction. It reduces the need for new plastic bottles and minimizes plastic waste, contributing to a more environmentally friendly approach to using plastic materials.