Basic
Name 4 types of energy.
Heat, Sound, Light, Electricity, CPE, EPE, GPE, Kinetic
What is the difference between potential and kinetic energy?
Potential energy is stored energy possessed by a stationary object while kinetic energy possessed by moving objects.
What is the Law of Energy Conservation?
Energy cannot be created or destroyed. It can only be converted from one form to another form.
What is the process plants did to produce CPE?
Photosynthesis
Name 1 renewable and 1 non-renewable source of energy
Non-renewable: Fossil fuel
Renewable: Wind, Moving water, Sunlight, Heat
What are the factors that will affect Kinetic energy?
Speed and Mass
Are all forms of converted energy useful? What are they considered as?
No. They are considered as waste energy.
What is used to test for starch? What will happen if starch is present?
Iodine solution. The iodine solution will turn dark blue/blue-black.
What is the advantage of using renewable sources of energy?
It is eco-friendly, meaning it does not harm/pollute the environment
Name 2 sources of Elastic Potential energy.
A compressed/stretched spring, A stretched/twisted rubber band
How will your answer be different when one tells you to describe an energy conversion compared to write down the energy conversion?
Describe: In words and with details.
Eg. Water in the dam possesses gravitational potential energy as it is located above the
ground. When it flows through the pipe in the power station, it causes the turbine to
rotate.
Write down: Types of energy, arrows and plus signs
Eg. GPE of water > KE of water > KE of turbine
What is it not recommended to put many plants in your bedroom?
The plants will take in oxygen and respire. As there is not enough light for the plants to photosynthesise at night, they will have to compete with you for oxygen.
What is the main source of energy?
The sun
Why is a hydroelectric power plant generally built at a high place?
The water will possess a greater amount of gravitational potential energy to be converted into electricity.
Explain why a basketball will not bounce back to its original height.
As the ball is falling, GPE is converted into KE.
When the ball hits the ground, some KE is converted into SE and HE.
There will be lesser KE to carry the ball back up to its original height.
Explain the destarching process.
Put the plant in a dark place for 48 hours.