20 questions
Sources of energy is very important for us. What is the main source of energy in the Earth?
rainbow
sun
stars
Choose the correct examples of sources of energy ...
wind, soil and fuels
running water, wind and fuels
fuels, stars and water
How do we make use of the energy from the Sun?
The sun’s energy is used by plants to make food and it’s converted into chemical potential energy in the food made by plants
The sun’s energy is used by plants to make food and it’s converted into gravitational potential energy in the food made by plants
The sun’s energy is used by plants to make food and it’s converted into gravitational potential energy in the food made by plants
Waves can also be a good source of energy. The upward and downward movement of the waves can be used to generate energy. Here’s the conversion energy that occur in the waves power station …
gravitational potential energy - kinetic energy of waves
kinetic energy of waves - electrical energy
kinetic energy of waves - potential energy
Running water in rivers is a source of energy. What kind of energy of running water that can converted into electrical energy in hydroelectric power stations?
mechanical energy
kinetic energy
chemical energy
Man has been using energy from the wind for over five thousand years. Wind has kinetic energy. Windmill and wind farms use the energy from the wind. The first invention of windmill was in Denmark. Here are the functions of Windmill, except …
it’s used to grind food
it’s used to pump water to farms
it’s used to running machines and vehicles
Fuels are another source of energy on the Earth. How can we use energy from fuels?
when fuels are burnt, the chemical potential energy is converted into heat and light energy
when fuels are burnt, the electrical energy is converted into wind energy
when fuels are burnt, energy from the running water is converted into chemical potential energy
What are the examples of fuels? …
natural gas, air and petrol
coal, petrol and natural gas
solar, water and coal
Carissa wants to make an electromagnet. She needs to prepare some things. Below are the list things for his electromagnet. What are they? …
nails, battery, and electrical wire
battery, magnetic materials and paper
electrical wire, nails and push pin
Here are the reasons if one of thing in electromagnet can’t work well, except …
it will affect the strength of an electromagnet
the magnetic materials not able to attract
the electric current will change the direction
The strength of an electromagnet increases when the number of batteries connected to the circuit increases. When Aya wants to try her paper clips, it can’t attract well. What’s the reason, why it’s happen?
the paper clips will attract well if there is less batteries
the more batteries will attract paper clips well
there isn’t good quality of the wire
What are the examples of electrical appliances that use electromagnets? …
magnetic crane, Ac and refrigerator
telephone, magnetic crane and electric bell
television, car and magnetic crane
Look at the statements below.
P. it’s based on the orbit of the Earth around the Sun
Q. it’s based on the motion of the earth
R. it’s based on the Moon’s orbit around the Earth
How does to calculate the days in a year for Christian calendar?
P
R
Q
In a Christian calendar, the new month of the year is on January. How about new month in the Muslim calendar?
Syawal
Muharram
Ramadhan
There will be extra one day should be added to every fourth year, and making it 366 days that year. And this year, there isn’t extra day of this February. The extra day of year that usually appear once in a four years as known …
New year
Leap year
Chinese year
Fuels are a limited source of energy while energy from the sun, running water wind and bio fuels are ....
An ... is a magnet made using the electricity
The muslim calender is based on ... orbit around the earth
We must use energy wisely in order to ... energy
We use ... cells and panels to collect energy from the sun. this energy is converted into electrical energy.