CHSHY Kids Microscope Set Beginner Student with for San Diego Mall Kids,for,Microscope,/jussel861458.html,$27,work-fi.com,Microscope,Student,with,CHSHY,Set,,Beginner,Learning Education , Optics , Microscopes CHSHY Kids Microscope Set Beginner Student with for San Diego Mall Kids,for,Microscope,/jussel861458.html,$27,work-fi.com,Microscope,Student,with,CHSHY,Set,,Beginner,Learning Education , Optics , Microscopes $27 CHSHY Kids Microscope Set, Microscope for Student Beginner with Learning Education Optics Microscopes $27 CHSHY Kids Microscope Set, Microscope for Student Beginner with Learning Education Optics Microscopes
CHSHY Kids Microscope Set, Microscope for Student Beginner with
CHSHY Kids Microscope Set, Microscope for Student Beginner with
[ What's include ] -- Monocular viewing head with LED; comes with multi-piece accessory kit; Requires 2 AA batteries (Not included).
[ Adjustable Magnification ] -- The microscope combines a 10X eyepiece with a rotating turret of three objective lenses to offer magnifications of 100x,400x and 1200x.It also includes a color filter wheel to give transparent specimens extra definition.
[ Safety and Light Weight ] -- The children's microscope set toy is mainly made of high-quality plastics, Every corner is polished very smoothly to ensure that it will not hurt the child's hand.
[ Sharing in Real Time ] -- Included phone adapter with eyepiece allows you to capture and record beauty all around you with smart phone. You can share pictures or videos with your families and friends in real-time.
[ Scientific tool ] -- this is not only a toy, but also a set of biological science popularized early education equipment. It is very suitable As a school gift, Christmas gift, birthday gift for children.
Microscope Kit With Phone Holder Lab LED 100X 400X 1200X Student Science Educational Toy Gift Kids Refined Biological Microscope
1. Open the batteries compartment door after unscrewing the protecting screw. 2. Insert two AA batteries, as directed in the compartment's bottom."br"3. Put back the protecting screw."br"4. Lift the objective lens on as much as possible with the coarse adjustment."br"5. Put a slide with the tissue or organism that you want to observe on the stage,"br"fixed under the two stage clip."br"6. Turn on the LED light ."br"7. Adjust the focus with the coarse adjustment,and adjust the eyepiece to you eyesight by turning it gently."br"8. Adjust the light intensity with the light control knod. Too much light can crush"br""br""br"Specifications:"br""br"Name: Children Microscope Kit"br"Material: ABS"br"Stage: One layer"br"Focusing: Knobs"br"Converter: 3 holes downward"br"Item size: Approx.213*123*75mm"br"Enlargement ratio: 100X; 400X; 1200X"br"Battery: 2x AA battery(not included)"br""br""br"Please Note:"br""br""br"1. Please do not use a strong power battery, or upgrade the battery, this will cause the LED light to burn down."br"2. Beginners need to repeat this process several times until they can see clearly. It is recommended to start from a hundred times."br"3. It is unlikely that it will be in the right place once. Sample types are random, please refer to the picture.
CHSHY Kids Microscope Set, Microscope for Student Beginner with
is projected to reach 8 billion in 2023, 9 billion in 2037, and 10 billion people in the year 2055.
has doubled in 40 years from 1959 (3 billion) to 1999 (6 billion).
is currently (2020) growing at a rate of around 1.05 % per year, adding 81 million people per year to the total.
growth rate reached its peak in the late 1960s, when it was at 2.09%.
growth rate is currently declining and is projected to continue to decline in the coming years (reaching below 0.50% by 2050, and 0.03% in 2100) .
a tremendous change occurred with the industrial revolution: whereas it had taken all of human history up to the year 1800 for world population to reach 1 billion, the second billion was achieved in only 130 years (1930), the third billion in 30 years (1960), the fourth billion in 15 years (1974), the fifth billion in 13 years (1987), the sixth billion in 12 years (1999) and the seventh billion in 12 years (2011). During the 20th century alone, the population in the world has grown from 1.65 billion to 6 billion.
As recently as 1965, bicycle and car production volumes were essentially the same, at nearly 20 million each per year, but as of 2003 bike production had climbed to over 100 million per year compared with around 50 million cars produced that year.
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