jueves, 19 de octubre de 2017

Super Simple Machines: Levers

Levers are a simple machine that help us make work easier. But how do
they work and how can you make one to help you? Check out this episode
with Squeaks and Jessi to learn all about levers!

Simple Machines for Kids: Science and Engineering for Children - FreeSchool

Simple machines have been helping people to do work for thousands of years!
The lever, wheel and axle, pulley, inclined plane, wedge, and screw each have
a job to do. Some amplify force, some change its direction, and some reduce
friction or create mechanical advantage.

Video How to make a pulley

sábado, 7 de octubre de 2017


Reproduction in flower plants in 3D

Flowers are the reproductive structures in a plant. Flower has sepal, petals, stamens and pistil. Stamen is the male reproductive part and pistil is the female reproductive part. Stamen has a stalk like structure called filament and anther. Anther contains the pollen grains which are the male gametes. Pistil contains the ovary, style and stigma. The ovary contains ovules. The egg which is the female gamete is formed in the ovule. Sexual reproduction in plants also involves the fusion of male and female gametes to form a zygote.