Bruce Donker

I currently teach high school science, I enjoy being outdoors. We raise chickens and ducks, and enjoy gardening.





Recent Posts by Bruce

Mon Apr 06, 2020 11:33 AM in Understanding the Universe
Depending on the class I am teaching I make scale models. We make a scale model of the solar system outside to compare the sizes and distances of the planets. We also make a scale model of the galaxy, we can' accuratley show the sizes of stars, to see the distances involved, and we make a nodel of our ocal group of galaxies.

Wed Jan 30, 2019 11:19 AM in Meteors
I have had student drop different objects from various height to measure crater size. They can work on determining what factors affect the craters. Depending on grade level they can calculate kinetic energy of the impact. A bucket or container with high sides with sand in it is usually what I use. Depending on grade level thay can graph the results and make predictions for other objects at variou...

Sun Dec 16, 2018 4:45 PM in Moon phases
I assume someone has already mentioned this to you, but the moon's phases are not caused by the Earth's shadow on the moon. It is the amount of the lit side of the moon we get to see. Half of the moon is alays lit(except for a solar eclipse) what changes is the amount of the lit side we get to see. if you use a bright light for the sun and a sphere for the moon and put a student in the center of ...

Recent Reviews by Bruce

Mon Aug 18, 2014 4:11 PM
4 A nice introduction for volcanoes
This has a nice simple way to have some hands-on activity for an introduction to volcanoes. There is not a lot of depth but it would be a nice way to grab the students attention to kick off a unit.

Recent Public Collections by Bruce


2 Resources

These help students visualize watershed and they can map where their local streams go to.

Chesapeake bay fieldscope
Type: User uploaded resource

watershed maps
Type: User uploaded resource

solar system

2 Resources

Structure of solar system

Solar System: The Earth in Space
Type: Science Object

Solar System: Asteroids, Comets, and Meteorites
Type: Science Object