72 Science Tutorials

These Science tutorials are written by experienced educators, all of whom also offer private tutoring lessons. Get the Science help you need, whether through these tutorials or through private tutoring lessons.

Usages of Genetic Engineering

There are uses of genetic engineering that can benefit the society. Once again, I reiterate the definition of genetic engineering, which is the direct modification of the characteristics of an organism by manipulating its genetic material by using biotechnology.

Reasons for Genetic Engineering

Genetic engineering is the direct modification of the characteristics of an organism by manipulating its genetic material by using biotechnology. Obviously there are pros and cons for genetic engineering, but for this tutorial, I will state the pros.

Acids and Bases

In the pH scale, there are acids and bases from 0 to 14. The acids are from 0 to less than 7. The nases are from more than 7 to 14. However, there are even stronger acids and bases that goes below 0 and above 14. If you use a litmus paper, red represents the…


Mitosis is the cell division that creates two identical daughter cells to the parent(clones).


In terms of the difficulty of between cell biology and ecology on the Living Environment Regents, generally, ecology questions are easier. There is energy , transferred, and stored, and it is important to know this to understand about how the biotic factors interact. There are energy pyramids, food chains, and even more complex, food webs.

Moles to Grams – Stoichiometry

Avogadro’s number (6.02×10^23) is defined as the number of molecules, atoms, compounds, etc. per mole of a substance. Elementary particles like atoms and molecules are tiny. It is much easier to say there is 1 mole of a substance than 602,000,000,000,000,000,000,000 atoms in a certain substance. The molar mass of a substance is the number…

Balancing Equations

This problem will illustrate how to derive a chemical equation from a word problem and how to balance it.

Cell Biology – Practice Questions

These questions are meant for beginner students in undergraduate level cell biology. These are review questions based on material in the first four chapters in “Essential Cell Biology” – See link below.

A helpful approach to solving engineering and science problems

This document presents a step-by-step approach that you should find helpful in solving problems typically assigned in engineering and science courses. The approach is illustrated with a few examples.

Biodegradable Veggie Pots: The Art & Sustainability of Making Seed Starting Pots

Vegetable gardening is not just about growing and eating vegetables. Students will learn how their creation of biodegradable pots provides a positive impact in a vegetable garden environment. 1. Learn about biodegradability and the degradation processes. 2. Understand the positive environmental impacts biodegradable objects. 3. Be empowered to grow and secure their own garden vegetables…